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Old 02-09-2005, 02:53 PM   #1
Registered: Aug 2004
Posts: 43

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Recovering software 5 RAID

I have a few questions about software 5 raid.
I created with the diskdruid a raid 5 software array with 5 harddrives eacht 36 gig scsi on my school.
When i got the question about if i want to have any spare i left i at 0 as in the picture.


Now i want to test the array by pulling out a harddisk and replacing it, but how do I rebuild the array ?
Can i0 rebuild the array ? or can i not because i left the spare on 0? and what is the advantage of putting spare on 1?

Please help me out

Last edited by wesleywest; 02-09-2005 at 02:55 PM.
Old 02-09-2005, 03:35 PM   #2
Registered: Aug 2004
Posts: 43

Original Poster
Rep: Reputation: 15
ok i found this so far, and i need to use raidtools:

Well that might occur on a scsi raid controller with the drives on a saf-te back plane. With software raid you will need to replace the failed drive. Create new md partitions on the drive, and do a raidhotadd to the md partitions.

Example I've got disk sda-sde, all disks are the same size and have the same partitioning scheme, disk sdd has failed, and been replaced. I have 3 md partitions md0/sd*1, md1/sd*2, and md2/sd*3

-fdisk -l /dev/sda (figure how the disk should be partitioned)
-fdisk /dev/sdd (configure the new drive as the other drive)
-cat /proc/mdstat (Check out what drive goes where.)
-raidhotadd /dev/md0 /dev/sdd1
-raidhotadd /dev/md1 /dev/sdd2
-raidhotadd /dev/md2 /dev/sdd3
Correct me if i'm wrong but it looks to me that i only need to raidhotadd the disk that was corrupted or replased right ?


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