I guess I will start it with the red x. I have already done that before, so it shouldn't make anything worse.

Unassign disk4 before starting to see if the emulated disk mounts.

6 minutes ago, trurl said:

Unassign disk4 before starting to see if the emulated disk mounts.

It appears that it started with an emulated disk. 

 

Should I try mounting it as an unassigned device?

Edited December 20, 20205 yr by openam

No don't mount the actual disk I just wanted to see if the emulated disk mounted after the filesystem repair. Your screenshots don't clear that up though. Post diagnostics

Attached fresh diagnostics

palazzo-diagnostics-20201219-1734.zip

Edited December 20, 20205 yr by openam

Yes, emulated disk4 mounts and shows 3.2TB of data so the repair must have succeeded. And it doesn't look like there were any lost+found from the repair. That is what you would get from rebuilding assuming the rebuild succeeds. But let's don't go there yet.

 

Do you have backups of everything important and irreplaceable from your server? Since it looks like you should have access to all your files now would be a good time to copy anything you want to another computer in case there are further problems with rebuilding.

 

 

Well there was some stuff I had come to grips with loosing. I'm going to try and copy it off to another server. Should I run one of the preclear functions on the new disk in the meantime? If so which preclear option?

Post a screenshot of those preclear options

Clear should be good enough, one cycle, don't skip anything. You can do that while copying things from the server. How much do you plan to copy?

Probably a couple hundred GB. I think I have mose of it already. I guess should I be worried about losing appdata for the dockers?

 

The longest thing will probably be waiting for the preclear to run. It seems like that took half a day last time.

appdata is all on cache. Looks like you also have CA Backup plugin installed so I assume you have appdata backed up to the array. That backup is compressed so you could just copy the backup if you want.

 

I always say you get to decide what is important and irreplaceable. Some things can be recreated or redownloaded if lost. Some things can't.

Well it looks like the preclear is going to be taking a while. I'm at 8% into the the pre-read almost an hour in.

 

I did copy the CA Backup archive to another server. It was much bigger than I thought it would be. Anyways I believe I have all the important/irreplaceable items copied to the other server now. (note to self set up an rsync job between servers).

 

The good news is that I seem to have stopped getting warnings about Seek error rate. I've been copying some stuff off the array, and haven't received one of those warnings for about 3 hours now. I did shut down the box again and reseated the cables again. I pulled the drives out of the hotswap bay, and blew it the dust out with compressed air. Maybe one of those things helped. ¯\_(ツ)_/¯

 

I guess I'll be picking this back up tomorrow. After the preclear what are the next steps. I assume I just stop the array, assign this new drive to disk 4, and start it back up. Is that correct?

2 minutes ago, openam said:

I assume I just stop the array, assign this new drive to disk 4, and start it back up. Is that correct?

Yes. Keep the original disk4 as it is in case there are any problems.

Just posting an update. The read phase of the preclear has completed, and I'm about 22% (2:22:25) through the Zeroing phase. It appears that disks 3 and 6 are now showing has healthy now. I don't think I'll have any problem re-building disk 4 at this time. It looks like it'll probably be the middle of the night or tomorrow before the pre-clear will all be completed.

 

I'm curious if after I install this new 8TB as the new disk 4, if there is any way for me to pull it back out, and use it as a 2nd parity disk? i.e. if I used unbalance and moved all data off of disk 4 is there a way to edit the config, and remove it out of the array? Or something like that?

4 hours ago, openam said:

I'm curious if after I install this new 8TB as the new disk 4, if there is any way for me to pull it back out, and use it as a 2nd parity disk? i.e. if I used unbalance and moved all data off of disk 4 is there a way to edit the config, and remove it out of the array? Or something like that?

Tools - New Config will let you assign any disks however you want and then optionally and by default rebuilds parity based on the new assignments. In the case where you remove a data disk from the array you must rebuild parity.

@trurl thanks for all your help. I'm back up and running, and it has rebuilt disk 4.  

 

 

I guess can I try to run preclear on that old 4TB disk 4 and see if it's working again now too?

10 hours ago, openam said:

try to run preclear on that old 4TB disk 4

sure

It appears from the preclear log that my old 4TB Disk should be fine to use now as well.

preclear_disk_PK2334PBKH867T_12513.txt