sudo apt-get install mdadm
sudo fdisk -l /dev/sdb
Disk /dev/sdb: 250.1 GB, 250058268160 bytes
255 heads, 63 sectors/track, 30401 cylinders, total 488395055 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: 0x90909090
Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 2099199 1048576 fd Linux raid autodetect
/dev/sdb5 69208064 488394751 209593344 fd Linux raid autodetect
sudo mkdir /mnt/old_hdd
sudo mdadm --examine /dev/sdb5
/dev/sdb5:
Magic : a92b4efc
Version : 1.2
Feature Map : 0x0
Array UUID : 957e7cb5:bfd41f70:9cb84b0d:f53e5a4c
Name : milosz-desktop:2
Creation Time : Sat Aug 20 18:48:26 2011
Raid Level : raid1
Raid Devices : 2
Avail Dev Size : 419184640 (199.88 GiB 214.62 GB)
Array Size : 419184496 (199.88 GiB 214.62 GB)
Used Dev Size : 419184496 (199.88 GiB 214.62 GB)
Data Offset : 2048 sectors
Super Offset : 8 sectors
State : clean
Device UUID : db8a694f:750a0ded:22a6d046:5c4db280
Update Time : Tue May 8 20:50:32 2012
Checksum : 75dbc3b6 - correct
Events : 191
Device Role : Active device 1
Array State : .A ('A' == active, '.' == missing)
sudo mdadm -A -R /dev/md9 /dev/sdb5
mdadm: /dev/md9 has been started with 1 drive (out of 2)
sudo mount /dev/md9 /mnt/old_hdd/
sudo lvscan
ACTIVE '/dev/vg0/swap' [10.00 GiB] inherit
ACTIVE '/dev/vg0/tmp' [20.00 GiB] inherit
ACTIVE '/dev/vg0/root' [2.44 TiB] inherit