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Raspberry Pi 1Tbyte hard drive kit

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  Raspberry Pi 1Tbyte hard drive kit "James Harris" <james.harris.1@gmail.com> - 2015-09-10 22:56 +0100
    Re: Raspberry Pi 1Tbyte hard drive kit ray carter <ray@zianet.com> - 2015-09-10 22:24 +0000
      Re: Raspberry Pi 1Tbyte hard drive kit mrbrad <lostgonzo@gmail.com> - 2015-09-10 23:36 -0500
        Re: Raspberry Pi 1Tbyte hard drive kit mrbrad <lostgonzo@gmail.com> - 2015-09-19 23:23 -0500
          Re: Raspberry Pi 1Tbyte hard drive kit rickman <gnuarm@gmail.com> - 2015-09-20 00:42 -0400
            Re: Raspberry Pi 1Tbyte hard drive kit mrbrad <lostgonzo@gmail.com> - 2015-09-20 01:56 -0500
      Re: Raspberry Pi 1Tbyte hard drive kit mm0fmf <none@mailinator.com> - 2015-09-11 18:13 +0100
        Re: Raspberry Pi 1Tbyte hard drive kit "James Harris" <james.harris.1@gmail.com> - 2015-09-11 18:19 +0100
          Re: Raspberry Pi 1Tbyte hard drive kit mm0fmf <none@mailinator.com> - 2015-09-11 20:05 +0100
            Re: Raspberry Pi 1Tbyte hard drive kit rickman <gnuarm@gmail.com> - 2015-09-11 17:55 -0400
            Re: Raspberry Pi 1Tbyte hard drive kit "James Harris" <james.harris.1@gmail.com> - 2015-09-12 00:05 +0100
              Re: Raspberry Pi 1Tbyte hard drive kit David Taylor <david-taylor@blueyonder.co.uk.invalid> - 2015-09-12 05:21 +0100
                Re: Raspberry Pi 1Tbyte hard drive kit "James Harris" <james.harris.1@gmail.com> - 2015-09-12 11:41 +0100
                  Re: Raspberry Pi 1Tbyte hard drive kit David Taylor <david-taylor@blueyonder.co.uk.invalid> - 2015-09-12 13:17 +0100
                  Re: Raspberry Pi 1Tbyte hard drive kit Rob Morley <nospam@ntlworld.com> - 2015-09-12 15:28 +0100
              Re: Raspberry Pi 1Tbyte hard drive kit mm0fmf <none@mailinator.com> - 2015-09-12 08:22 +0100
                Re: Raspberry Pi 1Tbyte hard drive kit rickman <gnuarm@gmail.com> - 2015-09-12 03:30 -0400
              Re: Raspberry Pi 1Tbyte hard drive kit Mike Fleming <{mike}@tauzero.co.uk> - 2015-09-12 09:02 +0100
                Re: Raspberry Pi 1Tbyte hard drive kit mm0fmf <none@mailinator.com> - 2015-09-12 09:11 +0100
                  Re: Raspberry Pi 1Tbyte hard drive kit rickman <gnuarm@gmail.com> - 2015-09-12 04:19 -0400
    Re: Raspberry Pi 1Tbyte hard drive kit David Taylor <david-taylor@blueyonder.co.uk.invalid> - 2015-09-11 07:21 +0100
      Re: Raspberry Pi 1Tbyte hard drive kit "James Harris" <james.harris.1@gmail.com> - 2015-09-16 18:59 +0100
        Re: Raspberry Pi 1Tbyte hard drive kit ray carter <ray@zianet.com> - 2015-09-16 19:23 +0000
    Re: Raspberry Pi 1Tbyte hard drive kit rickman <gnuarm@gmail.com> - 2015-09-11 13:30 -0400
      Re: Raspberry Pi 1Tbyte hard drive kit "James Harris" <james.harris.1@gmail.com> - 2015-09-16 19:02 +0100
        Re: Raspberry Pi 1Tbyte hard drive kit rickman <gnuarm@gmail.com> - 2015-09-16 14:23 -0400
          Re: Raspberry Pi 1Tbyte hard drive kit "James Harris" <james.harris.1@gmail.com> - 2015-09-16 19:42 +0100
            Re: Raspberry Pi 1Tbyte hard drive kit rickman <gnuarm@gmail.com> - 2015-09-16 15:37 -0400
              Re: Raspberry Pi 1Tbyte hard drive kit "James Harris" <james.harris.1@gmail.com> - 2015-09-16 20:54 +0100
                Re: Raspberry Pi 1Tbyte hard drive kit rickman <gnuarm@gmail.com> - 2015-09-16 16:41 -0400
            Re: Raspberry Pi 1Tbyte hard drive kit Martin Gregorie <martin@address-in-sig.invalid> - 2015-09-16 19:42 +0000
              Re: Raspberry Pi 1Tbyte hard drive kit "James Harris" <james.harris.1@gmail.com> - 2015-09-16 21:06 +0100
                Re: Raspberry Pi 1Tbyte hard drive kit Martin Gregorie <martin@address-in-sig.invalid> - 2015-09-16 21:19 +0000

Page 1 of 2  [1] 2  Next page →

#9602 — Raspberry Pi 1Tbyte hard drive kit

FYI, there is a Western Digital 1Tbyte hard drive kit for the Raspberry 
Pi

http://liliputing.com/2015/09/wd-pidrive-is-a-1tb-hard-drive-kit-for-the-raspberry-pi.html

Interestingly, as well as the 2.5-inch hard drive the kit includes a 
special cable to split the power, and a 4Gbyte SD card - which seems an 
odd addition to a hard drive. (The SD card is for the OS if you don't 
already have one.)

Price is $80 or, and here the story gets a little stranger, apparently 
about $60 with a BitTorrent coupon code.

http://blog.getsync.com/2015/09/04/sync-wd-raspberry-pi/

I just tried the (time limited) coupon code on the wdc.com web site and 
the UK kit price dropped from £70 to £45.50, a saving of £24.50 or 35% - 
so the code certainly works!

The resulting price, £45.50 includes a 10W power adapter. I guess that 
means 10W output power of 5V @ 2A. Sounds like it would save on the cost 
of a Pi power adapter too.

This is not something I have looked for before. I have ordered a kit for 
myself but in case it's of help to others do you guys have any thoughts 
on how the above compares with other Raspberry Pi hard drive solutions?

James

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#9603

On Thu, 10 Sep 2015 22:56:09 +0100, James Harris wrote:

> FYI, there is a Western Digital 1Tbyte hard drive kit for the Raspberry
> Pi
> 
> http://liliputing.com/2015/09/wd-pidrive-is-a-1tb-hard-drive-kit-for-
the-raspberry-pi.html
> 
> Interestingly, as well as the 2.5-inch hard drive the kit includes a
> special cable to split the power, and a 4Gbyte SD card - which seems an
> odd addition to a hard drive. (The SD card is for the OS if you don't
> already have one.)
> 
> Price is $80 or, and here the story gets a little stranger, apparently
> about $60 with a BitTorrent coupon code.
> 
> http://blog.getsync.com/2015/09/04/sync-wd-raspberry-pi/
> 
> I just tried the (time limited) coupon code on the wdc.com web site and
> the UK kit price dropped from £70 to £45.50, a saving of £24.50 or 35% -
> so the code certainly works!
> 
> The resulting price, £45.50 includes a 10W power adapter. I guess that
> means 10W output power of 5V @ 2A. Sounds like it would save on the cost
> of a Pi power adapter too.
> 
> This is not something I have looked for before. I have ordered a kit for
> myself but in case it's of help to others do you guys have any thoughts
> on how the above compares with other Raspberry Pi hard drive solutions?
> 
> James

I don't see how that's much differrent from any USB external drive 
(except that it comes without a case). 2TB and 3TB drives are available 
in US under $100.

I can see how you'd set it up as a network drive, but that's not a 
requirement for me.

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#9604

On 9/10/2015 5:24 PM, ray carter wrote:
> On Thu, 10 Sep 2015 22:56:09 +0100, James Harris wrote:
>
>> FYI, there is a Western Digital 1Tbyte hard drive kit for the Raspberry
>> Pi
>>
>> http://liliputing.com/2015/09/wd-pidrive-is-a-1tb-hard-drive-kit-for-
> the-raspberry-pi.html
>>
>> Interestingly, as well as the 2.5-inch hard drive the kit includes a
>> special cable to split the power, and a 4Gbyte SD card - which seems an
>> odd addition to a hard drive. (The SD card is for the OS if you don't
>> already have one.)
>>
>> Price is $80 or, and here the story gets a little stranger, apparently
>> about $60 with a BitTorrent coupon code.
>>
>> http://blog.getsync.com/2015/09/04/sync-wd-raspberry-pi/
>>
>> I just tried the (time limited) coupon code on the wdc.com web site and
>> the UK kit price dropped from £70 to £45.50, a saving of £24.50 or 35% -
>> so the code certainly works!
>>
>> The resulting price, £45.50 includes a 10W power adapter. I guess that
>> means 10W output power of 5V @ 2A. Sounds like it would save on the cost
>> of a Pi power adapter too.
>>
>> This is not something I have looked for before. I have ordered a kit for
>> myself but in case it's of help to others do you guys have any thoughts
>> on how the above compares with other Raspberry Pi hard drive solutions?
>>
>> James
>
> I don't see how that's much differrent from any USB external drive
> (except that it comes without a case). 2TB and 3TB drives are available
> in US under $100.
>
> I can see how you'd set it up as a network drive, but that's not a
> requirement for me.W
>



Well imho the site is kinda screwy...you can't make a customer account 
(usa version) till you make an order....so my first order was blind 
because it looked like it took..but got no confirm nor email nor would 
it take my info after the fact to log on as it said. Used (amex) 
verified with amex that it did NOT go thru after 1/2 hr.

So anyway went on did it all again ..this time used PAYPAL with AMEX
as my card under paypal ..worked just fine etc

So just in case I'd use the credit card option with paypal to order
simply because if it does NOT go thru or whatever you have no way of
knowing ...because you can't get a customer account till after your
first order

so anyway here is the other thing....seems the USA site is already
at 35% special from $79.99 to $51.99 ...tax for your state is added
and the difference between GROUND shipping and 2 Day Shipping was
1.00 or 6.99 for 2 day shipping ..so get that imho for the extra buck.

So anyway at least for now (the above special) the code does not work
(yeah I'm cheap I tried it)

Lastly, they only allow you an order of ONE ..not that I needed 2
or anything but testing the order box ...would not let me add to
box...so you need more at this price....sucker a friend to do so.

Anyway..what happened to me...so again I'd avoid the cc option for
now and use the cc option under paypal ...I had no luck at all the
first time thru with this screwy site. Just saying :)

http://store.wdc.com/store/wdus/en_US/DisplayAccesoryProductDetailsPage/ThemeID.21986300/Accessories/WD_PiDrive_Kit/productID.323686500/categoryId.13096100

(Gonna use the drive overkill thou it may be on my Litecoin Node
just to contribute to the Litecoin blockchain network...yeah I need a 
life) :)





---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

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#9696

For those interested the usa site has the pi at the price below at 
discount for 51.95 from the orig price of 79.99 and the code below quoted
does NOT work in that they already have the 35% off in that price
without the code

however

got an email from buying 1 a week or so ago and they Western Digital (WD 
on email) include a code for 20% off the price of a WD item from their store

so I tried it at the 51.95 price and it DID WORK and dropped the price
down from 51.95 to 41.59 usd (shipping ground is free) and you prob pay
tax in the states on your sales tax for your state

did it via paypal and credit card option the other way hung the last 
time i tried it so paypal and credit card is the same thing so if you
have issues

anyway got a 2nd one for 41.59 just because i have a 2nd pi and it at
that price seemed a good deal

anyway for those who may or may not get this email from them on the 
first order got this as email spam and it worked ..if you got zip
from your previous WD order contact them as well in email should also
work

anyway for those into impulse buying of probably a 2nd 1 TB Pi WD Drive
Kit ..this is the way to go imho :)

Brad



On 9/10/2015 11:36 PM, mrbrad wrote:
> On 9/10/2015 5:24 PM, ray carter wrote:
>> On Thu, 10 Sep 2015 22:56:09 +0100, James Harris wrote:
>>
>>> FYI, there is a Western Digital 1Tbyte hard drive kit for the Raspberry
>>> Pi
>>>
>>> http://liliputing.com/2015/09/wd-pidrive-is-a-1tb-hard-drive-kit-for-
>> the-raspberry-pi.html
>>>
>>> Interestingly, as well as the 2.5-inch hard drive the kit includes a
>>> special cable to split the power, and a 4Gbyte SD card - which seems an
>>> odd addition to a hard drive. (The SD card is for the OS if you don't
>>> already have one.)
>>>
>>> Price is $80 or, and here the story gets a little stranger, apparently
>>> about $60 with a BitTorrent coupon code.
>>>
>>> http://blog.getsync.com/2015/09/04/sync-wd-raspberry-pi/
>>>
>>> I just tried the (time limited) coupon code on the wdc.com web site and
>>> the UK kit price dropped from £70 to £45.50, a saving of £24.50 or 35% -
>>> so the code certainly works!
>>>
>>> The resulting price, £45.50 includes a 10W power adapter. I guess that
>>> means 10W output power of 5V @ 2A. Sounds like it would save on the cost
>>> of a Pi power adapter too.
>>>
>>> This is not something I have looked for before. I have ordered a kit for
>>> myself but in case it's of help to others do you guys have any thoughts
>>> on how the above compares with other Raspberry Pi hard drive solutions?
>>>
>>> James
>>
>> I don't see how that's much differrent from any USB external drive
>> (except that it comes without a case). 2TB and 3TB drives are available
>> in US under $100.
>>
>> I can see how you'd set it up as a network drive, but that's not a
>> requirement for me.W
>>
>
>
>
> Well imho the site is kinda screwy...you can't make a customer account
> (usa version) till you make an order....so my first order was blind
> because it looked like it took..but got no confirm nor email nor would
> it take my info after the fact to log on as it said. Used (amex)
> verified with amex that it did NOT go thru after 1/2 hr.
>
> So anyway went on did it all again ..this time used PAYPAL with AMEX
> as my card under paypal ..worked just fine etc
>
> So just in case I'd use the credit card option with paypal to order
> simply because if it does NOT go thru or whatever you have no way of
> knowing ...because you can't get a customer account till after your
> first order
>
> so anyway here is the other thing....seems the USA site is already
> at 35% special from $79.99 to $51.99 ...tax for your state is added
> and the difference between GROUND shipping and 2 Day Shipping was
> 1.00 or 6.99 for 2 day shipping ..so get that imho for the extra buck.
>
> So anyway at least for now (the above special) the code does not work
> (yeah I'm cheap I tried it)
>
> Lastly, they only allow you an order of ONE ..not that I needed 2
> or anything but testing the order box ...would not let me add to
> box...so you need more at this price....sucker a friend to do so.
>
> Anyway..what happened to me...so again I'd avoid the cc option for
> now and use the cc option under paypal ...I had no luck at all the
> first time thru with this screwy site. Just saying :)
>
> http://store.wdc.com/store/wdus/en_US/DisplayAccesoryProductDetailsPage/ThemeID.21986300/Accessories/WD_PiDrive_Kit/productID.323686500/categoryId.13096100
>
>
> (Gonna use the drive overkill thou it may be on my Litecoin Node
> just to contribute to the Litecoin blockchain network...yeah I need a
> life) :)
>
>
>
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>


---
This email has been checked for viruses by Avast antivirus software.
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#9697

On 9/20/2015 12:23 AM, mrbrad wrote:
> For those interested the usa site has the pi at the price below at
> discount for 51.95 from the orig price of 79.99 and the code below quoted
> does NOT work in that they already have the 35% off in that price
> without the code
>
> however
>
> got an email from buying 1 a week or so ago and they Western Digital (WD
> on email) include a code for 20% off the price of a WD item from their
> store
>
> so I tried it at the 51.95 price and it DID WORK and dropped the price
> down from 51.95 to 41.59 usd (shipping ground is free) and you prob pay
> tax in the states on your sales tax for your state
>
> did it via paypal and credit card option the other way hung the last
> time i tried it so paypal and credit card is the same thing so if you
> have issues
>
> anyway got a 2nd one for 41.59 just because i have a 2nd pi and it at
> that price seemed a good deal
>
> anyway for those who may or may not get this email from them on the
> first order got this as email spam and it worked ..if you got zip
> from your previous WD order contact them as well in email should also
> work
>
> anyway for those into impulse buying of probably a 2nd 1 TB Pi WD Drive
> Kit ..this is the way to go imho :)

I'm holding out for the 3 TB drive.  I have a 2 TB data base I would 
like to host.

-- 

Rick

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#9698

On 9/19/2015 11:42 PM, rickman wrote:
> On 9/20/2015 12:23 AM, mrbrad wrote:
>> For those interested the usa site has the pi at the price below at
>> discount for 51.95 from the orig price of 79.99 and the code below quoted
>> does NOT work in that they already have the 35% off in that price
>> without the code
>>
>> however
>>
>> got an email from buying 1 a week or so ago and they Western Digital (WD
>> on email) include a code for 20% off the price of a WD item from their
>> store
>>
>> so I tried it at the 51.95 price and it DID WORK and dropped the price
>> down from 51.95 to 41.59 usd (shipping ground is free) and you prob pay
>> tax in the states on your sales tax for your state
>>
>> did it via paypal and credit card option the other way hung the last
>> time i tried it so paypal and credit card is the same thing so if you
>> have issues
>>
>> anyway got a 2nd one for 41.59 just because i have a 2nd pi and it at
>> that price seemed a good deal
>>
>> anyway for those who may or may not get this email from them on the
>> first order got this as email spam and it worked ..if you got zip
>> from your previous WD order contact them as well in email should also
>> work
>>
>> anyway for those into impulse buying of probably a 2nd 1 TB Pi WD Drive
>> Kit ..this is the way to go imho :)
>
> I'm holding out for the 3 TB drive.  I have a 2 TB data base I would
> like to host.
>



depending on the price of your 3 TB drive from WD ...it is 20% off 
anything if I remember right you may want to get the 1tb drive 1st at 
the above 41.59 if by some chance it makes sense if you can get the 20%
off the 3 TB stuff and/or other?

here is the quote from the plug of the 20% off email I got from WD 
products after buying the 1 TB at the 51.95 price discount etc

 > Thank you for your recent purchase on wdstore.com. We hope you are
 > enjoying your product(s).
 >
 > To show our appreciation, we would like to extend an offer for *20% off*
 > your next purchase from wdstore.com

 > Enter this unique coupon code


anyway probably the 20% off is not that big a deal..but on top of the 
original 35% off which seems to be the new price 51.95 and this 20% off
other products....it is possible you'd also get a code too boot like I
did for that 20% off after you did the 1st deal and got the wd 1tb hd
at 51.95...

whatever just saying might be worth looking into ...i guess it may not 
make that much difference except for a discount on a 2nd wd 1tb unit
but hey you can never have enough toys nor coupons :)





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#9606

On 10/09/2015 23:24, ray carter wrote:
> I don't see how that's much differrent from any USB external drive

The drive has a USB3 interface built in the disk as opposed to being 
SATA drive with outboard SATA<>USB3 interface.

If it supports UASP then that would be a plus for use on other (non-Pi) 
USB3 controllers.

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#9607

"mm0fmf" <none@mailinator.com> wrote in message 
news:FYDIx.283815$zk7.22241@fx26.am4...
> On 10/09/2015 23:24, ray carter wrote:
>> I don't see how that's much differrent from any USB external drive
>
> The drive has a USB3 interface built in the disk as opposed to being 
> SATA drive with outboard SATA<>USB3 interface.

As I read it it has a USB3 *cable*. At this point I am not so sure about 
the drive interface.

> If it supports UASP then that would be a plus for use on other 
> (non-Pi) USB3 controllers.

I had to look that up. In case anyone else wonders what UASP is I 
presume you mean

  https://en.wikipedia.org/wiki/USB_Attached_SCSI

James

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#9610

On 11/09/2015 18:19, James Harris wrote:
>
> "mm0fmf" <none@mailinator.com> wrote in message
> news:FYDIx.283815$zk7.22241@fx26.am4...
>> On 10/09/2015 23:24, ray carter wrote:
>>> I don't see how that's much differrent from any USB external drive
>>
>> The drive has a USB3 interface built in the disk as opposed to being
>> SATA drive with outboard SATA<>USB3 interface.
>
> As I read it it has a USB3 *cable*. At this point I am not so sure about
> the drive interface.
>
I am, there is a USB3 micro B connector clearly visible on the back of 
disk. You did look at the picture didn't you?  Or maybe you could read 
the quick install guide which shows how it connects. ;-)

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#9612

On 9/11/2015 3:05 PM, mm0fmf wrote:
> On 11/09/2015 18:19, James Harris wrote:
>>
>> "mm0fmf" <none@mailinator.com> wrote in message
>> news:FYDIx.283815$zk7.22241@fx26.am4...
>>> On 10/09/2015 23:24, ray carter wrote:
>>>> I don't see how that's much differrent from any USB external drive
>>>
>>> The drive has a USB3 interface built in the disk as opposed to being
>>> SATA drive with outboard SATA<>USB3 interface.
>>
>> As I read it it has a USB3 *cable*. At this point I am not so sure about
>> the drive interface.
>>
> I am, there is a USB3 micro B connector clearly visible on the back of
> disk. You did look at the picture didn't you?  Or maybe you could read
> the quick install guide which shows how it connects. ;-)

Any idea if the USB3 interface is native to the drive or just done with 
an internal SATA interface and an inboard  SATA<>USB3 chip?  It's not 
like that wouldn't be the easy route for the drive maker.  Are USB3 
drives common?  If so, I guess USB3 might be done natively.

-- 

Rick

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#9613

"mm0fmf" <none@mailinator.com> wrote in message 
news:cCFIx.320763$GG3.8135@fx10.am4...
> On 11/09/2015 18:19, James Harris wrote:
>>
>> "mm0fmf" <none@mailinator.com> wrote in message
>> news:FYDIx.283815$zk7.22241@fx26.am4...

...

>>> The drive has a USB3 interface built in the disk as opposed to being
>>> SATA drive with outboard SATA<>USB3 interface.
>>
>> As I read it it has a USB3 *cable*. At this point I am not so sure 
>> about
>> the drive interface.
>>
> I am, there is a USB3 micro B connector clearly visible on the back of 
> disk. You did look at the picture didn't you?  Or maybe you could read 
> the quick install guide which shows how it connects. ;-)

Call me a cynic if you like but the presence of a connector does not 
mean that all the pins are connected and functional. That *may* be the 
case but the blurb I read did not say that the drive electronics were 
USB3, only the cable. As the Raspberry Pi has USB 2 there would be no 
advantage to having any working USB 3 on the drive.

For example, maybe WD made a load of these drives and found that they 
would not run at USB 3 speeds so they thought they would sell them off 
as a bundle or kit for something that had only USB 2 support....

James

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#9614

On 12/09/2015 00:05, James Harris wrote:
[]
> Call me a cynic if you like but the presence of a connector does not
> mean that all the pins are connected and functional. That *may* be the
> case but the blurb I read did not say that the drive electronics were
> USB3, only the cable. As the Raspberry Pi has USB 2 there would be no
> advantage to having any working USB 3 on the drive.
[]
> James

Actually, when testing with PCs I have found that USB 3.0 devices often 
perform faster than USB 2.0 devices even when plugged into the sane USB 
2.0 port.  Perhaps they are faster internally, perhaps there is less 
overhead in the interface, or whatever.   Speed tests can and do show an 
advantage.  Check for yourself.

I've not tested this on the RPi, though.

-- 
Cheers,
David
Web: http://www.satsignal.eu

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#9622

"David Taylor" <david-taylor@blueyonder.co.uk.invalid> wrote in message 
news:mt0947$irb$1@dont-email.me...

..

> Actually, when testing with PCs I have found that USB 3.0 devices 
> often perform faster than USB 2.0 devices even when plugged into the 
> sane USB 2.0 port.  Perhaps they are faster internally, perhaps there 
> is less overhead in the interface, or whatever.   Speed tests can and 
> do show an advantage.  Check for yourself.

Do you have a particluar way of doing such speed tests or a certain 
piece of software that you trust to give good figures?

I ask because I don't think a simple data transfer is enough. IME the 
speed of a disk varies a lot between outer and inner cylinders. For 
example,

  http://miscel.wikidot.com/disk-throughput

That particular disk averaged (using long 1-minute averages) about 
80Mbyte/s on the outer cylinders and 40Mbyte/s on the inner. So SDTRs 
(sustainable data transfer rates) can vary by a factor of 2 depending 
simply on which part of the disk surface is being accessed.

Added to that, short-term averages could show figures significantly 
higher or lower as they interact with things like the disk drive's 
inbuilt buffer memory, how a file is laid out on disk (the above graph 
was from disk-order sector access), other loads, remapped sectors, and 
drive autonomous operations.

James

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#9623

On 12/09/2015 11:41, James Harris wrote:
>
> "David Taylor" <david-taylor@blueyonder.co.uk.invalid> wrote in message
> news:mt0947$irb$1@dont-email.me...
>
> ..
>
>> Actually, when testing with PCs I have found that USB 3.0 devices
>> often perform faster than USB 2.0 devices even when plugged into the
>> sane USB 2.0 port.  Perhaps they are faster internally, perhaps there
>> is less overhead in the interface, or whatever.   Speed tests can and
>> do show an advantage.  Check for yourself.
>
> Do you have a particluar way of doing such speed tests or a certain
> piece of software that you trust to give good figures?
>
> I ask because I don't think a simple data transfer is enough. IME the
> speed of a disk varies a lot between outer and inner cylinders. For
> example,
>
>   http://miscel.wikidot.com/disk-throughput
>
> That particular disk averaged (using long 1-minute averages) about
> 80Mbyte/s on the outer cylinders and 40Mbyte/s on the inner. So SDTRs
> (sustainable data transfer rates) can vary by a factor of 2 depending
> simply on which part of the disk surface is being accessed.
>
> Added to that, short-term averages could show figures significantly
> higher or lower as they interact with things like the disk drive's
> inbuilt buffer memory, how a file is laid out on disk (the above graph
> was from disk-order sector access), other loads, remapped sectors, and
> drive autonomous operations.
>
> James

James, I use this software - h2testw:

   http://www.heise.de/download/h2testw.html

It does large file transfers, but is primarily designed to check that a 
32 GB memory card really has 32 GB and is not a remarked rip-off.  Quite 
accept what you say about large versus small transfers, random versus 
sequential etc.

For HD testing I have used HD tune 2.55, so I appreciate speed the 
difference between different regions of an HD.

Most of my testing has been with SD cards, and a few USB memory sticks, 
but moving to USB 3.0 on both device and PC interface has made HD 
transfers (backups or large Zip files generated nightly on a PC), and SD 
card reading (out of the camera, getting pictures onto a PC) a lot quicker.

-- 
Cheers,
David
Web: http://www.satsignal.eu

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#9624

On Sat, 12 Sep 2015 11:41:45 +0100
"James Harris" <james.harris.1@gmail.com> wrote:

> I ask because I don't think a simple data transfer is enough. IME the 
> speed of a disk varies a lot between outer and inner cylinders. For 
> example,
> 
If you're testing sustained transfer do it across the whole platter (or
at least at the inside and outside). Multiple small or heavily
fragmented files will be more affected by seek time, and physical cache
may have a major effect on small transfers.  I suspect that the way the
OS behaves can also have an effect (in addition to its own caching
behaviour) but I've never noticed comparison tests that use multiple
OSs.

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#9617

On 12/09/2015 00:05, James Harris wrote:
> "mm0fmf" <none@mailinator.com> wrote in message
> news:cCFIx.320763$GG3.8135@fx10.am4...
>> On 11/09/2015 18:19, James Harris wrote:
>>>
>>> "mm0fmf" <none@mailinator.com> wrote in message
>>> news:FYDIx.283815$zk7.22241@fx26.am4...
>
> ...
>
>>>> The drive has a USB3 interface built in the disk as opposed to being
>>>> SATA drive with outboard SATA<>USB3 interface.
>>>
>>> As I read it it has a USB3 *cable*. At this point I am not so sure about
>>> the drive interface.
>>>
>> I am, there is a USB3 micro B connector clearly visible on the back of
>> disk. You did look at the picture didn't you?  Or maybe you could read
>> the quick install guide which shows how it connects. ;-)
>
> Call me a cynic if you like but the presence of a connector does not
> mean that all the pins are connected and functional. That *may* be the
> case but the blurb I read did not say that the drive electronics were
> USB3, only the cable. As the Raspberry Pi has USB 2 there would be no
> advantage to having any working USB 3 on the drive.
>
> For example, maybe WD made a load of these drives and found that they
> would not run at USB 3 speeds so they thought they would sell them off
> as a bundle or kit for something that had only USB 2 support....
>
> James
>

Well given I work for a company that designs USB host and device 
controller IP, a company that designs and produces USB driver software 
and I work in the USB IP department on our USB product portfolio, maybe 
I know something more about USB and this WD drive than you do :-)

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#9618

On 9/12/2015 3:22 AM, mm0fmf wrote:
> On 12/09/2015 00:05, James Harris wrote:
>> "mm0fmf" <none@mailinator.com> wrote in message
>> news:cCFIx.320763$GG3.8135@fx10.am4...
>>> On 11/09/2015 18:19, James Harris wrote:
>>>>
>>>> "mm0fmf" <none@mailinator.com> wrote in message
>>>> news:FYDIx.283815$zk7.22241@fx26.am4...
>>
>> ...
>>
>>>>> The drive has a USB3 interface built in the disk as opposed to being
>>>>> SATA drive with outboard SATA<>USB3 interface.
>>>>
>>>> As I read it it has a USB3 *cable*. At this point I am not so sure
>>>> about
>>>> the drive interface.
>>>>
>>> I am, there is a USB3 micro B connector clearly visible on the back of
>>> disk. You did look at the picture didn't you?  Or maybe you could read
>>> the quick install guide which shows how it connects. ;-)
>>
>> Call me a cynic if you like but the presence of a connector does not
>> mean that all the pins are connected and functional. That *may* be the
>> case but the blurb I read did not say that the drive electronics were
>> USB3, only the cable. As the Raspberry Pi has USB 2 there would be no
>> advantage to having any working USB 3 on the drive.
>>
>> For example, maybe WD made a load of these drives and found that they
>> would not run at USB 3 speeds so they thought they would sell them off
>> as a bundle or kit for something that had only USB 2 support....
>>
>> James
>>
>
> Well given I work for a company that designs USB host and device
> controller IP, a company that designs and produces USB driver software
> and I work in the USB IP department on our USB product portfolio, maybe
> I know something more about USB and this WD drive than you do :-)

I dunno, do you?  I see a lot of bluster.  Do you know about this drive? 
  Did you work on anything for this drive?  I haven't seen you post 
anything other than that you can see a USB3 connector.

I expect if the drive has a SATA to USB converter chip inside it would 
be detectable by some method just as you can identify all the USB 
components in the chain.  Am I wrong?  Anyone tried this?

-- 

Rick

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#9619

In article <msvmkf$853$1@dont-email.me>, "James Harris"
<james.harris.1@gmail.com> writes:

> Call me a cynic if you like but the presence of a connector does not 
> mean that all the pins are connected and functional. That *may* be the 
> case but the blurb I read did not say that the drive electronics were 
> USB3, only the cable. As the Raspberry Pi has USB 2 there would be no 
> advantage to having any working USB 3 on the drive.
> 
> For example, maybe WD made a load of these drives and found that they 
> would not run at USB 3 speeds so they thought they would sell them off 
> as a bundle or kit for something that had only USB 2 support....

Well, you could always try tracking down the specs for the drive used.
There's a photo of the kit which shows the drive to be a WD10JMVW.
There don't seem to be any specs available for the drive itself but it
would appear to be the drive used in the 1TB Passport drive.

http://www.pcadvisor.co.uk/review/portable-storage/wd-my-passport-ultra-review-3449074/

Wild speculation is always more fun though.

-- 
Mike Fleming

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#9620

On 12/09/2015 09:02, Mike Fleming wrote:
> In article <msvmkf$853$1@dont-email.me>, "James Harris"
> <james.harris.1@gmail.com> writes:
>
>> Call me a cynic if you like but the presence of a connector does not
>> mean that all the pins are connected and functional. That *may* be the
>> case but the blurb I read did not say that the drive electronics were
>> USB3, only the cable. As the Raspberry Pi has USB 2 there would be no
>> advantage to having any working USB 3 on the drive.
>>
>> For example, maybe WD made a load of these drives and found that they
>> would not run at USB 3 speeds so they thought they would sell them off
>> as a bundle or kit for something that had only USB 2 support....
>
> Well, you could always try tracking down the specs for the drive used.
> There's a photo of the kit which shows the drive to be a WD10JMVW.
> There don't seem to be any specs available for the drive itself but it
> would appear to be the drive used in the 1TB Passport drive.
>
> http://www.pcadvisor.co.uk/review/portable-storage/wd-my-passport-ultra-review-3449074/
>
> Wild speculation is always more fun though.
>

 From WD's website

http://store.wdc.com/store/wdeu/en_GB/DisplayAccesoryProductDetailsPage/ThemeID.22586100/Accessories/WD_PiDrive_Kit/productID.325370000/categoryId.70262400

"What It Comes With
     1TB Native USB Hard Drive
     1 microSD™ card with SD card adapter
     1 Power Adapter and USB cable
     1 USB WD PiDrive Cable
     1 Install Guide"


I wont hold my breath for all those without a clue to say "gosh you were 
right all along".

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#9621

On 9/12/2015 4:11 AM, mm0fmf wrote:
> On 12/09/2015 09:02, Mike Fleming wrote:
>> In article <msvmkf$853$1@dont-email.me>, "James Harris"
>> <james.harris.1@gmail.com> writes:
>>
>>> Call me a cynic if you like but the presence of a connector does not
>>> mean that all the pins are connected and functional. That *may* be the
>>> case but the blurb I read did not say that the drive electronics were
>>> USB3, only the cable. As the Raspberry Pi has USB 2 there would be no
>>> advantage to having any working USB 3 on the drive.
>>>
>>> For example, maybe WD made a load of these drives and found that they
>>> would not run at USB 3 speeds so they thought they would sell them off
>>> as a bundle or kit for something that had only USB 2 support....
>>
>> Well, you could always try tracking down the specs for the drive used.
>> There's a photo of the kit which shows the drive to be a WD10JMVW.
>> There don't seem to be any specs available for the drive itself but it
>> would appear to be the drive used in the 1TB Passport drive.
>>
>> http://www.pcadvisor.co.uk/review/portable-storage/wd-my-passport-ultra-review-3449074/
>>
>>
>> Wild speculation is always more fun though.
>>
>
>  From WD's website
>
> http://store.wdc.com/store/wdeu/en_GB/DisplayAccesoryProductDetailsPage/ThemeID.22586100/Accessories/WD_PiDrive_Kit/productID.325370000/categoryId.70262400
>
>
> "What It Comes With
>      1TB Native USB Hard Drive
>      1 microSD™ card with SD card adapter
>      1 Power Adapter and USB cable
>      1 USB WD PiDrive Cable
>      1 Install Guide"
>
>
> I wont hold my breath for all those without a clue to say "gosh you were
> right all along".

I'm curious what you think you are right about.  I'm not trying to be 
argumentative.  I just don't get what you are saying here.

-- 

Rick

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