Дополнительная информация:
root@sergo-probook:~# uname -a
Linux sergo-probook 2.6.38-10-generic #46-Ubuntu SMP Tue Jun 28 15:07:17 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
root@sergo-probook:~# cat /etc/fstab
proc /proc proc nodev,noexec,nosuid 0 0
/dev/mapper/sergo--probook-root / ext4 errors=remount-ro,relatime 0 1
/dev/sda1 /boot ext2 defaults 0 2
/dev/mapper/sergo--probook-home /home ext4 noatime 0 2
/dev/mapper/sergo--probook-swap none swap sw 0 0
/dev/mapper/cryptswap1 none swap sw 0 0
root@sergo-probook:~# pvscan
PV /dev/sda5 VG sergo-probook lvm2 [465,52 GiB / 424,36 GiB free]
Total: 1 [465,52 GiB] / in use: 1 [465,52 GiB] / in no VG: 0 [0 ]
root@sergo-probook:~# vgscan
Reading all physical volumes. This may take a while...
Found volume group "sergo-probook" using metadata type lvm2
root@sergo-probook:~# lvscan
ACTIVE '/dev/sergo-probook/root' [7,45 GiB] inherit
ACTIVE '/dev/sergo-probook/home' [29,80 GiB] inherit
ACTIVE '/dev/sergo-probook/swap' [3,91 GiB] inherit
root@sergo-probook:~# lvdisplay
--- Logical volume ---
LV Name /dev/sergo-probook/root
VG Name sergo-probook
LV UUID cCbz71-3hUY-T3tY-DMzE-3r2s-A7L7-QWKp4O
LV Write Access read/write
LV Status available
# open 1
LV Size 7,45 GiB
Current LE 1907
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:0
--- Logical volume ---
LV Name /dev/sergo-probook/home
VG Name sergo-probook
LV UUID HTE7aQ-ODGe-0q9Q-jLAV-735o-65D3-X8Gxan
LV Write Access read/write
LV Status available
# open 1
LV Size 29,80 GiB
Current LE 7629
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:1
--- Logical volume ---
LV Name /dev/sergo-probook/swap
VG Name sergo-probook
LV UUID DRWp8o-zHvF-A5eq-dcX7-0zSt-Civt-craDrN
LV Write Access read/write
LV Status available
# open 2
LV Size 3,91 GiB
Current LE 1001
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:2
Что еще поможет пролить свет на происходящее?