SoftRAID Disk Error

Clear the IO counters on the volume (errors only).

The disks ejected from a thunderbolt chip crash. (possibly enclosure, cable or computer can trigger this). the drives instantly power off, which causes the error.

Try running Disk Utility "first aid" on your volumes in case there is any damage. There are no repair tools if an APFS volume suffers serious directory damage. I still do not know how effective the First Aid is, but cannot hurt. APFS is more robust than HFS, but when there is a problem, the only recourse is trying a recovery utility like Disk Drill (which now suports APFS) to copy your data off.

@softraid-support

Thank you for your reply. I cleared the I/o counter.

But Disk Utility doesn't seem to work on those volume. It immediately produces a warning saying that the verification failed. 

I tried running it even on another volume I have which had no I/o counter errors. I don't think Disk Utility works on these.

Affected volume seem to work properly now. I have data backing up twice a day on a separate Thunderbolt volume, so I am not as worried to recover lost data with Disk Drill as I am to make sure I can continue using my Thunderbolt Drives after clearing the I/o counter without having to replace any of them or do any other kind of checks.

Could you please confirm there's nothing else I should be doing?

@francesco

Not much else you can do, although I would not think Disk Utility would fail repairing an APFS volume that is mounted and working. Seems like on your end you are doing the correct things.

If you want to send me some data, I can have this investigated at Apple.

What I would need is the following:

Run first aid in Disk Utility. Save the log from First Aid

Run this command in Terminal:

sudo sysdiagnose -f ~/Desktop/

Run this command in Terminal:

(It will generate a large file)

Save a System profile report (about this mac menu)

Save a SoftRAID Tech Support file

Lastly, I need the beginning of your volume, so we can send this to Apple. (Only Apple employee would have access to this data, we will delete it upon sending)

Run SoftRAID.

Expand the volumes tile, and observe the volume Identifier. It may be something like disk6 replace the number accordingly:

sudo  dd bs=1m count=100 if=/dev/rdisk6 of=~/Desktop/Francesco

When it saves this file, right click and "Compress". It should reduce this file dramatically.

let me know when you have all this, I will have you send it to me via a file upload service.

I believe this will assist Apple to make a better "repair" process when running Disk First Aid.