About mounting LVM

satimis · 04-16-2015, 11:54 AM

Hi all,

Ubuntu 14.04

# fdisk -l

Code:

Disk /dev/sda: 128.0 GB, 128035676160 bytes
255 heads, 63 sectors/track, 15566 cylinders, total 250069680 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: 0x0002bbba

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      499711      248832   83  Linux
/dev/sda2          501758   250068991   124783617    5  Extended
/dev/sda5          501760   250068991   124783616   8e  Linux LVM
.......

I'm trying to mount /dev/sda (128.GB)

# pvs

Code:

  PV         VG        Fmt  Attr PSize   PFree  
  /dev/sda5  ubuntu-vg lvm2 a--  119.00g      0 
  /dev/sdb3  ubuntu-vg lvm2 a--  953.13g  21.81g
  /dev/sdc1            lvm2 a--  243.00m 243.00m
  /dev/sdc5  LVM1.5D   lvm2 a--    1.36t      0

# lvdisplay /dev/ubuntu-vg

Code:

  --- Logical volume ---
  LV Path                /dev/ubuntu-vg/root
  LV Name                root
  VG Name                ubuntu-vg
  LV UUID                Db8GE3-ychP-HPWp-i4sS-4l96-OWgd-OYlYPu
  LV Write Access        read/write
  LV Creation host, time ubuntu, 2015-04-15 16:31:41 +0800
  LV Status              NOT available
  LV Size                87.09 GiB
  Current LE             22296
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
   
  --- Logical volume ---
  LV Path                /dev/ubuntu-vg/swap_1
  LV Name                swap_1
  VG Name                ubuntu-vg
  LV UUID                R1Rscl-UHS3-8HcX-3yrS-Say2-rL2H-uMyiph
  LV Write Access        read/write
  LV Creation host, time ubuntu, 2015-04-15 16:31:44 +0800
  LV Status              NOT available
  LV Size                31.91 GiB
  Current LE             8168
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto

Please advise which device shall I mount?

Thanks

Regards
satimis

veerain · 04-16-2015, 11:59 AM

Mount what for what purpose?

Quote:

/dev/ubuntu-vg/root

This is perhaps the root filesystem residing.

satimis · 04-16-2015, 12:29 PM

Quote:

Originally Posted by veerain

Mount what for what purpose?

This is perhaps the root filesystem residing.

Hi,

I have 2 SSDs installed on this PC both with Ubuntu 14.04 as OS, one running KVM (1TB-SSD) and another running Virtualbox (120G-SSD).

Previously the former was partitioned with LV and the later without partition. On booting the PC I could select on the bootloader either to boot the 1TB-SSD or the 120G-SSD to work.

Later I re-installed the 120G-SSD with LV partition. Then on booting the PC I couldn't select the 120G-SSD to start. I'm only allowed to boot the 1TB-SSD. Even on BIOS I couldn't boot 120G-SSD.

It is very strange to me. The BIOS detects the 120G-SSD but I couldn't boot it. I must disconnect the cable to the 1TB-SSD then I can boot the 120G-SSD.

I'm now trying to mount the 120G-SSD after booting the 1TB-SSD to check its content.

Regards
satimis

veerain · 04-16-2015, 12:55 PM

While creating LVM partitions you should have note down which name corresponds to which partition.

You can use pvdisplay and lvdisplay to find out.

Mount each lv and from contents find out which belongs to which.