Well I just had a power outage and one of my disks got disabled when the power came back on. I'm just wondering if I should simply rebuild it or replace it. I didn't have any errors with it prior to the power going out.

 

Any and all help would be truly be appreciated.

ST4000DM004-2CV104_ZFN1BT1R-20201111-1823 disk2 (sde) - DISK_DSBL.txt

Edited November 16, 20205 yr by Psycho

Go to Tools - Diagnostics and attach the complete Diagnostics ZIP file to your NEXT post in this thread.

Here you go

knight-diagnostics-20201111-1823.zip

SMART attributes for disk2 look OK and it also has recently passed an extended SMART test. And emulated disk2 is mounted so it should be OK to rebuild to the same disk.

 

Do you know how to proceed?

 

Yeah I found it in the wiki, thanks!

Now when I tried rebuilding it all I get is disk 1 read errors. Disk 2 is still being emulated so now I'm stuck, how do I save most of my data? (I'd imagine that since I have 1 parity drive I will be losing some data)

knight-diagnostics-20201113-1202.zip

Edited November 13, 20205 yr by Psycho

Just to be clear, my question is if 1 drive is emulated and another one is failing, how do I go about to swap out the failing drive with a new one without losing all the data. The emulated drive appears to be find and doesn't show any errors.

SMART for disk1 looked OK in those first diagnostics, but disk1 is not connected in those latest diagnostics.

 

Shutdown, check all connections, power and SATA, both ends, including splitters. Reboot and post new diagnostics.

 

 

here you go

knight-diagnostics-20201113-1657.zip

Still not getting SMART for disk1, though it looks like it's mounted.

 

Looks like docker.img is corrupt and spamming syslog. You shouldn't have system share on the array anyway. Disable dockers in Settings then reboot and post new diagnostics.

 

 

here's the new one

knight-diagnostics-20201113-1715.zip

And I should probably ask how to fix docker.img also

Disk1 SMART not looking very good

Serial Number:    WFN07RK9
ID# ATTRIBUTE_NAME          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
  5 Reallocated_Sector_Ct   PO--CK   100   100   010    -    1040
183 Runtime_Bad_Block       -O--CK   097   097   000    -    3
197 Current_Pending_Sector  -O--C-   100   100   000    -    16
198 Offline_Uncorrectable   ----C-   100   100   000    -    16

Post a screenshot of Main - Array Devices

Figures, problem is I was in the process of rebuilding disk 2. This is after a fresh startup. 

Edited November 15, 20205 yr by Psycho
added description

I get errors on disk 1 after a while

The good news is all disks are mounted so you should be able to copy files off.

Well it's not letting me, errors keep adding up on Disk 1 and files aren't copying over. So how do I go about replacing disk 1 and deal with disk 2 being emulated. I know that I will probably lose some data but how can I save some of it?

Edited November 15, 20205 yr by Psycho
changed to aren't

Do you have a disk to replace disk1?

I do yes, same size

I guess you could try to rebuild disk1 instead of disk2. Maybe data on physical disk2 is OK or mostly.

 

You would replace disk1 then use the invalidslot command to tell it disk1 needs to be rebuilt.

 

 

Just my luck, with 1 hour to go on the Disk 1 rebuild with no errors, I get hit with another power outage. Now disk 2 says:

Quote

Unmountable: No file system

Do I need to do the "Retain current configuration" step again?

knight-diagnostics-20201115-1614.zip

Edited November 15, 20205 yr by Psycho

Post new Diagnostics 

here you go

knight-diagnostics-20201115-1816.zip

According to diagnostics disk1 is the invalid and emulated disk now so if you restart the rebuild that is the one it should begin rebuilding. And in fact, syslog says it had already begun rebuilding disk1 but looks like you cancelled it. It will start over from the beginning.

 

Syslog isnt showing an unclean shutdown though. Is your server on an UPS?

 

SMART for disk2 looks OK. If you want you can try checking the filesystem on disk2 before restarting the rebuild, or you can do that after.

 

https://wiki.unraid.net/Check_Disk_Filesystems#Checking_and_fixing_drives_in_the_webGui

 

 

No UPS (yet)... also getting a second parity drive. You learn something new every time!