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Mac Pro owners, do you have issues swapping hard drives?
Posted by: M A V I C
Date: December 19, 2016 09:05PM
This Mac Pro seems to be finicky with hard drives. I pulled some out of a 10.6 Hac and the Mac Pro would not recognize them. They wouldn't show up in disk utility, single user mode...

I zapped the pram and let it sit unplugged for a while. Finally it recognizes two of them, but not the third. The third DU just sits on Loading disks for a long time, then eventually says the drive can't be repaired.

Out of all my drives, this one is the least critical - it's just the TM backup drive for another one. So if I need to nuke and repave I can. It just seems odd that this Mac has had a hard time seeing all three drives from the Hac, but hasn't had issues with other drives.

Other than that, the transition is going good. Well, I also need a 3.5 to 5.25 adapter to get a HD in the optical bay. Of course, the set I have for that is a bit too narrow for the Mac Pro, for some reason.




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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: space-time
Date: December 19, 2016 09:08PM
are the drives GUID, APM, MBR?
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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: hal
Date: December 19, 2016 09:29PM
It's gotta be the way they are formatted. I moved hard drives from MP to MP with NO issues. You could even take a pair formatted to RAID-0 in disk utility and move them from MP to MP to MP and every one would be recognized perfectly.

My last MP was a 2010 model and the highest OS used was 10.9.5 I think.
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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: M A V I C
Date: December 19, 2016 09:36PM
Interesting. The two that are now able to map are GUID. However, the Time Machine one is APM.




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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: space-time
Date: December 19, 2016 09:39PM
how did you end up with an APM drive in 2016?
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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: M A V I C
Date: December 19, 2016 09:42PM
I'm not sure. The drive was installed in the Hac in around 2010. It was a Core 2 Quad. Didn't Time Machine used to format drives? I'm having a hard time erasing the APM completely.




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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: space-time
Date: December 19, 2016 09:57PM
6 year old drive, used daily as Time Machine? don't bother reusing it, get a new drive. Faster, cheaper, more reliable.
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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: M A V I C
Date: December 19, 2016 09:59PM
It was in my server which hasn't seen a ton of use. Maybe once a month files were added. There was another drive that was a backup for other stuff, but for the last three years it's seen little use as well.




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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: M A V I C
Date: December 19, 2016 10:22PM
But I can't get this 32KB APM partition to go away. It reports having 3.5TB of files on it, but it's a 2TB drive. So a new one might be in order.




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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: hal
Date: December 19, 2016 10:51PM
can you zero the drive?
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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: M A V I C
Date: December 19, 2016 11:35PM
I've erased it multiple times. There's two partitions, I can't get the second one to go away.




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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: M A V I C
Date: December 19, 2016 11:48PM
Booting from the recover partition didn't work, but using the command line did. So the APM partition is gone, but now it still says there's 852.5MB used on the drive, but 2TB available.

Tried again. This time it says 2TB used. HRmmm...

I wish drive prices would have come down a bunch since the last time I bought.




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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: space-time
Date: December 20, 2016 03:40AM
Quote
M A V I C
Booting from the recover partition didn't work, but using the command line did. So the APM partition is gone, but now it still says there's 852.5MB used on the drive, but 2TB available.

Tried again. This time it says 2TB used. HRmmm...

I wish drive prices would have come down a bunch since the last time I bought.

sounds like you use a recent version of OS and Disk Utility. It worked better in Snow Leopard, they messed up in recent OS versions, I can't recall when it started, but I think somewhere in Mavericks or maybe Yosemite.
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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: MrNoBody
Date: December 20, 2016 06:04AM
Quote
M A V I C
...this Mac has had a hard time seeing all three drives from the Hac...
iirc, you're using a 2009 MP booting from an SSD on a OWC PCIe card & the MP is SATA-2, right?

Any boot-able HDD from a 'hac' will have a modified GPT due to the boot loader alteration of the EFI partition.
I don't think 'erasing' a HDD will solve the conflict.
I discovered the easiest way to reuse such a HDD (or one w/ APM) is to
put it in a USB dock & use DU to partition it as MBR, FAT32; then eject. Remount it to
the desktop & partition as GPT, format it as Mac OS Extended (Journaled).
The HDD should then be OK in any 'real' Mac. (btw, I've only done this in Mavericks or earlier)
There is a method to do the above in Terminal but I can't find the link to the website that explains it (might be @ Lifehacker?).



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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: tlh828
Date: December 20, 2016 06:15AM
MrNoBody's method has worked for me in the past, as well.
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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: Onamuji
Date: December 20, 2016 06:56AM
May not have any particular relevance to this problem, but worth planting in the back of your head:

I've observed that as Mac Pros age, they often develop weird quirks with one or more SATA ports. Drives in a quirky bay may show up as write-protected or throw weird r/w errors or appear to be erased/partitioned with the DU and then re-mount with the same partitioning as before.

Moving the drive to a different bay resolves the problem.



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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: M A V I C
Date: December 20, 2016 09:22AM
Quote
MrNoBody
Quote
M A V I C
...this Mac has had a hard time seeing all three drives from the Hac...
iirc, you're using a 2009 MP booting from an SSD on a OWC PCIe card & the MP is SATA-2, right?

Any boot-able HDD from a 'hac' will have a modified GPT due to the boot loader alteration of the EFI partition.
I don't think 'erasing' a HDD will solve the conflict.
I discovered the easiest way to reuse such a HDD (or one w/ APM) is to
put it in a USB dock & use DU to partition it as MBR, FAT32; then eject. Remount it to
the desktop & partition as GPT, format it as Mac OS Extended (Journaled).
The HDD should then be OK in any 'real' Mac. (btw, I've only done this in Mavericks or earlier)
There is a method to do the above in Terminal but I can't find the link to the website that explains it (might be @ Lifehacker?).

That is what I have. The SSD was wiped, however, and the new install was done in the MP. And the drive I'm having an issue with, was not a boot drive in the Hac. It was only ever used for Time Machine. I was able to use the terminal to nuke the partition so it's gone now.




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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: rz
Date: December 20, 2016 10:02AM
Sorry, nothing to offer here. I've had two Mac Pros in the last 8 years and have yet to have a hard drive fail in either one. Of course, now that I've said that, I expect one to fail soon....
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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: M A V I C
Date: December 20, 2016 10:30AM
Quote
Onamuji
May not have any particular relevance to this problem, but worth planting in the back of your head:

I've observed that as Mac Pros age, they often develop weird quirks with one or more SATA ports. Drives in a quirky bay may show up as write-protected or throw weird r/w errors or appear to be erased/partitioned with the DU and then re-mount with the same partitioning as before.

Moving the drive to a different bay resolves the problem.

I've tried this one drive in both the standard HD slot, as well as plugged into the extra connectors in the optical drive bay. It's had the same issues in both.




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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: clay
Date: December 20, 2016 12:58PM
download something like this: [binaryfruit.com]

See what the health stats look like for the affected drives. There's a free trial of the software, but I found it so useful I ponied up the $20 and bought it. It's not the end all/be all of drive utilities, but it has been something I rely on almost daily to keep tabs on a bunch of different drives.
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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: M A V I C
Date: December 20, 2016 10:13PM
Thanks clay. I just ran that. All of my drives show as OK, except this one. It shows the SMART status as failing, whereas DU says it's verified.

One thing that's odd is three drives were installed at the same time. For power on time, they show:
66 months
70 months
46 months

The first two are even the same brand and model of drive. The first one is the one that's failing. The second one says one issue found. I should probably replace it as well. I might just buy one 4TB drive and but all the data on one drive.




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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: M A V I C
Date: December 20, 2016 10:30PM
Wow, this is entertaining. For the drives, there's a Load Cycle Count. It says the typical load cycle lifetime for a laptop HD is 300,000 to 600,000. My drives
2.4 million - top 1%, it says
270,000 (failing)
7800




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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: Onamuji
Date: December 21, 2016 12:17AM
Quote
M A V I C
Thanks clay. I just ran that. All of my drives show as OK, except this one. It shows the SMART status as failing, whereas DU says it's verified.

DU will not indicate a SMART error until the drive is practically a doorstop. Do not rely on it to tell you when a drive is dying.



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Re: Mac Pro owners, do you have issues swapping hard drives?
Posted by: M A V I C
Date: December 21, 2016 12:29AM
I vaguely recall that from a period in my life where I had more time to think about this sort of stuff. Thanks.




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