Ubuntu hangs up when creating LVM snapshot of /root volume

**poisonborz** · 08-14-2010

Hola,
Recently, I've tried to create a snapshot of my /root folder in 10.04 (I remember to have done so a couple of times without trouble).

I used the command
HTML Code:

Code:

lvcreate -L10G -s -n rootsnapshot /dev/server/root

Without a hint of HDD activity, Gnome (?) hangs up - I can move the mouse, and the clock is moving on, but I can't click on anything. No HDD activity, and this goes on forever (after a while, the whole system locks up). This happens each time when I try to create a snapshot.

What could be the problem?
Thanks

**linuxaria** · 08-18-2010

More info please: lvdisplay, vgdisplay and a df -h please ?

**poisonborz** · 08-18-2010

Sure, here it is:

Code:

------------------------------------------------------------------------------- lvdisplay

--- Logical volume ---
  LV Name                /dev/server/ServerLinux
  VG Name                server
  LV UUID                P63Uoy-V3TA-vSPr-3yVj-dG0Z-KsBg-iR2Jha
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                10.00 GiB
  Current LE             2560
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           252:0
   
  --- Logical volume ---
  LV Name                /dev/server/ServerBackup
  VG Name                server
  LV UUID                PW37n1-uoKy-u6wq-XsAS-14XL-Faar-83v0st
  LV Write Access        read/write
  LV Status              available
  # open                 0
  LV Size                50.00 GiB
  Current LE             12800
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           252:1
   
  --- Logical volume ---
  LV Name                /dev/server/ServerHome
  VG Name                server
  LV UUID                5oppft-7oyH-VNKZ-oYUG-u1mY-jKvR-lQ31eh
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                142.00 GiB
  Current LE             36352
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           252:2

------------------------------------------------------------------------------- vgdisplay

--- Volume group ---
VG Name               server
System ID             
Format                lvm2
Metadata Areas        1
Metadata Sequence No  20
VG Access             read/write
VG Status             resizable
MAX LV                0
Cur LV                3
Open LV               2
Max PV                0
Cur PV                1
Act PV                1
VG Size               212.27 GiB
PE Size               4.00 MiB
Total PE              54342
Alloc PE / Size       51712 / 202.00 GiB
Free  PE / Size       2630 / 10.27 GiB
VG UUID               wHLmEN-fAok-FkR0-eH9j-JxT9-HhuH-n8aba0


------------------------------------------------------------------------------- df -h

Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/server-ServerLinux
                      9.9G  3.0G  6.5G  32% /
none                  480M  292K  480M   1% /dev
none                  484M  180K  484M   1% /dev/shm
none                  484M   92K  484M   1% /var/run
none                  484M     0  484M   0% /var/lock
none                  484M     0  484M   0% /lib/init/rw
/dev/sda4              99M   36M   58M  39% /boot
/dev/mapper/server-ServerHome
                      140G  301M  133G   1% /home

**ptkobe** · 08-20-2010

Originally Posted by poisonborz

Code:

lvcreate -L10G -s -n rootsnapshot /dev/server/root

Shouldn't it be

Code:

lvcreate -L10G -s -n rootsnapshot /dev/server/ServerLinux

?

Also, free space on vg server is very near to 10G. Can this be a problem, I wonder.

Just trying to help
Regards
Luis

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