Hard drive failure during rebuilt - next steps?

[rmurgz]

Hi there,

I have just undertaken an upgrade of the hard drives in my ReadyNAS314 as follows:

* Bays 1 & 2 - 2 x 6TB WD Red Pro - to remain the same

* Bays 3 & 4 - 2 x 2TB WD Red Pro to 2 x 6TB WD Red Pro

I swapped out Bay 3-4 at which point the RAID started to rebuild. I've returned overnight to see a warning that the NAS is degraded and the drive in Bay 1 has disappeared from the 

What I really need help with is:

1. How can I check whether all my data is ok? 

2. How can I check whether this is a drive failure or issue with the NAS. The console displays the volume as missing (rather than corrupted) - image below

3. What to do next!

Many thanks

Richard

[mdgm-ntgr]

Send in your logs (see the Sending Logs link in my sig)

[rmurgz]

Thanks for getting back to me. Will be with you in next 5 minutes.

[mdgm-ntgr]

Looks like a bad disk to me. I can see I/O errors.

Is your backup up to date?

[rmurgz]

Hi mdgm,

Back-ups are up to date though I'd rather not restore from them as it's a bit messay. 

Am not sure in which log you're seeing the I/O errors. 

When I looked at the logs on the ReadyNAS portal it looks like the NAS had finished resyncing with the new drive in bay 3 before the drive in bay 1 failed. Am I safe to stick a new 6tb drive into bay 1 to restore my RAID5 failover or are there bigger issues that have been in play for longer?

Apologies in advance if these questions seem dumb 😞 and thanks again for all your help.

[dmahon1]

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rmurgz wrote: 

When I looked at the logs on the ReadyNAS portal it looks like the NAS had finished resyncing with the new drive in bay 3 before the drive in bay 1 failed. Am I safe to stick a new 6tb drive into bay 1 to restore my RAID5 failover or are there bigger issues that have been in play for longer?

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Looks like you got lucky, the RAID is viable but degraded, and can indeed just swap your remaining new drive with the failed drive 1.