LVM: Mount LVM Partition(s) in Rescue Mode

LVM: Mount LVM Partition(s) in Rescue Mode


# When system is not able to boot up due to OS problems we may be leaded to boot it into
# Rescue Mode using a installation CD.

# While booting in this mode, system will try to find out linux installation and mount it
# under /mnt/sysimage giving us the opportunity of getting to F.S. in order to make
# appropriate modifications for system to be recovered. Sometimes, if OS is seriously
# damaged this is not possible. In this case, it may be useful to manually mount LVM
# partitions to check/modify OS to recover server.


# Boot the machine with installation CD into Rescue Mode.

sh-3.2# df -k
   Filesystem                1K-blocks        Used     Available  Use%   Mounted on
   /dev                         517568           0        517568    0%   /dev
   /tmp/loop0                   109184      109184             0  100%   /mnt/runtime

sh-3.2# vgs
   sh: vgs: command not found

sh-3.2# pvscan
   sh:  pvscan: command not found


# We get this kind of errors because lvm commands are not available in Rescue Mode.
# Instead we will precede any lvm commands by "lvm" command this way:

sh-3.2# lvm vgs
   VG    #PV  #LV  #SN  Attr      VSize    VFree
   vg00    1    7    0  wz--n-    31.50G      0


 
# Now we are ready to use lvm commands so we can mount our lvm volumes

# Check existing logical volumes

sh-3.2# lvm lvs
   LV      VG    Attr    LSize  Origin Snap%  Move Log Copy%  Convert
   lvhome  vg00  -wi---  4.50G
   lvopt   vg00  -wi---  5.00G
   lvroot  vg00  -wi---  5.00G
   lvswap  vg00  -wi---  5.00G
   lvtmp   vg00  -wi---  2.00G
   lvusr   vg00  -wi---  5.00G
   lvvar   vg00  -wi---  5.00G


# Activate our root volume group

sh-3.2# lvm vgchange -a y vg00
  7 logical volume(s) in volume group "vg00" now active

# Mount any desired volume, in this case "/" filesystem
 
sh-3.2# mkdir /mnt/temp
sh-3.2# mount /dev/vg00/lvroot /mnt/temp

# Now we are able to access our OS data to make any needed check/modification
5 (1)
Article Rating (1 Votes)
Rate this article
Attachments
There are no attachments for this article.
Comments
There are no comments for this article. Be the first to post a comment.
Full Name
Email Address
Security Code Security Code
Related Articles RSS Feed
How to maximise SSD performance with Linux
Viewed 8831 times since Fri, May 15, 2020
Stunnel Setup
Viewed 18034 times since Fri, Sep 28, 2018
Linux - How to get Memory information
Viewed 2085 times since Fri, Jun 8, 2018
RHEL: How to change a USER/GROUP UID/GID and all owned files
Viewed 24949 times since Sat, Jun 2, 2018
Easily Monitor CPU Utilization in Linux Terminal With Stress Terminal UI
Viewed 4292 times since Thu, Apr 18, 2019
LVM: Create a new Volume Group
Viewed 2246 times since Sat, Jun 2, 2018
CentOS / RHEL 7 : Configuring an NFS server and NFS client Linux NFS
Viewed 16721 times since Fri, Feb 21, 2020
Nagrywanie sesji SSH do pliku
Viewed 3098 times since Thu, May 24, 2018
Linux File Systems (mkfs, mount, fstab) ext4
Viewed 3343 times since Sat, Jun 2, 2018
RHEL: How to rebuild and/or patch a RPM package
Viewed 9003 times since Sat, Jun 2, 2018