NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Solved
RN314 and high ATA error count on 2 disks
I have a RN314 and I've got high ATA error counts. I have two RAID 1 volumes, each 2x3TB disks. One disk in each volume has been reporting increasing ATA counts. Disk: Detected increasing ATA e...
UNCs and Reallocated Sectors definitely point to the disk. ATA errors relate to the SATA bus, so can either be an issue with the NAS or the disk.
One bad drive can also sometimes cause ATA errors on another channel.
Your data is definitely at risk, so you need to complete a backup ASAP. If you do really have two failing drives (and I think that's most likely), the second could fail during re-sync of the first replacement, which often results in data loss.
I was copying from vol2 to vol1 and in the evening, disk 4 was removed from the array on vol2, but also now vol1 shows the first disk as status unknown, so that's probably failed too - I did see some disk logs showing the disk test status as failed - odd that it's not recognised as failed and therefore degraded the volume.
Anyway, I have almost got all data from vol2 to 1 and then I'll remove disk 1 and swap disk 3 to disk 1 and vol1 data onto the other disk,
Will I need to clean disk 3 before I put it in as disk 1?
I also set up rclone last night and did a sync to google drive with one of the important volumes, so have backed that up ok - although I do have other backups, nice to keep as many as possible
What you want to do first is destroy VOL2 so the OS stops looking for it. Just removing the drives doesn't cause the OS to stop expecting the volume to be there. You may also need to format the drive (there in the NAS via the GUI), but I think the DESTROY is sufficient. The OS should see that VOL1 is missing a drive and automatically start a sync to replace drive 1 with drive 3. There is no need to re-position any drives at this point. But, they'll stay cooler if there is a blank bay between them. So when the resync is complete, you may want to power down and put the drives into whichever bays you desire.
Now in all this, I'm assuming that VOL1 was your first volume, so it's the primary one. If that's not the case, then you do need to do some things via SSH to insure you don't lose your apps and home folders before you destroy VOL2 (see How-to-save-your-apps-when-destroying-your-main-volume-OS6).
Now it's getting a little weirder...
So, yes, vol1 (ata1+2) was the the initial, so all good there.
- All data moved off degraded volume (vol2 - ata3+4)
- Volume destroyed
Now disk 1 - that HAD shown 65k ATA errors reports like this
but after a reboot, the dmesg.log file is showing clear issues with ata1 on sda.
Anyway, I've removed ata4 and formatted ata3 and turned it into a global spare - just doing some additional backups and will remove ata1 and allow ata3 to become part of vol1.
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
