Надо увеличить раздел /dev/vg_mail/lv_root на виртуалке.
Делаю qemu-img resize /home/admin/VM/mailserver +10G на хосте, далее
lvresize -L10G /dev/vg_mail/lv_root
Extending logical volume lv_root to 10,00 GiB
Insufficient free space: 1142 extents needed, but only 0 available
--- Logical volume ---
LV Path /dev/vg_mail/lv_root
LV Name lv_root
VG Name vg_mail
LV UUID sKFkYS-L8gN-cr3c-tduj-38YF-c4Yv-Z81CPb
LV Write Access read/write
LV Creation host, time domain.com, 2013-06-10 13:38:27 +0400
LV Status available
# open 1
LV Size 5,54 GiB
Current LE 1418
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Path /dev/vg_mail/lv_swap
LV Name lv_swap
VG Name vg_mail
LV UUID dNkm12-xadz-IZJh-mcXB-Yv5z-rEpb-X3qHc8
LV Write Access read/write
LV Creation host, time domain.com, 2013-06-10 13:38:36 +0400
LV Status available
# open 1
LV Size 1,97 GiB
Current LE 504
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
pvdisplay
--- Physical volume ---
PV Name /dev/vda2
VG Name vg_mail
PV Size 7,51 GiB / not usable 3,00 MiB
Allocatable yes (but full)
PE Size 4,00 MiB
Total PE 1922
Free PE 0
Allocated PE 1922
PV UUID 6lBKqV-oWEZ-EZqH-dDaY-1jaa-WxzL-HYnUml