We had a breif power failure last night and luckily my UPS kept my NAS running long enough so that I could perform a proper shutdown. However after restarting it this morning, one of the drives changed to degraded after 3 hours. I started a re-sync hoping it will fix the problem. Is this an issue someone else has experienced or is it a faulty drive? If it is a faulty drive, it will be the 2nd one to fail in the 15 months I've owned the ReadyNAS.
Model: RN 214
FW: 6.9.3
Here are the last few entries of the log showing the failure:
Thu Aug 30 2018 14:24:46 Volume: Volume Client-Data health changed from Redundant to Degraded.
Thu Aug 30 2018 14:24:39 Disk: Disk Model:TOSHIBA DT01ACA300 Serial:XXX was removed from Channel 2 of the head unit.
Thu Aug 30 2018 11:14:22 System: ReadyNASOS background service started.
Wed Aug 29 2018 20:54:39 System: The system is shutting down.
Thanks in advance!
Model: RN214D43|ReadyNAS 214 Series 4- Bay (4x 3TB Desktop)
What do you see for the disk that was considered bad in the logs e.g. in smart_history.log. disk_info.log should indicate the disk letter (though that might have changed when adding the disk back) and you may see entries for the disk in dmesg.log, kernel.log and/or systemd-journal.log that may also give an indication as to why the disk was considered bad.
I went through the logs you suggested, didn't see anything bad in the logs ofr that drive. The only thing that stood out was in the kernel.log at the time the NAS weas being shut down:
Aug 29 20:55:03 ABC-Inc kernel: al_eth 0000:00:03.0 eth1: al_eth_down Aug 29 20:55:03 ABC-Inc kernel: [eth rx] warn: dma state didn't change to Disable Aug 29 20:55:03 ABC-Inc kernel: [eth rx] warn: failed to change state, error -110 Aug 29 20:55:03 ABC-Inc kernel: al_eth 0000:00:01.0 eth0: al_eth_down Aug 29 20:55:03 ABC-Inc kernel: [eth rx] warn: dma state didn't change to Disable Aug 29 20:55:03 ABC-Inc kernel: [eth rx] warn: failed to change state, error -110 Aug 29 20:55:05 ABC-Inc systemd-shutdown[1]: Sending SIGTERM to remaining processes...
After re-sync it's noting the drive as healthy however.
Yes, the SMART stats do look healthy on all the drives.
It is odd that the NAS detected removal of a drive though, so I suggest you keep an eye on the logs. Configure email alerts if you aren't using them.
Also, I note that you needed to manually shutdown the NAS when the power failed? Is the NAS monitoring the UPS? Normally it would do the shutdown on its own.
