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Old 08-13-2009, 01:45 AM   #1
Registered: Feb 2007
Posts: 386

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RAID5, failed 3 out of 5.

For the mdadm RAID5 set up using 5 disks, if the 2 disks failed, can we still retrieve the data?
mdadm assemble from the 3 disks does not work, so i guess I cannot add the new disks using mdadm, right?
Old 08-13-2009, 01:53 AM   #2
Registered: Feb 2008
Distribution: Fedora,RHEL,Ubuntu
Posts: 661

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Have you specified number of spare disk, if not. I think you will not recover data by when two disk failed.
RAID 5 can work with 3 disk also. and you add extra disk using mdadm



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