This is a raidtab file. When two halves of the files are exchanged, you can switch between the bad behaviour of mkraid (mkraid /dev/md0: /dev/md1 is active) and good behaviour of mkraid (ie. makes the raid): raiddev /dev/md1 raid-level 1 nr-raid-disks 2 nr-spare-disks 0 chunk-size 4 persistent-superblock 1 device /dev/sdb3 raid-disk 0 device /dev/sda3 failed-disk 1 raiddev /dev/md0 raid-level 1 nr-raid-disks 2 nr-spare-disks 0 chunk-size 4 persistent-superblock 1 device /dev/sdc1 raid-disk 0 device /dev/sdd1 raid-disk 1 Cl< - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html