Hello,
I have 2 physical discs.
I have 4 partitions on the first disk.
I created a volume group "lvmhd" from all of the
partitions and later created logical volumes.
this is the result from the vgdisplay
--- Volume group ---
VG
Name
lvmhd
VG
Access
read/write
VG
Status
available/resizable
VG
#
0
MAX
LV
256
Cur
LV
3
Open
LV
3
MAX LV Size 2
TB
Max
PV
256
Cur
PV
4
Act
PV
4
VG
Size
35.59 GB
PE
Size
32 MB
Total
PE
1139
Alloc PE / Size 1131 / 35.34
GB
Free PE / Size 8 / 256 MB
VG
UUID
xqamqE-9gSs-Xy3O-2tVQ-wYzy-Cp3u-0Wivbd
and those are the logical volumes
/dev/lvmhd/lvm_usr 3.0G
980M 1.8G 35% /usr
/dev/lvmhd/lvm_var
4.9G 65M 4.6G 2%
/var
/dev/lvmhd/lvm_home 27G 33M
25G 1% /home
later I mirrored the first disk to the second disk
with dd if=/dev/hda of=/dev/hdb so if the first disk breaks I can remove it and
replace it with the second disk and get the server up in minutes.
Now I want to be able to use the second disk while
I am running from the first. But the volume groups are the same and I am afraid
that if I will recreate the logical volumes I'll ruin some thing on the second
disk.
Is there anything I can do about it so I could use
the second disk for backups but still have the same architecture as the primary
disk ?
is there any way to mount those logical volumes
which are mirrors of the primary disk ?
for example I can do
pvdisplay /dev/hdb3 (this is the slave disk which
is the mirror of the primary and its not mounted)
--- Physical volume
---
PV
Name
/dev/hdb3
VG
Name
lvmhd
PV
Size
13.67 GB [28676025 secs] / NOT usable 32.19 MB [LVM: 129
KB]
PV#
1
PV
Status
available
Allocatable
yes (but full)
Cur
LV
3
PE Size (KByte) 32768
Total
PE
436
Free
PE
0
Allocated PE
436
PV
UUID
5XenPH-2NLb-cmN0-qEBb-QGuJ-zWxv-otMr7i
thanks