Hello, I'm working on a server with a 3w-9550SX controller, with 3x500G disks in a raid-5 and 1x500G hot spare. One night, a disk fails, and the server crashes! Working on the server, I see that many filesystems were destroyed beyond repair!! This was too bad to hear. Some LVM volumes were repaired, others were restored from backup. The bad disk was removed. I learnt that 3ware controllers aren't really high quality, and they probably corrupt the FSs.
Since all disks are same age, I thought I'd buy new disks to replace the old ones. I bought 4x500G barracuda-ES drives, which should be high quality. Here lies my problem. I need to replace the 3 running disks, with 3 new disks, and add an extra one as hot spare. I am scared to do that, because the standard way is to "fail" a disk, and rebuild on a new one, then repeat for the other 2 disks till all 3 are replaced. Now this puts me in a vulnerable situation, if I "fail" a disk, and while rebuilding another disk naturally fails, all data is gone! Is there any other "wise" way to do what I want safely ? I contacted 3w support, and they just insist I should fail/rebuild, but since I don't have much faith in their controllers or the old disks ... any smarter way to do this ? Regards
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