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Forum Discussion
ReadyNAS Drive Failing?
I have just noticed the status on my readyNAS is showing yellow (degraded), from what I can see it looks like one of my drives is failing (purchased 2 x 4TB drives Sept 2015, so approx 2.5 yrs old). ...
In my view, ~600 reallocated sectors means the disk needs to be replaced. Generally I won't use a disk if it has more than 50 reallocated+pending sectors; and I start watching it closely as soon as I see any reallocated sectors.
So you should replace disk 2. You can use a larger disk, there there will be no storage increase until you upgrade the other one. The capacity rule for XRAID single redundancy is "sum the disks and subtract the largest".
Also, you should back up your data - it is more vulnerable when the volume is degraded (and if the first disk fails during the resync you will lose all your data).
I'm not sure why your volume is still shown as degraded though - can you download your system log zip file, and post mdstat.log? You can't attach it as a file, but you can cut/paste the text.
Hi StephenB,
Thanks for you quick reply, much appreciated.
I left the NAS unplugged overnight and restarted it the morning, attached is the mdstat.log file.
I also dug out the receipt from the NAS & drive purchase, it said they were under a 3yr warranty, so hopefully it’s claimable, have emailed the supplier so will see.
mdstat.log shows one active/working device at the moment (degraded volume, no failed devices and no spares). That's consistent with removing the failed drive and restarting.
It'd be good to make a backup.
Nakiboy wrote:
it said they were under a 3yr warranty, so hopefully it’s claimable, have emailed the supplier so will see.
Western Digital (really all manufacturers) will replace it with a recertified disk. It should be ok, but in my experience they aren't as reliable as a new drive. One option is to get a new one, and either repurpose the recertified drive (put it in a desktop) or the set it aside as a spare.
Also you might look into the advanced replacement option. That's faster, and the shipping cost for me was about what I'd pay anyway for ground shipping.
Thank you again for the reply.
I have received an RMA to return the drive to a supplier agent.
I assume they would check the drive on receipt, would they be able to read any data on it? Is there an easy way to attempt to format the drive within the NAS, i.e remove the good drive and reset the failing one, as opposed to connecting it to a PC and formatting? I would rather there was no readable data on it.
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