I´m in need of a little assistance I´m afraid.
I today had one of my drives going in disabled state with the following erros in the Disk log.
 

Nov 5 12:25:21 Skynet kernel: blk_update_request: I/O error, dev sdj, sector 8594112800 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Nov 5 12:25:21 Skynet emhttpd: read SMART /dev/sdj
Nov 5 12:25:21 Skynet kernel: sd 1:0:3:0: [sdj] tag#1307 UNKNOWN(0x2003) Result: hostbyte=0x00 driverbyte=0x08 cmd_age=0s
Nov 5 12:25:21 Skynet kernel: sd 1:0:3:0: [sdj] tag#1307 Sense Key : 0x2 [current]
Nov 5 12:25:21 Skynet kernel: sd 1:0:3:0: [sdj] tag#1307 ASC=0x4 ASCQ=0x0
Nov 5 12:25:21 Skynet kernel: sd 1:0:3:0: [sdj] tag#1307 CDB: opcode=0x8a 8a 00 00 00 00 02 00 3f c1 20 00 00 00 08 00 00
Nov 5 12:25:21 Skynet kernel: blk_update_request: I/O error, dev sdj, sector 8594112800 op 0x1:(WRITE) flags 0x0 phys_seg 1 prio class 0

 

The disk was running fine until today and i haven´t touched or moved the unraid machine in months. Last time i did some upgrades and recabling is also 2 years back.
I was about to try to just re-enable it and do a rebuild (which i think i need to do, right?) but couldn´t find the information on how to do it.
The respective page about re-enabling in the docs seems to be empty.

 

I suppose the drive is fine and it can still be used. if not, that´wouldn´t be the end of the world as i was about to swap in 2 14TB drives to replace the parity and one of the 3TB ones. At least that was the plan.
I got one 14TB already here, the other on is on order and should arrive mid next week.

 

How to move forward here? Any advice is appreciated

Attached my diagnostics for good measure.
 

skynet-diagnostics-20211107-0010.zip

Edited November 6, 20214 yr by Tetsuo

1 minute ago, Tetsuo said:

The respective page in the docs seems to be empty.

What page is this?    Is it part of the documentation accessible via the ‘Manual’ link at the bottom of the GUI or one you found via another route?

This article has a link to Re-enable a drive.
this is then empty though
 

https://wiki.unraid.net/Replacing_a_Data_Drive

Edited November 6, 20214 yr by Tetsuo

1 minute ago, Tetsuo said:

This article has a link to Re-enable a drive.
this is then empty though
 

https://wiki.unraid.net/Replacing_a_Data_Drive

That is an old page - not part of the official documentation accessible via the GUI link.  The procedure is in the Storage Management section of the official documentation.    Having said that for me the link you give shows content.

The link itself does, right. But the next "hop" via "Re-enable the drive" does not. it just goes back to the Troubleshooting category. Thus i couldn´t link it directly.
FWIW i found it by just putting "re-enable" in the search box.

 

So i should just go ahead with "Rebuilding a drive onto itself" described in the documentation i guess as. at least to me, the drive itself looks fine.

You might run an extended SMART test on the disk. You may have to disable spindown on the disk to get the extended test to complete.