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Rebuild Dell Perc RAID 5 Array

J

J45p3r

2[H]4U
Joined
Jan 2, 2001
Messages
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We have a Poweredge 2450 here at work that has a PERC 3/Si card in it. One of the guys in the shop pulled out one of the disks in RAID5 and now I need to know how to repair the array. If I pull the drive and stick it back in... it doesn't rebuild. Do I need to initialize the drive in the controller configuration? The only time I've had to rebuild a RAID 5 array was with a completely new disk after one had failed so this is new to me and I don't wanna screw it up.

Thanks!
 
Do you guys have openmanage installed? If so, do you use the Dell array manager? You can manually rebuild the array using the array manager, if need be, although it should be rebuilding automatically. Make sure the disk you are using as a replacement is good as well.
 
Rocco123 said:
Do you guys have openmanage installed? If so, do you use the Dell array manager? You can manually rebuild the array using the array manager, if need be, although it should be rebuilding automatically. Make sure the disk you are using as a replacement is good as well.
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The disk shouldn't be bad. It's not a replacement, it was just pulled out and then stuck back in. The box is running Fedora Core 4, is Open Manage available for that?
 
bump

I read that these controllers may have a bug where if you initialize a drive in an array that you might lose (50% chance) all of the data in the array.
 
Well, if it's running Fedora, then it probably doesn't have array manager :). Sorry, I was confused about the fact that you weren't replacing the disk but just putting it back where it was.

Thing confusing thing is that you shouldn't have to rebuild anything. The array is merely in a "degraded" mode, not in a failed mode. Once you throw a disk back in there, it should think for a second and go back to a redundant state.

Here are the things I would try: Upgrade the BIOS, RAID/SCSI BIOS (for the PERC 3), and upgrade the backplane firmware, if possible. The backplane firmware, in the end, is what is responsible for detecting the status of the disks in your array. It could be a back backplane altogether, would be hard to tell. You wouldn't happen to have another 2450 on hand, would you?
 
Ok I'm back in bussiness. Here is what I was able to do.

I pulled the disk in question out and put it in a spare slot on a Dell PowerEdge 4400 that was running Win2000 and had OpenManage installed. I then initialized the disk on that machine and pulled it out. I put it back in the 2450 and it started to rebuild.

Thanks for help!
 
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