Failed HDD in a Raid 1 config

Hi All,

We have a HP server that is has Raid 1 with a failed hard drive. Any direction on how to replace the failed. Is it just a hot swap with a new drive? Reading different ways of going about it online. Please see pic. Much appreciated.

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Casey WeaverManaged Services Windows Engineer IIICommented:
On most default configurations you'll simply remove the old drive, insert the new one, and the rebuild will start itself. If it doesn't, you can mark the new drive there in storage administrator as a global hotspare, and the rebuild will begin automatically with that new drive.

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R@f@r P@NC3RVirtualization SpecialistCommented:

If it is configured in raid 1, you can change the hot disk, once the new disk is inserted, the reconstruction of the disk will start and you can validate it by the tool, since raid 1 works as a disk mirror and all the data it must be copied to the other disks.

I remain attentive to your comments.

noxchoGlobal Support CoordinatorCommented:
If you have backup just replace the failed drive. Or instead of replacing it connect it as standalone to any other system and check it with its vendor made tools. Often it turns out that the HDD has tiny issues which can be fixed.
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Let me add some additional advice that wasn't covered by the others.   As your O/S will be live and active, then any I/O generated by the programs running on the host will compete to get the RAID rebuilt, so shut down services and try not to use the system unless you have a current backup and have actually tested a full bare metal recovery.

You have no parachute, no redundancy left ... so if there are any files you absolutely  can not live without that are not current, back them up first.   A rebuild is one of the highest stress events you can subject to a disk drive, so plan for the worst.

Remember both disks had exact same I/O, on same computer, same environmentals, same duty cycle, same make/model/firmware, probably same manufacturing date.    So if one decides to die, consider the other disk may be in stress as well.   You might want to look at all the logs on the system to see if there are any errors on the surviving disk.
Fred MarshallPrincipalCommented:
Whether you can hot swap or not remains a question.  Either the computer is built for that or it isn't.
If you can't hot swap then you have to bring the machine down in order to replace the failing drive.
Also, in older systems it was necessary to match the drive model when doing a replacement.

If hot swap isn't possible, once the new drive is in place, some systems require that you make the new drive ready during boot time.  So, you have to be there on site to accomplish that if it's necessary.

Otherwise, you've received good advice and pointers already.  The RAID array should rebuild itself once the system is up and running after the replacement and disk integration into the array.
R@f@r P@NC3RVirtualization SpecialistCommented:

If you are in Raid 1, you can make the hot change, and the reconstruction of the disk can be monitored by the tool of your provider.

In the same way, take a backup of everything before making the disc change, in case you are nervous that something could happen.

You have several suggestions and tips that will help you solve the problem.

We remain attentive to your comments.

Fred MarshallPrincipalCommented:
If one takes the age of the computer and the type of RAID controller into account, having RAID 1 doesn't equate to "hot swap".
Just a caution as it will matter to YOU in terms of the process needed to be followed.
But, if hot swap is OK in your system then great!
What vintage is the HP server?
Do the drives have purple release tabs?
Review the info posted above as well.
jaya31Author Commented:
Hi All the server is a dl 380 gen 8. And they do have purple release tabs. We ordered the replacement drive. Once it get here will start the replacement and report back.
jaya31Author Commented:

We had 5 vm's on that box, after considering we decide to get good backups and and perform the hot swap after hours. The rebuild was successful. Thank all for the directions.
R@f@r P@NC3RVirtualization SpecialistCommented:
good afternoon

Excellent, do not forget to describe what was the best assistance you received.

jaya31Author Commented:
Thanks all, appreciate the guidance and the detailed considerations to take into account before proceeding.
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