RAID 6 and hot swap
- Thread starter NdridCold
- Start date
But theoretically it can be done?
Also have another question. Little different scenario. Still have a RAID 6 but only one failed drive with another showing signs of failure, so:
PD1= Failed Firmware State
PD2- Media errors but not in a failed firmware state
Question is would PD2, if hot swapped be rebuilt from parity even though its technically not a failed drive or if I want to replace that drive would I need to shut down the server, clone the drive and stick it back in? Or just wait until it completely goes belly up then swap it out?
Also have another question. Little different scenario. Still have a RAID 6 but only one failed drive with another showing signs of failure, so:
PD1= Failed Firmware State
PD2- Media errors but not in a failed firmware state
Question is would PD2, if hot swapped be rebuilt from parity even though its technically not a failed drive or if I want to replace that drive would I need to shut down the server, clone the drive and stick it back in? Or just wait until it completely goes belly up then swap it out?
Yes, it can be done.
If you have a drive that is acting up, replace it and let it rebuild. The whole thing with raid, is that it is high availability(of the data) - you shouldn't have to power down(and remove access to data) because of a single disk problem.
If you have a drive that is acting up, replace it and let it rebuild. The whole thing with raid, is that it is high availability(of the data) - you shouldn't have to power down(and remove access to data) because of a single disk problem.
DO NOT attempt to rebuild a RAID 6 array with a drive that has media errors included.
It WILL cause inconsistent parity problems.
Assuming you have a backup, you have 2 safe options.
1. Remove both unstable drives and rebuild 1 at a time to 2 spares.
2. Remove both unstable drives, get a 100% sector by sector image from the drive with media errors on to a spare, then replace both drives to do a rebuild.
If you DON'T have a independent dedicated backup, then you have 1 safe option:
Remove all drives and make sector by sector images and then proceed to the above steps for rebuild.
It WILL cause inconsistent parity problems.
Assuming you have a backup, you have 2 safe options.
1. Remove both unstable drives and rebuild 1 at a time to 2 spares.
2. Remove both unstable drives, get a 100% sector by sector image from the drive with media errors on to a spare, then replace both drives to do a rebuild.
If you DON'T have a independent dedicated backup, then you have 1 safe option:
Remove all drives and make sector by sector images and then proceed to the above steps for rebuild.
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