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How to replace a drive in a raid 5

I had one of three hard drives fail on my server. I replaced the drive and did a rescan from the Adaptec Management Console from within windows. It detected the drive but did not start a rebuild. I reboot the server thinking that that would start a rebuild but no luck. I read a post on Adaptec site that said that I need to right click the drive and select add hot spare which was a mistake from what I can tell. Can I delete the hot spare without it affecting the raid and how can I get the raid to add the new hard drive?
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rmills8387
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rmills8387
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1 Solution
 
jamietonerCommented:
Setting the drive as a hotspare should have started a rebuild. Is the replacement drive the same make and model?
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rmills8387Author Commented:
The replacement is the same make and model - Seagate ST336607LC
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Ehab SalemCommented:
Removing the hotspare will not harm your raid.
You might need to inform the controller that you are replacing the defective drive sa that it starts rebuilding it.
But as mentioned above, if you have already a hotspare (before failure) rebuilding starts automatically BUT you do not need to remove the hotspare and out it in place of the defective one, you must leave it in its place.
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andyalderSaggar makers bottom knockerCommented:
Check it's not a Dell OEM disk, these have had the SCSI command sent to them that makes them a tiny bit smaller than the generic disk which would make it too small to be used in the array. If that's happened you need to resize with seatools for dos, but you need a non-RAID controller to do that. I guess you can see the size of the disks in the Adaptec BIOS.
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rmills8387Author Commented:
ehabsalem - It was not a hot spare before. I selected it thinking it would start a rebuild.
andyalder: the drive is a Seagate and is actually showing a little bit larger in size.
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andyalderSaggar makers bottom knockerCommented:
You can't tell if it's OM from the label, although a phonecall to Seagate tech support will confirm whether it was originally OEM'ed or normal retail. Strange that it is a little larger than the other disks, is the firmware level similar?
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Ehab SalemCommented:
a little bit larger won't harm the RAID. It will take the needed space and leave rest unused.
The HD you want to use, did you insert it in the place of the defective one? did you inform the RAID that you are replacing the HD?
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rmills8387Author Commented:
Yes I inserted it in the same place and did a rescan. That is the only way I know how to inform the raid that I replaced the drive. Is there another step that I am missing. I am attaching my raid log files if it will help.
Support.zip
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rmills8387Author Commented:
Reviewing the logs I do see where the drive size is smaller. I need to get my eyes checked because it was right in front of me. I will try to resize as andyalder suggested
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rmills8387Author Commented:
Can I replace the drive with a different model# (ST373455LC - 73.4GB) that is bigger and is a 15K instead of the 10K (ST336607LC 34.2GB) hard drive. It will re-size to the smaller drives?
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Ehab SalemCommented:
yes and the speed doesn't matter
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andyalderSaggar makers bottom knockerCommented:
This keeps happening, it's a pity that Dell don't put their own label on them after they resize them. Several other software products available for resizing apart from SeaTools, but all need a non-RAID HBA. No way to get a RAID controller to pass a raw SCSI command onto a disk I'm afraid.
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