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Problems with SSHD drives and High Sierra

@danj I'm still having a lot of problems with customers coming in with Seagate SSHD drives that have updated to High Sierra. Some are the older Seagate drives and some the FireCuda drives. How should these drives be treated or fixed?

The latest came in today and the drive would not format at all except for the 128 GB Boot camp partition. The rest of the drive does not show up. Disk Utilities would do the 128 (which was MS DOS Fat into APFS) it also will not go back to another format. Tech Tools Pro 10 failed at partition repair. I am trying my first install and Time Machine restoration with Mojave.

This problem has quickly become my #1 problem and I am not getting it fixed. I wipe the drives, do a full fresh install of High Sierra, get it all set up and it’s running fine, for a month or two and then they are back in the shop.

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@mayer - Are you sure the issue is within the SSHD drive? Could their be external forces at play here, like is the system plugged into a surge suppressor or better yet a UPS?

Are these single drive’s systems or dual? Are these just the 2.5” drives or are you facing issues with the iMac’s with 3.5” drives?

If these are dual drive configs in MacBook Pro’s what are the exact models? I personally don’t like dual drive configs on MacBook Pro’s as there are only a few that work reliably given the issues in many.

Are you using any other disk tools besides Apples Disk Utility? I often use Drive Genius when DU fails me.

You also appear to be using GUID/APFS on these drives, I wouldn’t! I would stick with GUID/HFS+ (Journaled). Even on SSD’s as there is still no APFS solution for SATA based drives (HD/SSD) that in my opinion is stable in High Sierra.

I’m just testing out Mojave on one system but as Apple won’t support it on older non-metal systems we are in a bit of a rock and a hard place. Sure, I can force it onto a older system but I try not to get into that grey space with customers systems.

You posted a similar issue about a year ago and at the time I had thought you were going to contact Seagate to see what they said. Did you get anything out of them?

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This is still the same problem I was having last year. Seagate was no help, they wanted all kinds of documentation be able to return the drives. They have all been single drive machines. Mainly with 2011-12 MacBook Pros but a few 3.5" drives on iMac 2011-12 machines.

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@mayer - What does the drives S.M.A.R.T. error report tell you if anything?

Here's a bit more on it Check S.M.A.R.T. Status with CrystalDiskInfo using a Windows system but you can also use Disk Utility to get a Go/No Go reading How to Check SMART Status on Mac Hard Drives or you can use DriveDX which is what I use.

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Here's a bit more on why I don't like APFS on platter drives independent of the SATA interface issues: Using APFS on HDD's And Why You Might Not Want To This also holds true with SSHD's as well.

Here's some performance data: macOS High Sierra APFS Performance is Inferior to HFS on Apple’s Fastest SSD: all cost, no benefit, at least not yet

Here's a good dialog with Larry O'Connor of OWC on why he does not recommend APFS on HDD's but recommends sticking with HFS+ as well! Larry O’Connor: Trends in Storage Technology

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mayer wird auf ewig dankbar sein.
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