I had some recent computer issues and somehow one of my disks ended up not being recognized in my array anymore. It identifies fine, and both smart and some other disk checking utils all say its fine, but somehow the UUID is different.
as a result, mdadm says there is a 'removed' disk. Ideally I'd like to just update it so that it detects it again, but since this is raid-5 I don't see why I couldn't just remove it from the array and then re-add it and let it rebuild.
unfortuntely every command I see wants me to refer to it as a device when removing it, but as far as md is concerned its just a uuid that is no longer available. How can I remove a disk that is currently set as "removed"?
-- Edit: More info, as requested. I'm currently running in an ubuntu live cd without networking, so these are hand typed. Sorry if theres any spacing issues.
/proc/mdstat: Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] md0 : inactive sdd1 sdc sde1 3907034368 blocks mdadm --detail /dev/md0 /dev/md0: Version : 00.90 Creation Time : Wed May 26 22:59:21 2004 Raid Level : raid5 Used Dev Size : 976759936 (931.51 GiB 1000.20 GB) Raid Devices: 4 Total Devices: 3 Prefered Minor : 0 Persistence: Superblock is persistent Update Time: Sat Nov 27 1:03:17 2010 State : active, degraded, Not Started Active Devices: 3 Working Devices: 3 Failed Devices: 0 Spare Devices: 0 Layout : left-symmetric Chunk Size: 64K UUID: 5a4d2b61:9c5c6ad5:aea414d0:5f8dbc13 Events: 0.2169805 Number Major Minor Raiddevice State 0 8 49 0 active sync /dev/sdd1 1 8 65 1 active sync /dev/sde1 2 0 0 2 removed 3 8 32 3 active sync /dev/sdc