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Old 05-01-2008, 03:32 AM   #1
edgjerp
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Registered: Dec 2004
Location: Trondheim, Norway
Distribution: kubuntu 10.04
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recreate md-raid


I just reinstalled my system. how can I recreate my md raid sets without losing data? I have a copy of my old mdadm.conf.

/home is on one of these sets.

one problem is that my p-ata disks now use scsi drivers like my sata disks, so names have changed

searching have revealed that --assume-clean is part of the solution, but I am unsure of what more I need to do.

I have 3 arrays, all are good.

Last edited by edgjerp; 05-01-2008 at 04:14 AM. Reason: more info
 
Old 05-01-2008, 05:43 AM   #2
edgjerp
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I think I found a recipe that will work. the only thing I need now is to match the uuid values in the old mdadm.conf to the partitions that constitute the arrays, so I get the order correct. (I have figured out which partitions go to each array as they are of different size (4 partitions of exactly same size in each array))

can I just assume that the new names were given in the same order as before? (hda->sda, hdb->sdb, ... sda->sdd, etc.) or is the partition that qtparted reads an ext3 filesystem the first one? the old partitions were included alphabetically in the arrays

do I risk irreversibly harming my arrays if I get this wrong?

Last edited by edgjerp; 05-01-2008 at 06:06 AM.
 
Old 05-01-2008, 04:26 PM   #3
edgjerp
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I took a guess, it worked perfectly.
 
Old 05-01-2008, 04:45 PM   #4
unSpawn
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Congrats on doing that all by yourself.
 
  


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