I've a 4 HD raid10 with to failed drive. Any attempt I made to add 2
replacement disks fail consistently.
mdadm -Af /dev/md1 /dev/sdm2 /dev/sdp2 /dev/sdb2 /dev/sdd2
mdadm: failed to add /dev/sdd2 to /dev/md1: Device or resource busy
mdadm: /dev/md1 assembled from 2 drives and 1 spare - not enough to
start the array.
or
root@disk:~# mdadm -AR /dev/md1 /dev/sdm2 /dev/sdp2
mdadm: failed to RUN_ARRAY /dev/md1: Input/output error
mdadm: Not enough devices to start the array.
root@disk:~# mdadm --add /dev/md1 /dev/sdb2
mdadm: add new device failed for /dev/sdb2 as 4: Invalid argument
The array is in near mode and I lost disk 0 and 1. Does it mean that my
data are toasted?
mdadm --examine /dev/sdm2
/dev/sdm2:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : d90ad6fe:1355134f:f83ffadc:a4fe7859
Name : m1:1
Creation Time : Thu Apr 1 21:28:58 2010
Raid Level : raid10
Raid Devices : 4
Avail Dev Size : 3907026909 (1863.02 GiB 2000.40 GB)
Array Size : 7814049792 (3726.03 GiB 4000.79 GB)
Used Dev Size : 3907024896 (1863.01 GiB 2000.40 GB)
Data Offset : 272 sectors
Super Offset : 8 sectors
State : clean
Device UUID : e217355e:632ac2f0:8120e55e:3878bd88
Update Time : Wed Jun 2 12:31:39 2010
Checksum : feef2809 - correct
Events : 1377156
Layout : near=2, far=1
Chunk Size : 1024K
Array Slot : 3 (failed, failed, 2, 3)
Array State : __uU 2 failed
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