4 ms·
What happens next? Shouldn't the array continue working, albeit with significantly degraded performance?
by trallnag 3y ago
What happens next? Shouldn't the array continue working, albeit with significantly degraded performance?
- bloopernova 3y agoWell, in my sysadmin days we would have test/staging equipment that we'd make sure we knew what would happen when a change was made. But I don't know the details of what really happened, so I can't make a judgement really. If I could edit my previous comment I would, to be less emphatic that someone did something "wrong". It could have been that this particular disk array had different firmware or was faulty. All we know is that something unexpected happened.
- bloopernova 3y agoSorry, I didn't quite answer your question! Yes, the expected behaviour would be for the disks to be initialized. Beyond that, it'd be a configuration setting for what to do with new disks. It could be used to extend the existing LUNs, or added as a new pair in a RAID 10 style setup, or added as new members of a different level RAID. Then it would be up to the sysadmin to extend the LUN, or divide the newly added space among multiple LUNs. Different arrays have different behaviour with new disk. Some only add to offline LUNs. Some do everything online with lower performance, as you said. Even some super expensive enterprise kit will be very easy to break by adding new disk.
- trallnag 3y agoThanks for the insightful answer!