I have 2 harddisk, the first hdd (80 GB) is an empty hdd that i have already installed with new ubuntu server and the other one is an old hdd(180 GB) consist of ubuntu with LVM system. And i am trying to add the oll hdd to my cpu. Here is the 2 hdd detail
# fdisk -l
Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000a4ac8
Device Boot Start End Blocks Id System
/dev/sda1 * 1 9328 74920960 83 Linux
/dev/sda2 9328 9730 3227649 5 Extended
/dev/sda5 9328 9730 3227648 82 Linux swap / Solaris
Disk /dev/sdb: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xe626e626
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 19426 156039313+ 8e Linux LVM
/dev/sdb2 19427 19457 249007+ 5 Extended
/dev/sdb5 19427 19457 248976 83 Linux
As you can see the old hdd ( 160 GB) /dev/sdb1 have LINUX LVM , you need lvm2 so you can mount it, here is the step
#apt-get install lvm2
You need to use pvs command to determine the volume group containing the physical volume /dev/sdb1
# pvs
PV VG Fmt Attr PSize PFree
/dev/sdb1 test lvm2 a- 148.81g 0
You can see there are physical volume named test onsecond hdd /dev/sdb1
let’s list the logical volumes in physical volume named test
# lvdisplay
— Logical volume —
LV Name /dev/test/root
VG Name test
LV UUID 1bvHS8-07SA-WuAg-tF5q-eWB5-Lp8a-2cyteC
LV Write Access read/write
LV Status available
# open 1
LV Size 143.08 GiB
Current LE 36629
Segments 1
Allocation inherit
Read ahead sectors auto
– currently set to 256
Block device 251:0
— Logical volume —
LV Name /dev/test/swap_1
VG Name test
LV UUID Y6c4ge-sv5W-anJY-e4sH-dis8-a5Qi-rABjMO
LV Write Access read/write
LV Status available
# open 0
LV Size 5.73 GiB
Current LE 1466
Segments 1
Allocation inherit
Read ahead sectors auto
– currently set to 256
Block device 251:1
As you can see there are 2 lvm /dev/test/swap_1 and /dev/test/root that actual shortcut from /dev/mapper/test-swap_1 and /dev/mapper/test-root
Now you just need to mount the /dev/testroot to directory you wanted , let say /mnt/oldhdd
# mkdir /mnt/oldhdd
# mount /dev/test/root /mnt/oldhd/
you can see the mount now
df -ah
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/test-root 141G 27G 108G 20% /mnt/oldhd
