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How to use a SoftRAID startup volume with High Sierra

If you're using High Sierra, and booting up from a SoftRAID volume, you'll need to follow the steps given in this forum post, since the macOS High Sierra Installer does not recognize SoftRAID volumes as valid startup volumes.

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10.14.6 Supplemental Update SoftRaid Mount Failures
#1
Anyone else encountering mount failures for SoftRaid volumes after applying Apple's 10.14.6 Supplemental Update from today? There's no error of any sort, just a failure of the array to mount after restarting. I can manually force a mount via Disk Utility, but this is still troublesome.
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#2
If you let the system sit for a while, does the volume mount?

My guess is there is directory damage triggered by the update, and the volume is taking a long time to mount because OS X is repairing hte directory. Do you have Disk Warrior?
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#3
DW made things worse unfortunately. Rebuilding the array now—will post results.


(08-27-2019, 11:29 AM)SoftRAID Support Wrote: If you let the system sit for a while, does the volume mount?

My guess is there is directory damage triggered by the update, and the volume is taking a long time to mount because OS X is repairing hte directory. Do you have Disk Warrior?
Reply
#4
Rebuild and restore from backup worked. DW is surprisingly YMMV.

(08-27-2019, 11:29 AM)SoftRAID Support Wrote: If you let the system sit for a while, does the volume mount?

My guess is there is directory damage triggered by the update, and the volume is taking a long time to mount because OS X is repairing hte directory. Do you have Disk Warrior?
Reply
#5
So DiskWarrior run results in a cascade of errors in SoftRaid even on a freshly rebuilt volume—is this normal? If not, it shouldn't be recommended.

(08-27-2019, 11:29 AM)SoftRAID Support Wrote: If you let the system sit for a while, does the volume mount?

My guess is there is directory damage triggered by the update, and the volume is taking a long time to mount because OS X is repairing hte directory. Do you have Disk Warrior?
Reply
#6
If you are referring to "disk errors" when running Disk Warrior, ignore those. The directory is pointing to a non existent location on the disk, causing the error (SoftRAID reports every disk error regardless of cause. but we are going to start suppressing these errors in a future release of SoftRAID)

Disk Warrior is pretty amazing at recovering damaged directories, but it is not 100%. Seems with Mojave some damages caused by system upgrades are beyond the abilities of even this amazing utility. that is why the Preview is important, look at the changes (open a few ransom files also) before committing to the replacement directory.
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#7
Gotcha. Though it's not just modal "disk error" alerts kicked up in the Finder during DW dir replacement, volume becomes flagged in app as well and doesn't go away even after restarts and attempts to Clear IO Errors. Ignore this all?

(08-29-2019, 07:53 AM)SoftRAID Support Wrote: If you are referring to "disk errors" when running Disk Warrior, ignore those. The directory is pointing to a non existent location on the disk, causing the error (SoftRAID reports every disk error regardless of cause. but we are going to start suppressing these errors in a future release of SoftRAID)

Disk Warrior is pretty amazing at recovering damaged directories, but it is not 100%. Seems with Mojave some damages caused by system upgrades are beyond the abilities of even this amazing utility. that is why the Preview is important, look at the changes (open a few ransom files also) before committing to the replacement directory.
Reply
#8
When you use "clear IO errors" these errors should clear. Do they not?
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#9
They don't clear, no. I've tried this twice—this second time on a freshly initialized and rebuilt volume with no files. Notes: my drives are 4x Samsung 970 EVOs in an Express 4M2 and I'm running SoftRaid XT 5.75.

(08-30-2019, 10:12 AM)SoftRAID Support Wrote: When you use "clear IO errors" these errors should clear. Do they not?
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#10
There are errors in the disks tile? Or the volume tile?
When you use "clear IO counters" and clear the errors, what exactly does or does not happen?
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