one of two disks in my RAID 1 died so I replaced it. When new disk has been added to array the sync process started and few minutes later it has become a Spare. How can I "force" the disk to be a regular part of an array?
# cat /proc/mdstat Personalities : [raid1] md0 : active raid1 sdb1 sda1 401472 blocks [2/2] [UU] md1 : active raid1 sdb2(S) sda2 487982336 blocks [2/1] [U_] unused devices: <none>
As you can see partition sdb1 is regular part of array md0. But sdb2 is marked as Spare and won't get added to md1.
The old disk was 500GB with 512B sectors and the new one is 1TB with 4KiB sector size. Can this be the root of the problem?
Old disk had the same geometry as sda. The new disk is sdb.
# fdisk -l /dev/sda Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000dda75 Device Boot Start End Blocks Id System /dev/sda1 * 63 803249 401593+ fd Linux raid autodetect /dev/sda2 803250 976768064 487982407+ fd Linux raid autodetect # fdisk -l /dev/sdb Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdb1 * 2048 809343 403648 fd Linux raid autodetect /dev/sdb2 809344 976774159 487982408 fd Linux raid autodetect
I have made sdb2 one block larger then sda2 (487982408 vs. 487982407+) So I assume all should be good.
It's Fedora 18.104.22.168-97.fc14.x86_64 I'll welcome any advice.