I've just had a notification from my server warning that both of my parity drives have failed.

Looking at the logs can see they both experienced read and write errors at the exact same sector at the same time, which seems a little odd.

 

Both drives have been disabled so now I'm just running with the data drives.

Some advice would be appreciated.

 

 

Quote

Oct 20 04:10:17 nas kernel: ata2.00: configured for UDMA/133
Oct 20 20:14:14 nas kernel: md: disk0 read error, sector=2080407320
Oct 20 20:14:14 nas kernel: md: disk29 read error, sector=2080407320
Oct 20 20:14:14 nas emhttpd: read SMART /dev/sdd
Oct 20 20:14:19 nas emhttpd: read SMART /dev/sdg
Oct 20 20:14:19 nas emhttpd: read SMART /dev/sde
Oct 20 20:14:19 nas emhttpd: read SMART /dev/sdf
Oct 20 20:14:23 nas kernel: md: disk0 write error, sector=2080407320
Oct 20 20:14:23 nas kernel: md: disk29 write error, sector=2080407320
Oct 20 20:15:37 nas webGUI: Successful login user root from 192.168.1.142

 

nas-diagnostics-20241020-2036.zip

Looks more like a power/connection issue, check replace/cables and re-sync parity, if there's a power splitter being used for both, it would be the main suspect.

That's the odd thing. The drives are split across two seperate rails and sata controllers.

I will recheck connection, re-sync and keep an eye on things.

Thanks

 

Update for future self / anyone interested.

 

Parity check failed at 25% after re-assigning the drives. Various read and write errors.

As both drives are using seperate power connectors and were on different sata controllers (and it's unlikely both drives failed at the same sectors simultaneously) I decided it's likely the power supply.

New PSU fitted, parity re-synced and everything has been stable for a few days now.