Hello Everyone,

 

So I ran into a precarious issue today.  My array just put a disk in disconnected state for some reason.  I have had this happen before, and the parity drive seemed to be fine, so I removed the disk from the array, started the array, shutdown the array, put the disk back and it started a rebuild.  Except as soon as the array starts, the system just hangs.

 

Inspected syslog, and it's full of disk0 read error, which is the parity drive.  Took the parity drive out and ran seatoosl on it, and it appears to be dead, it wont even run a smart test on the drive.

 

The drive that the array disconnected is fine, but I do not know if it wiped any of the data. The rebuild process never got past 0%, but I don't know if it attempted to format the drive.

 

Is there anyway I can put that drive back in, get unraid to just read the drive as is, without trying to rebuild it, and then rebuild parity with a new drive?

If that's not possible, how much data did I lose? Did I lose just the data from that one disk, or did I lose the whole array? I think it should just be the data from that disk, but I don't know.

 

Any help or any info you need from me would be appreciated.  Thanks.

Its likely a bad power/data connection.  You could check/replace cables.  Power splitters are also a common issue.  Also you should post diagnostics for the gurus.

1 hour ago, InfInIty said:

Is there anyway I can put that drive back in, get unraid to just read the drive as is, without trying to rebuild it, and then rebuild parity with a new drive?

I would think that the data on that drive is likely to be mostly intact (or at least recoverable).    
 

The first thing would be to see if the drive can be mounted outside the array using the Unassigned Devices plugin).   If so then there is a way to get that dtive back into the array unchanged via the New Config tool.

 

in the worst case I would expect a file recovery utility such as UFS Explorer on Windows would be able to recover most data.

So I think I dodged a bullet.

 

I tried the unassigned devices thing, but I used Encrypted XFS so it would not mount it.  So I used the "New Config Tool" and reset the array.  Put the drive back and put in a new parity drive, and it seems everything is in working order.

 

All my containers are up and running, as of now I am not noticing any major data loss.

 

I do suspect that my SBA card might be a bit flakey or getting hot, so I put a cooler on it for now, going to order 2 new ones as I am at the point that I need additional sata connections to continue to upgrade the server, the first one being adding another parity drive.