Nope. Working perfectly for the last couple of days with none of the drives showing any errors. I guess the lesson here is "Don't clean up your workspace" ;-)

Thanks for all your help!

.. m.

I don't. the one drive was showing failure symptoms. It was hanging. Any new symptoms?

Thanks! Any idea of why this all turned so bad so quickly?

 ..m.

As long as an individual disk is not dropping out, you are good to go.

Okay.

Given that everything is now up and going again, with all disks showing "no errors," is there any further action I should be taking? Or are we good to go?

Again, many thanks for your help!

 .. mark.

this is the error you saw:

Dec 06 08:25:45 - SoftRAID Driver: A SoftRAID disk (disk11, SoftRAID ID: 090D4F021312C500) previously encountered a read or write error. This disk should be replaced.

It refers to one of the stripe disks, which had an error in the past. It may be failing, I cannot tell for sure, but it should not be "dropping out" like that.

This is what the log shows about that error: (indicating the disk was hanging/not responding)

Dec 03 14:02:50 - SoftRAID Driver: A disk (disk6, SoftRAID ID: 090D4F021312C500) for the SoftRAID volume "stripes" (disk8) was removed or stopped responding while the volume was mounted and in use.
Dec 03 14:03:39 - SoftRAID Driver: A disk (disk4, SoftRAID ID: 090D4F021312C500) for the SoftRAID volume "stripes" (disk6) was removed or stopped responding while the volume was mounted and in use.
Dec 03 14:03:49 - SoftRAID Driver: A disk (disk13, SoftRAID ID: 090D4F021312C500) for the SoftRAID volume "stripes" (disk17) was removed or stopped responding while the volume was mounted and in use.
Dec 03 15:09:01 - SoftRAID Driver: A disk (disk11, SoftRAID ID: 090D4F021312C500) for the SoftRAID volume "stripes" () was removed or stopped responding while the volume was mounted and in use.

Now it is just getting weird, maybe in a good way. I did the rebuild on the mirror then rebooted the mac, disconnected and reconnected the raid, and the mirror came up clean, no errors. Great. Plugged in stripe-a and says it is missing a disk. Expected. Pushed in stripes-b and it immediated came up with a "Replace Disk" error but when cleared shows the striped volume up and working with no errors. It also reports both disks as clean with no errors. Go figure.

Attached is the report

When you get further, you can post a support file. I can guide you based on that.

Thanks for your help! Making some progress (yeah!)

I pulled both disks for the striped volume and left the two for the mirror. SoftRAID recognizes both disks as good, with "no errors" but the volume as "degraded." I've started a "rebuilding" and am now about 10m I/O requests in without error, so going well so far.

This seems to indicate that the cabling is okay and the system is, at a hardware level, working correctly.

Once the mirror is going correctly (finished the rebuild) I'll plug in the 2nd stripe volume and see what happens. I suspect I'll need to replace at least 1 drive

More updates as they happen

Thanks again

 .. mark

The disks are hanging. whether enclosure, cable or drives is unknown.
What if you only connect one disk? Does it also hang?

Do you have a different Thunderbolt cable to test with?