Disk Doesn't Unmount
I have two Thunderbay 4 daisy chained to my Mac. I am running macOS 12.1.
When I unmount the volumes, I am getting an error "Disk for SoftRAID Volume Disappeared". The message goes on to tell me that the drives were mounted and in use. I found that strange, so I plugged the drives back in to try again. I unmounted the drives once again. This time I made sure they were unmounted by checking SoftRAID and Disk Utility. Both showed the drives to be unmounted. After unplugging the cable, I received the same message and error.
After unmounting, the drives seemed strange and never went in to their sleep mode (with the red power light). The power light remained blue. I'm not sure if that's normal or not...
Also, while two volumes are being disconnected, the error I get seems to single out my Time Machine volume.
I should note that I tried this on two separate computers, a 2017 iMac (SoftRAID 6.2) and a 13" Macbook Pro M1 (SoftRAID 6.2.1 b3) both running macOS 12.1.
I opened up a support ticket, but I thought I would post here as well in case anyone else has run in to this and might have some insight.
This seems like Time Machine is hanging onto the volume, but unmounting should not trigger a disk eject event. Can you attach a SoftRAID tech support file?
I've been doing a little troubleshooting and found something interesting. My system included two storage volumes, my internal SSD and my Thunderbay 4 RAID 5 (HFS+).
If I include only my laptop's internal SSD in the Time Machine backup, then the Time Machine volume unmounts and everything is good when disconnecting.
However, as soon as I include any folder from my other Thunderbay 4 volume, I get the errors. The issue only seems to happen when I include my other Thunderbay 4 in the Time Machine backup.
I'm not sure if it helps...
@softraid-support I did try the first aid. It was no help.
I have actually moved on from Time Machine. I erased the drive and started using Carbon Copy Cloner for my backup. Everything with the drives are working as expected now.