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erase boot disk?

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  erase boot disk? J Burns <burns@nospam.com> - 2017-06-07 18:58 -0400
    Re: erase boot disk? nospam <nospam@nospam.invalid> - 2017-06-07 22:19 -0400
      Re: erase boot disk? Wade Garrett <wade@cooler.net> - 2017-06-08 09:28 -0400
        Re: erase boot disk? nospam <nospam@nospam.invalid> - 2017-06-08 10:32 -0400
        Re: erase boot disk? Jolly Roger <jollyroger@pobox.com> - 2017-06-08 15:50 +0000
        Re: erase boot disk? Alrescha <alrescha@gmail.com> - 2017-06-08 22:39 +0000
          Re: erase boot disk? nospam <nospam@nospam.invalid> - 2017-06-08 19:13 -0400
          Re: erase boot disk? Your Name <YourName@YourISP.com> - 2017-06-09 13:23 +1200
          Re: erase boot disk? Wade Garrett <wade@cooler.net> - 2017-06-09 11:09 -0400
          Re: erase boot disk? J Burns <burns@nospam.com> - 2017-06-09 11:10 -0400
            Re: erase boot disk? Jolly Roger <jollyroger@pobox.com> - 2017-06-09 23:36 +0000
              Re: erase boot disk? J Burns <burns@nospam.com> - 2017-06-10 21:54 -0400
                Re: erase boot disk? Jolly Roger <jollyroger@pobox.com> - 2017-06-11 04:51 +0000
                  Re: erase boot disk? J Burns <burns@nospam.com> - 2017-06-11 15:13 -0400
                    Re: erase boot disk? nospam <nospam@nospam.invalid> - 2017-06-11 15:29 -0400
    Re: erase boot disk? J Burns <burns@nospam.com> - 2017-06-25 17:26 -0400
      Re: erase boot disk? Jolly Roger <jollyroger@pobox.com> - 2017-06-25 21:55 +0000
        Re: erase boot disk? J Burns <burns@nospam.com> - 2017-06-25 18:30 -0400

#107498 — erase boot disk?

For years, I've thought the internal drive on my 2012 Mini was slowing. 
  Now XBench shows it to be about half as fast in all categories, as in 
2012. Disk First Aid says it's fine. It says Smart Status is verified. 
I don't recall how to get a smart report.

Before Time Machine, I kept a clone of my boot disk.  IIRC, OSX was 
supposed to defrag as it ran, but sometimes the internal disk would seem 
slower than before. Erasing and restoring from the clone seemed to help.

Would that be a good idea now?  Have I overlooked something?

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#107499

In article <oha081$197$1@dont-email.me>, J Burns <burns@nospam.com>
wrote:

> For years, I've thought the internal drive on my 2012 Mini was slowing. 
>   Now XBench shows it to be about half as fast in all categories, as in 
> 2012. Disk First Aid says it's fine. It says Smart Status is verified. 
> I don't recall how to get a smart report.

completely meaningless.

> Before Time Machine, I kept a clone of my boot disk.

you should still be doing that.

> IIRC, OSX was 
> supposed to defrag as it ran, but sometimes the internal disk would seem 
> slower than before. Erasing and restoring from the clone seemed to help.
> 
> Would that be a good idea now?  Have I overlooked something?

slowdowns are often the sign of impending failure.

what you really should do is replace the internal drive with an ssd.
the difference is staggering.

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#107500

On 6/7/17 10:19 PM, nospam wrote:
> In article <oha081$197$1@dont-email.me>, J Burns <burns@nospam.com>
> wrote:
>
>> For years, I've thought the internal drive on my 2012 Mini was slowing.
>>   Now XBench shows it to be about half as fast in all categories, as in
>> 2012. Disk First Aid says it's fine. It says Smart Status is verified.
>> I don't recall how to get a smart report.
>
SNIP
>
> slowdowns are often the sign of impending failure.
>
> what you really should do is replace the internal drive with an ssd.
> the difference is staggering.
>

I thought it was somewhere between really really difficult and pretty 
much impossible to get at a Mini's innards. Yes, no?

-- 
Never admit anything, even on your death bed. You might unexpectedly 
recover.
					- Jack Reacher

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#107502

In article <ohbjdv$4jb$1@news.albasani.net>, Wade Garrett
<wade@cooler.net> wrote:

> >> For years, I've thought the internal drive on my 2012 Mini was slowing.
> >>   Now XBench shows it to be about half as fast in all categories, as in
> >> 2012. Disk First Aid says it's fine. It says Smart Status is verified.
> >> I don't recall how to get a smart report.
> >
> SNIP
> >
> > slowdowns are often the sign of impending failure.
> >
> > what you really should do is replace the internal drive with an ssd.
> > the difference is staggering.
> >
> 
> I thought it was somewhere between really really difficult and pretty 
> much impossible to get at a Mini's innards. Yes, no?

definitely no. for a 2012 mini, it's trivial. the bottom cover twists
off, then it's a couple of screws to get to the hd/ssd.

<https://regmedia.co.uk/2010/06/17/mac_mini2.jpg>

for the older intel minis, it's a bit more effort, but not particularly
difficult. two putty knives to pop the top, then a bunch of screws to
remove the drive bracket along with some cables, then swap the drive.

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#107504

On 2017-06-08, Wade Garrett <wade@cooler.net> wrote:
>
> I thought it was somewhere between really really difficult and pretty
> much impossible to get at a Mini's innards. Yes, no?

Nah. I've done it with all of the various models through the years since
the very first Mac mini. iMacs are *much* harder and more cumbersome.

-- 
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR

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#107519

Wade Garrett <wade@cooler.net> wrote:

> I thought it was somewhere between really really difficult and pretty 
> much impossible to get at a Mini's innards. Yes, no?

It is "involved".  You have to be patient and methodical.  There are
tutorials online.  I have replaced two mini boot drives, and while
everything survived I do not look forward to doing it again.

-- 
A.

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#107520

In article <ohcjn5$6kt$1@dont-email.me>, Alrescha <alrescha@gmail.com>
wrote:

> 
> > I thought it was somewhere between really really difficult and pretty 
> > much impossible to get at a Mini's innards. Yes, no?
> 
> It is "involved".  You have to be patient and methodical.  There are
> tutorials online.  I have replaced two mini boot drives, and while
> everything survived I do not look forward to doing it again.

it's not involved at all. in fact, it's very easy. 

twist off the bottom cover, remove a few screws to move fan to access
old drive, pull out old drive, put in new drive, put back screws and
fan.

the entire process is about 10-15 minutes.  

the only tricky part is getting the new drive to seat properly.

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#107521

On 2017-06-08 22:39:33 +0000, Alrescha said:
> Wade Garrett <wade@cooler.net> wrote:
>> 
>> I thought it was somewhere between really really difficult and pretty
>> much impossible to get at a Mini's innards. Yes, no?
> 
> It is "involved".  You have to be patient and methodical.  There are
> tutorials online.  I have replaced two mini boot drives, and while
> everything survived I do not look forward to doing it again.

Thanks to the moron Johnny Ive, pretty much everything Apple makes 
these days is "involved" when you try to open it up.  :-(

It'll be "interesting" to see what happens with the next Mac Pro which 
is supposed to be "modular".

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#107528

On 6/8/17 6:39 PM, Alrescha wrote:
> Wade Garrett <wade@cooler.net> wrote:
>
>> I thought it was somewhere between really really difficult and pretty
>> much impossible to get at a Mini's innards. Yes, no?
>
> It is "involved".  You have to be patient and methodical.  There are
> tutorials online.  I have replaced two mini boot drives, and while
> everything survived I do not look forward to doing it again.
>

Regretfully, patience is not my long suit!

I've got an aging though still fully satisfactory iMac- though 
periodically suffer from a bout of I-wanna-new-computeritis and think 
about replacing it.

Being a keyboard-in-the-lap/big monitor kinda guy, Macbooks don't have 
any appeal to me. I've thought about saving some dough with a Mac Mini 
though.

-- 
I fear the day technology will surpass our human interaction. The world 
will have a generation of idiots.
				- Albert Einstein

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#107529

On 6/8/17 6:39 PM, Alrescha wrote:
> Wade Garrett <wade@cooler.net> wrote:
>
>> I thought it was somewhere between really really difficult and pretty
>> much impossible to get at a Mini's innards. Yes, no?
>
> It is "involved".  You have to be patient and methodical.  There are
> tutorials online.  I have replaced two mini boot drives, and while
> everything survived I do not look forward to doing it again.
>
I'd try it if I had a backup Mac more recent than G4. As it is, I'd be 
in a jam if my Mac were wrecked or just disabled for a few days.

Maybe it's time to get a 2014 and make my 2012 my backup. I haven't done 
it because the HDD looks about as slow as mine.  Now I see the $699 
model can have a 256 GB SSD instead of a 1 TB HDD. The site says you can 
design your own, but I don't see how.

This ADATA SE730 isn't working out. This morning, the computer crashed 
on wakeup, and the first restart never got to the apple. Then it worked 
until I shut it down.  When I started, it would shut off.

I started on the internal drive.  Twice, it said I'd disconnected the 
SSD without ejecting.  To the contrary, before starting, I'd made sure 
the plugs were tight.

I have read complaints that it comes with a shoddy cable. The fact that 
in five days they haven't responded to my TRIM question, suggests that 
the problem is with the company, not just the cable.

New Mac, install internal SSD, better brand of external SSD.  Decisions, 
decisions...

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#107535

On 2017-06-09, J Burns <burns@nospam.com> wrote:
>
> Maybe it's time to get a 2014 and make my 2012 my backup. I haven't done 
> it because the HDD looks about as slow as mine.  Now I see the $699 
> model can have a 256 GB SSD instead of a 1 TB HDD. The site says you can 
> design your own, but I don't see how.

Design your own what? Fusion Drive? You can create your own Fusion Drive
composed of any size SSD and hard drive you want by issuing a few
terminal commands. I replaced the DVD drive in my 17-inch MacBook Pro
with a hard drive and put an SSD in the normal hard drive bay to create
a 977GB startup drive that's speedy and has lots of space - best of both
worlds on a laptop. Works great! : )

> This ADATA SE730 isn't working out. This morning, the computer crashed 
> on wakeup, and the first restart never got to the apple. Then it worked 
> until I shut it down.  When I started, it would shut off.
>
> I started on the internal drive.  Twice, it said I'd disconnected the 
> SSD without ejecting.  To the contrary, before starting, I'd made sure 
> the plugs were tight.
>
> I have read complaints that it comes with a shoddy cable. The fact that 
> in five days they haven't responded to my TRIM question, suggests that 
> the problem is with the company, not just the cable.

Sounds like crap ware. Hope you didn't pay too much for it!

> New Mac, install internal SSD, better brand of external SSD.  Decisions, 
> decisions...

If it were me, I'd install a new internal SSD, or if I wanted to do
something without spending money, I'd put a spare 2.5-inch hard drive I
have sitting around in there. Then again if money was no object, a new
Mac is always hard to pass up. : )

-- 
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR

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#107574

On 6/9/17 7:36 PM, Jolly Roger wrote:
> On 2017-06-09, J Burns <burns@nospam.com> wrote:
>>
>> Maybe it's time to get a 2014 and make my 2012 my backup. I haven't done
>> it because the HDD looks about as slow as mine.  Now I see the $699
>> model can have a 256 GB SSD instead of a 1 TB HDD. The site says you can
>> design your own, but I don't see how.
>
> Design your own what? Fusion Drive? You can create your own Fusion Drive
> composed of any size SSD and hard drive you want by issuing a few
> terminal commands. I replaced the DVD drive in my 17-inch MacBook Pro
> with a hard drive and put an SSD in the normal hard drive bay to create
> a 977GB startup drive that's speedy and has lots of space - best of both
> worlds on a laptop. Works great! : )

Apple calls it ordering a customized Mac.  I went back to the site and 
found out how. The $700 Mini comes with an HDD that looks about as slow 
as mine. With fusion, it's $900.  With just a 256k flash, it's also $900!

I might buy a second Mac so I'll dare tinker inside, like you.

>
>> This ADATA SE730 isn't working out. This morning, the computer crashed
>> on wakeup, and the first restart never got to the apple. Then it worked
>> until I shut it down.  When I started, it would shut off.
>>
>> I started on the internal drive.  Twice, it said I'd disconnected the
>> SSD without ejecting.  To the contrary, before starting, I'd made sure
>> the plugs were tight.
>>
>> I have read complaints that it comes with a shoddy cable. The fact that
>> in five days they haven't responded to my TRIM question, suggests that
>> the problem is with the company, not just the cable.
>
> Sounds like crap ware. Hope you didn't pay too much for it!

I didn't exercise due diligence. I bought it on impulse because of the 
price and good customer reviews. In fact, there weren't many. After I 
bought it, I found a magazine review calling it slow and overpriced. I 
discovered that it usually costs much more than I paid.

My defect seems to be the C port, not the cable. Maybe I won't have to 
pay to ship it back.
>
>> New Mac, install internal SSD, better brand of external SSD.  Decisions,
>> decisions...
>
> If it were me, I'd install a new internal SSD, or if I wanted to do
> something without spending money, I'd put a spare 2.5-inch hard drive I
> have sitting around in there. Then again if money was no object, a new
> Mac is always hard to pass up. : )
>
I  haven't erased my internal drive, but twice I've used CCC to update 
it from the external clone before I booted with the internal HDD.  Each 
time, it took 4 minutes to get the login screen. I guess booting 
required files to be rewritten. It seems quicker than before, even if 
Xbench says it's just as slow. Benchmarks sent in for this HDD have 
shown a wide range of speeds for this drive in a Mini, so I guess it's 
complicated.

The going price for the Samsung T3 is less than the special price I paid 
for the Adata, and it's vastly more popular. Mac owners commend it 
highly.  One got a big bargain for a new iMac in 2016.  The weak point 
was the HDD. He boots with a T3 and loves it.

Another Amazon reviewer made a youtube video about it. A 1980's Mac is 
visible behind him. He found the T3 so fast and reliable that he bought 
several for his outdoor video work with a Macbook. Samsung includes Mac 
software that makes it really fast, as well as instructional software.

To his surprise, the benchmarks for his first one got faster after he'd 
used it awhile. I think Samsung calls their TRIM method "remap."

That reviewer uses a T3 for his Windows boot when he wants to play 
Windows games on his Mac.

Some have complained that the C connector on an SSD with USB 3.1, can 
come loose easily. They say Samsung has designed an especially secure port.

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#107575

On 2017-06-11, J Burns <burns@nospam.com> wrote:
> On 6/9/17 7:36 PM, Jolly Roger wrote:
>> On 2017-06-09, J Burns <burns@nospam.com> wrote:
>>>
>>> Maybe it's time to get a 2014 and make my 2012 my backup. I haven't done
>>> it because the HDD looks about as slow as mine.  Now I see the $699
>>> model can have a 256 GB SSD instead of a 1 TB HDD. The site says you can
>>> design your own, but I don't see how.
>>
>> Design your own what? Fusion Drive? You can create your own Fusion Drive
>> composed of any size SSD and hard drive you want by issuing a few
>> terminal commands. I replaced the DVD drive in my 17-inch MacBook Pro
>> with a hard drive and put an SSD in the normal hard drive bay to create
>> a 977GB startup drive that's speedy and has lots of space - best of both
>> worlds on a laptop. Works great! : )
>
> Apple calls it ordering a customized Mac.

Okay. It's called build-to-order in the industry. That's not what is
commonly understood as "designing your own", just so you know. ; )

> I went back to the site and 
> found out how. The $700 Mini comes with an HDD that looks about as slow 
> as mine. With fusion, it's $900.  With just a 256k flash, it's also $900!

Flash is expensive, but is way faster and better than spinning rust,
IMHO. You can always order it with the HD, and then upgrade the HD to
flash-based storage later on if you want to increase the life of the
machine. The difference in speed between a solo HD and a Fusion Drive or
completely flash-based storage is huge. 

> I might buy a second Mac so I'll dare tinker inside, like you.

If you can follow the instructions on iFixit, there's really nothing to
it but patience and a steady hand. : )

>>> New Mac, install internal SSD, better brand of external SSD.  Decisions,
>>> decisions...
>>
>> If it were me, I'd install a new internal SSD, or if I wanted to do
>> something without spending money, I'd put a spare 2.5-inch hard drive I
>> have sitting around in there. Then again if money was no object, a new
>> Mac is always hard to pass up. : )
>>
> I  haven't erased my internal drive, but twice I've used CCC to update 
> it from the external clone before I booted with the internal HDD.  Each 
> time, it took 4 minutes to get the login screen. I guess booting 
> required files to be rewritten. It seems quicker than before, even if 
> Xbench says it's just as slow. Benchmarks sent in for this HDD have 
> shown a wide range of speeds for this drive in a Mini, so I guess it's 
> complicated.
>
> The going price for the Samsung T3 is less than the special price I paid 
> for the Adata, and it's vastly more popular. Mac owners commend it 
> highly.  One got a big bargain for a new iMac in 2016.  The weak point 
> was the HDD. He boots with a T3 and loves it.
>
> Another Amazon reviewer made a youtube video about it. A 1980's Mac is 
> visible behind him. He found the T3 so fast and reliable that he bought 
> several for his outdoor video work with a Macbook. Samsung includes Mac 
> software that makes it really fast, as well as instructional software.

I'd much rather replace an internal drive than have an external drive
permanently hanging off the side of the computer. I wonder if that T3
enclosure has an EVO inside, or what? The Samsung EVO usually gets good
ratings on Amazon: 

<https://www.amazon.com/dp/B00OAJ412U/ref=twister_B00PRDMHLU?_encoding=UTF8&psc=1>

-- 
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR

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#107576

On 6/11/17 12:51 AM, Jolly Roger wrote:
> On 2017-06-11, J Burns <burns@nospam.com> wrote:
>
>> I might buy a second Mac so I'll dare tinker inside, like you.
>
> If you can follow the instructions on iFixit, there's really nothing to
> it but patience and a steady hand. : )
>

I believe that's where I saw what I'd be getting into, to increase the 
memory of my G4 Mini to 2 GB. Popular wisdom said it would make a big 
difference, but it didn't pan out for me.

I believe that's where I saw what it would take to change the HDD in 
that Mini. The connector for the HDD was new to me. IIRC, it would plug 
in when reversed.  Not remembering how it had come out, I tried it both 
ways and took my best guess. It wouldn't boot.  Disassembly was easier 
the second time. I reversed the connector and found that I hadn't caused 
electrical damage.

I don't recall any popular wisdom to change to another 5400 rpm disk, 
but it made a big improvement in speed, as I'd imagined from the specs 
while shopping. It also used less power, which would mean less 
temperature change and longer computer life. IIRC, it had been available 
and reasonably cheap when that Mini came out.  I wondered if Apple had 
used a slow drive to make iMacs more appealing to those attracted by the 
Mini's price.

When the fan of my 2012 began running above an idle more than usual, 
iFixit told me how to remove it. I cracked the shroud removing it. I 
decided to use a vacuum cleaner to suck the dirt out of the fan instead 
of blowing it in. I was aware that a vacuum cleaner can ruin a fan by 
overspeeding it and that rushing air can cause a static buildup. IFixit 
had no warning.

Reinstalling the shroud was a puzzle. When I figured it out, I found 
that the correct position held the crack closed. A broken or wrongly 
installed shroud would have changed the airflow, possibly causing 
certain parts to fail.

I had to check iFixit, then perform these operations by remembering what 
I'd seen. With a second Mac, I could have looked at photos when I 
wondered which way to plug in the new HDD.

With a second Mac, I could have looked at the shape of the shroud when 
something kept it from lifting out as expected.  That way, I could have 
avoided damage. With a second Mac, I could have seen how to position it 
to reinstall.

If attempted servicing had put my only Mac out of commission, I would 
have been out of touch with banking, utilities, retailers, and all kinds 
of information sources.


> I'd much rather replace an internal drive than have an external drive
> permanently hanging off the side of the computer. I wonder if that T3
> enclosure has an EVO inside, or what? The Samsung EVO usually gets good
> ratings on Amazon:
>
> <https://www.amazon.com/dp/B00OAJ412U/ref=twister_B00PRDMHLU?_encoding=UTF8&psc=1>
>
The T1 used the 850 EVO.  For 500 GB and up, the T3 uses the K9DUGB8S7M, 
not seen before.  I don't know what the 250 GB version uses.

<http://www.electronicproducts.com/Samsung_SSD_T3-whatsinside_text-196.aspx>

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#107577

In article <ohk4i4$d1c$1@dont-email.me>, J Burns <burns@nospam.com>
wrote:

> >> I might buy a second Mac so I'll dare tinker inside, like you.
> >
> > If you can follow the instructions on iFixit, there's really nothing to
> > it but patience and a steady hand. : )
> >
> 
> I believe that's where I saw what I'd be getting into, to increase the 
> memory of my G4 Mini to 2 GB. Popular wisdom said it would make a big 
> difference, but it didn't pan out for me.

the maximum memory for a powerpc mac mini is 1 gig.

<http://www.everymac.com/systems/apple/mac_mini/faq/mac-mini-g4-upgrade-
processor-memory-hard-drive.html#ram>

> I believe that's where I saw what it would take to change the HDD in 
> that Mini. The connector for the HDD was new to me. IIRC, it would plug 
> in when reversed. 

no it won't, but even if it did, the screw holes won't line up and you
won't be able to put it back together.

> Not remembering how it had come out, I tried it both 
> ways and took my best guess. It wouldn't boot. 

then you did something else wrong.

> Disassembly was easier 
> the second time. I reversed the connector and found that I hadn't caused 
> electrical damage.

that's good.

> I don't recall any popular wisdom to change to another 5400 rpm disk, 
> but it made a big improvement in speed, as I'd imagined from the specs 
> while shopping. It also used less power, which would mean less 
> temperature change and longer computer life. IIRC, it had been available 
> and reasonably cheap when that Mini came out.  I wondered if Apple had 
> used a slow drive to make iMacs more appealing to those attracted by the 
> Mini's price.

the main reason would be thermal. a 7200 rpm drive typically is warmer.

> When the fan of my 2012 began running above an idle more than usual, 
> iFixit told me how to remove it. I cracked the shroud removing it. I 
> decided to use a vacuum cleaner to suck the dirt out of the fan instead 
> of blowing it in. I was aware that a vacuum cleaner can ruin a fan by 
> overspeeding it and that rushing air can cause a static buildup. IFixit 
> had no warning.

a vacuum cleaner won't have any effect on the fan.

> Reinstalling the shroud was a puzzle. When I figured it out, I found 
> that the correct position held the crack closed. A broken or wrongly 
> installed shroud would have changed the airflow, possibly causing 
> certain parts to fail.

it goes back just as easy as it comes out.

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#107652

On 6/7/17 6:58 PM, J Burns wrote:
> For years, I've thought the internal drive on my 2012 Mini was slowing.
>   Now XBench shows it to be about half as fast in all categories, as in
> 2012. Disk First Aid says it's fine. It says Smart Status is verified. I
> don't recall how to get a smart report.
>
> Before Time Machine, I kept a clone of my boot disk.  IIRC, OSX was
> supposed to defrag as it ran, but sometimes the internal disk would seem
> slower than before. Erasing and restoring from the clone seemed to help.
>
> Would that be a good idea now?  Have I overlooked something?

It worked great.  What took minutes, takes seconds now.

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#107655

On 2017-06-25, J Burns <burns@nospam.com> wrote:
> On 6/7/17 6:58 PM, J Burns wrote:
>> For years, I've thought the internal drive on my 2012 Mini was slowing.
>>   Now XBench shows it to be about half as fast in all categories, as in
>> 2012. Disk First Aid says it's fine. It says Smart Status is verified. I
>> don't recall how to get a smart report.
>>
>> Before Time Machine, I kept a clone of my boot disk.  IIRC, OSX was
>> supposed to defrag as it ran, but sometimes the internal disk would seem
>> slower than before. Erasing and restoring from the clone seemed to help.
>>
>> Would that be a good idea now?  Have I overlooked something?
>
> It worked great.  What took minutes, takes seconds now.

What worked great, exactly?

-- 
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR

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#107658

On 6/25/17 5:55 PM, Jolly Roger wrote:
> On 2017-06-25, J Burns <burns@nospam.com> wrote:
>> On 6/7/17 6:58 PM, J Burns wrote:
>>> For years, I've thought the internal drive on my 2012 Mini was slowing.
>>>    Now XBench shows it to be about half as fast in all categories, as in
>>> 2012. Disk First Aid says it's fine. It says Smart Status is verified. I
>>> don't recall how to get a smart report.
>>>
>>> Before Time Machine, I kept a clone of my boot disk.  IIRC, OSX was
>>> supposed to defrag as it ran, but sometimes the internal disk would seem
>>> slower than before. Erasing and restoring from the clone seemed to help.
>>>
>>> Would that be a good idea now?  Have I overlooked something?
>>
>> It worked great.  What took minutes, takes seconds now.
>
> What worked great, exactly?
>
Clone internal drive to external drive.

Boot from external drive.

Erase internal drive, formatting with GUID as before.

Clone from external drive.

Boot from internal drive.  Greased lightning!

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