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Readynas 316 Volume is degraded (but all disks green)
So I have my system setup for X-Raid 5, Everythings been going good, but all of a sudden I have this volume degraded error. I have lost a disk before and it was pretty obvious that the disk had faile...
In the smart history log I can actually see the old HD that failed and all the errors it had under uncorrectable errors and ATA errors
Under the HD that is shown as removed by the system, it has -1 for ioedc and 1 for cmd timeout, other than that its all 0s
In the Volume log all the errors are also at 0
Check e.g. kernel.log or systemd-journal.log for messages about the disk that is marked as failed.
Sorry I should be clear, the failed disk I referenced in the previous message is a disk that failed had been replaced about a month ago.
As for the disk that is currently in the machine, but the mdstat log is showing as removed, there is no reference to it in the system journal and the kernal log is completely empty.
Its been running fine for about a month or so since I replaced the failed drive, than pow, this message comes up. The drive that failed was 4TB, I replaced it with a 12TB, and that is the drive that the system is showing as removed.
armybill wrote:
... there is no reference to it in the system journal and the kernal log is completely empty. ...
I replaced it with a 12TB, and that is the drive that the system is showing as removed.
If you hot-inserted the drive, you might try a reboot. Occasionally the linux disk drivers will mark the SATA port as down when a disk fails, and in those cases the system won't see the new drive when it is hot-inserted. Alternatively, remove the drive, reboot, and then hot-insert it again.
Note you won't get the full space benefit of the 12 TB unless you already have a 12 TB in the system (the XRAID capacity rule is "sum the drives and subtract the largest").
Ya I know I wont get to use the most of my 12TB. My thinking was (and my thinking could be right out of her), once one drive failed, the others were sure to follow. Ive had this NAS for a number of years and I went through several configurations before going with X-Raid 5, so I feel Ive been pretty hard on the drives and wasn't super surprised when one blew. Assuming the rest will blow soon, I plan on replacing all of them with 12TB as they go.
I did not hot swap the drives, Im not sure if its because I learned to use computers in the 90s, but I am distrustful of all automated processes on computers lol, Even though it should be hot swapable, I never trust it. But in the interst of troubleshooting I did as you described and booted it with the 12TB out and got swapped it in once booted.
Curiously the drive now shows as black rather than blue, indicating it is not part of the raid volume anymore. And of course the volume is still degraded. Can we add this disk back into the volume and rsync it somehow?
Thanks for all the help btw, this community is awesome for answering questions
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