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March 21st, 2024 11:26
Predictive failure on HDD
Hi,
I have a R640 server with 4 disks that are configured with RAID5. One of the disks shows predictive failure.
As I still have 2 slots available, can I add a new disk into one of this slots, configure it as hot spare and will this disk then automatically take over once the predictive failing disk really breaks? Or is that just a bad idea instead of replacing it right away?
Thanks!
Andy
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DELL-Charles R
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March 21st, 2024 15:39
Hello,
First make sure you have a validated backup.
I would recommend replacing a pred fail as soon as you are able.
When we have a predictive fail drive that is still an online member of the array, there are 2 things that should be done before pulling and replacing: Using OpenManage Server Administrator (OMSA) or the controller BIOS.
Note: If the drive is already failed then skip these steps and pull and replace the drive. Once rebuild is complete I would recommend run a Consistency check.
1.Consistency check:
In OMSA: Expand Storage>expand controller. Select ‘Virtual Disk’. Choose ‘Check Consistency’ from dropdown and Execute.
2.When completed consistency check then Put drive offline before replacing:
In OMSA: Expand Storage>expand controller>expand connector>enclosure>select physical disks (or array disks). Select the drop down next to hard drive , choose offline and execute.
Remove the drive and install new drive. The rebuild should start automatically once the drive is replaced. If it does not then you can use OMSA or PERC BIOS to set the replacement drive as a hot spare that will make the rebuild begin.
If you did set up a hot spare first then it will start rebuilding when you offline the pred fail drive.