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Hot Swap drive not rebuilding
Hi there - I have a PowerEdge 2970 that has 2 Arrays
1 - 2 Disk Mirror
2 - 4 Disk RAID 5
There was a PF on one of the RAID 5 disks.
A replacement was sourced Dell Hard Drive 600GB SAS Product ID - HUS156060VLS600 (Not same ID as original PF disk - was told it would work fine).
The disk was replaced (Hot Swap) and showed up in OMSA.
I noticed that the status was showing READY and no rebuild took place.
I have found advice on setting the drive as a Hot Spare and it will rebuild. I have also read advice on not doing this as it can cause issues.
I have noticed the size of the new drive is showing smaller than the other drives in the array (536GB instead of 558GB). I presume this may possibly be causing the rebuild not to happen as the disk is not reporting the correct size?
I have also noticed the firmware on the controller is out of date.
My question is, do I update the firmware in the hope it reports the new disk the correct size and rebuild itself or do I order a new disk with the correct Product ID (ST3600057SS).
Many thanks for any advice.
Tom.
theflash1932
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May 8th, 2017 07:00
This is the proper method to rebuild a drive that does not rebuild automatically.
Absolutely not. 99% of the time, this is the only way.
There are many reasons a drive may not rebuild, but if the drive is smaller than other member disks, it will not rebuild.
It is unlikely that updating the controller will help, but it should always be kept up to date. Updating the drive firmware may help though - it "can" change the reported size.
Z3roCool101
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May 8th, 2017 08:00
Thanks for the reply.
Guessing there will be no harm then in trying to set the new drive as a Hot Spare from within OMSA and if it fails to rebuild from there removing it as a Hot Spare and trying another disk (Same Product ID disk).
Don't fancy updating the firmware as server is old and nearing replacement. Will leave for last resort.
theflash1932
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May 8th, 2017 13:00
Should be no danger, but just some friendly advice for future servers you manage ... firmware should be kept up to date, as they typically address stability, reliability, or performance concerns. They are not dangerous to run.