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Re: Stop SSD from waiting for "Spinning up disk..."

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  Re: Stop SSD from waiting for "Spinning up disk..." Jeff Chua <jeff.chua.linux@gmail.com> - 2015-06-25 02:00 +0200
    Re: Stop SSD from waiting for "Spinning up disk..." Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-06-25 03:50 +0200
      Re: Stop SSD from waiting for "Spinning up disk..." Martin Steigerwald <martin@lichtvoll.de> - 2015-06-25 08:10 +0200
        Re: Stop SSD from waiting for "Spinning up disk..." Jeff Chua <jeff.chua.linux@gmail.com> - 2015-06-25 11:00 +0200

#1171747 — Re: Stop SSD from waiting for "Spinning up disk..."

On Thu, Jun 25, 2015 at 12:28 AM, Greg Kroah-Hartman
<gregkh@linuxfoundation.org> wrote:
> On Thu, Jun 25, 2015 at 12:22:47AM +0800, Jeff Chua wrote:

>> Both sda and sdb have the same SSD model.
>
> That's a bug in your USB bridge chip, odds are it is not reporting the
> value properly.  There's nothing the scsi core or USB stack can do about
> this, sorry.  Please complain to the hardware manufacturer.

There are workaround boot cmdline parameters for other things ... any
chance to consider  one to fix broken rotational option? I'm not sure
how many out there are broken, but I really would like a faster way to
access my USB SSD without waiting for the "disk spinup".

Thanks,
Jeff.
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#1171813

On Thu, Jun 25, 2015 at 07:55:45AM +0800, Jeff Chua wrote:
> On Thu, Jun 25, 2015 at 12:28 AM, Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> > On Thu, Jun 25, 2015 at 12:22:47AM +0800, Jeff Chua wrote:
> 
> >> Both sda and sdb have the same SSD model.
> >
> > That's a bug in your USB bridge chip, odds are it is not reporting the
> > value properly.  There's nothing the scsi core or USB stack can do about
> > this, sorry.  Please complain to the hardware manufacturer.
> 
> There are workaround boot cmdline parameters for other things ... any
> chance to consider  one to fix broken rotational option? I'm not sure
> how many out there are broken, but I really would like a faster way to
> access my USB SSD without waiting for the "disk spinup".

Just like module paramaters, boot command lines are not for device
specific attributes, sorry.  Again, please contact the manufacturer to
get this fixed.  We can't add a quirk for this bridge because it would
not work if you really put a rotational disk behind it.

Given the cheap cost of these types of bridges, I recommend just getting
one that works.

Best of luck,

greg k-h
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#1171867

Am Mittwoch, 24. Juni 2015, 18:41:52 schrieb Greg Kroah-Hartman:
> On Thu, Jun 25, 2015 at 07:55:45AM +0800, Jeff Chua wrote:
> > On Thu, Jun 25, 2015 at 12:28 AM, Greg Kroah-Hartman
> > 
> > <gregkh@linuxfoundation.org> wrote:
> > > On Thu, Jun 25, 2015 at 12:22:47AM +0800, Jeff Chua wrote:
> > >> Both sda and sdb have the same SSD model.
> > > 
> > > That's a bug in your USB bridge chip, odds are it is not reporting the
> > > value properly.  There's nothing the scsi core or USB stack can do
> > > about
> > > this, sorry.  Please complain to the hardware manufacturer.
> > 
> > There are workaround boot cmdline parameters for other things ... any
> > chance to consider  one to fix broken rotational option? I'm not sure
> > how many out there are broken, but I really would like a faster way to
> > access my USB SSD without waiting for the "disk spinup".
> 
> Just like module paramaters, boot command lines are not for device
> specific attributes, sorry.  Again, please contact the manufacturer to
> get this fixed.  We can't add a quirk for this bridge because it would
> not work if you really put a rotational disk behind it.

How about a way to override it in sysfs directly during runtime just for a 
device individually, like choosing an I/O scheduler for example?

> Given the cheap cost of these types of bridges, I recommend just getting
> one that works.

That is an option as well and may educate hardware manufacturers to look a 
bit better at the quality of those devices (at least then Linux market share 
in that market increases).

Thanks,
-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7
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#1171961

On Thu, Jun 25, 2015 at 2:08 PM, Martin Steigerwald <martin@lichtvoll.de> wrote:
> Am Mittwoch, 24. Juni 2015, 18:41:52 schrieb Greg Kroah-Hartman:
>> On Thu, Jun 25, 2015 at 07:55:45AM +0800, Jeff Chua wrote:
>> > On Thu, Jun 25, 2015 at 12:28 AM, Greg Kroah-Hartman
>> >
>> > <gregkh@linuxfoundation.org> wrote:
>> > > On Thu, Jun 25, 2015 at 12:22:47AM +0800, Jeff Chua wrote:
>> > >> Both sda and sdb have the same SSD model.
>> > >
>> > > That's a bug in your USB bridge chip, odds are it is not reporting the
>> > > value properly.  There's nothing the scsi core or USB stack can do
>> > > about
>> > > this, sorry.  Please complain to the hardware manufacturer.
>> >
>> > There are workaround boot cmdline parameters for other things ... any
>> > chance to consider  one to fix broken rotational option? I'm not sure
>> > how many out there are broken, but I really would like a faster way to
>> > access my USB SSD without waiting for the "disk spinup".
>>
>> Just like module paramaters, boot command lines are not for device
>> specific attributes, sorry.  Again, please contact the manufacturer to
>> get this fixed.  We can't add a quirk for this bridge because it would
>> not work if you really put a rotational disk behind it.
>
> How about a way to override it in sysfs directly during runtime just for a
> device individually, like choosing an I/O scheduler for example?
>
>> Given the cheap cost of these types of bridges, I recommend just getting
>> one that works.
>
> That is an option as well and may educate hardware manufacturers to look a
> bit better at the quality of those devices (at least then Linux market share
> in that market increases).

I just needed something. "throwing" those cheap USB3 ... like I've a
bunch of them. It's just a waste... and they are perfectly fast "uas"
interfaces!

Thanks,
Jeff.
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