J'ai donc un RAID 5 avec /dev/sd[b|d|e]1, le but étant de rajouter /dev/sdc1. Tous les disques sont de même taille (et de même modèle).
sudo mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Wed Oct 24 23:29:06 2012
Raid Level : raid5
Used Dev Size : 1953509376 (1863.01 GiB 2000.39 GB)
Raid Devices : 4
Total Devices : 3
Persistence : Superblock is persistent
Update Time : Mon Feb 4 23:29:13 2013
State : active, degraded, Not Started
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Name : abraracourcix:0 (local to host abraracourcix)
UUID : ff8e264e:2c58c2fb:*:*
Events : 1602107
Number Major Minor RaidDevice State
0 8 65 0 active sync /dev/sde1
1 8 17 1 active sync /dev/sdb1
2 8 49 2 active sync /dev/sdd1
3 0 0 3 removed
sudo mdadm --add /dev/md0 /dev/sdc1
mdadm: add new device failed for /dev/sdc1 as 4: Invalid argument
sudo mdadm --run /dev/md0
mdadm: failed to run array /dev/md0: Input/output error
sudo fdisk -l
Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 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: 0xb7e465f7
Device Boot Start End Blocks Id System
/dev/sdb1 63 3907024064 1953512001 83 Linux
Partition 1 does not start on physical sector boundary.
Disk /dev/sdc: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 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: 0x43e31364
Device Boot Start End Blocks Id System
/dev/sdc1 1 3907024064 1953512032 83 Linux
Partition 1 does not start on physical sector boundary.
WARNING: GPT (GUID Partition Table) detected on '/dev/sdd'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sdd: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 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: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdd1 63 3907024064 1953512001 83 Linux
Disk /dev/sde: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 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: 0xe7fc0e6f
Device Boot Start End Blocks Id System
/dev/sde1 2048 3907024064 1953511008+ 83 Linux
WARNING: GPT (GUID Partition Table) detected on '/dev/sdf'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sdf: 2000.4 GB, 2000398934016 bytes
255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 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: 0x00000000
Device Boot Start End Blocks Id System
/dev/sdf1 1 3907029167 1953514583+ ee GPT
Disk /dev/sda: 750.2 GB, 750156374016 bytes
255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 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: 0x000e65ec
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 1465147391 732322817 5 Extended
/dev/sda5 501760 1465147391 732322816 8e Linux LVMOk, je veux bien croire que /dev/sdc1 doit être formaté en RAID Linux autodetect, mais je n'ai pas trouvé comment faire... Fdisk ne m'offre jamais cette option
Accessoirement, sur mon volume RAID /dev/md0, j'ai un volume LVM (logique), mais il n'apparaît plus
sudo pvscan
PV /dev/sda5 VG abraracourcix lvm2 [698,39 GiB / 0 free]
Total: 1 [698,39 GiB] / in use: 1 [698,39 GiB] / in no VG: 0 [0 ]
sudo lvscan
ACTIVE '/dev/abraracourcix/root' [332,00 MiB] inherit
ACTIVE '/dev/abraracourcix/usr' [8,38 GiB] inherit
ACTIVE '/dev/abraracourcix/var' [2,79 GiB] inherit
ACTIVE '/dev/abraracourcix/swap_1' [30,11 GiB] inherit
ACTIVE '/dev/abraracourcix/tmp' [380,00 MiB] inherit
ACTIVE '/dev/abraracourcix/home' [656,42 GiB] inherit
)
).
