Hard Drive Failure

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Nobber
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Hard Drive Failure

Post by Nobber »

Hello
Disk 1 has failed in my TS421 with 2 3 4 working in degraded mode, I have installed a new disk and run a file system check and i get an error message saying failed to add disk 1 to the volume. I have
(all 4 disks are showing as good)

Deleted all partitions from the disk
rebooted
Tried to add disk 1 as a single disk - didnt show up in create box

any ideas on next steps
Thank you
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dolbyman
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Re: Hard Drive Failure

Post by dolbyman »

did you hotswap the drive ?
Nobber
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Re: Hard Drive Failure

Post by Nobber »

yes, tried several times
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dolbyman
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Re: Hard Drive Failure

Post by dolbyman »

can you SSH in and do a

Code: Select all

cat /proc/mdstat
post the results back in code wrap tags
Nobber
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Re: Hard Drive Failure

Post by Nobber »

Mmm will need to Google that, I'll get back to you, thank you
Nobber
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Re: Hard Drive Failure

Post by Nobber »

mdstat attachment
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dolbyman
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Re: Hard Drive Failure

Post by dolbyman »

ok the RAID5 is degraded

- remove the new drive
- format the disk (quick format is fine)
- reboot the NAS (it should come up degraded)
- insert the new disk again and the rebuild should start


the same command should give you info about the progress of the rebuild
Nobber
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Re: Hard Drive Failure

Post by Nobber »

Ok I think this is a compatibility issue, I replaced disk 1 with a WD30EZRZ 3.0TB Blue Desk Top Drive...When I put the original disk back in WD 3.TB Red NAS Drive (With a deleted partition it worked almost straight away so it must be a disk problem? Strange thing is I deleted the partition on the original disk and put it back in the NAS and the volume with all 4 disks was availble within in minutes I was expecting it to have to rebuild that HD back into the volume
Nobber
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Re: Hard Drive Failure

Post by Nobber »

Ok thanks for the reply I'll try that later, thanks
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dolbyman
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Re: Hard Drive Failure

Post by dolbyman »

the blue drive should be recognized..it's just not meant for raid use and could fail prematurely (or make the raid slow with long error corrections)

on raid1...all volumes/folders should be visible, even when degraded
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