[root@mail ~]#
[root@mail ~]# umount /home
[root@mail ~]# resize2fs -p /dev/vg_mail/lv_home 5G
resize2fs 1.41.12 (17-May-2010)
請先運行 'e2fsck -f /dev/vg_mail/lv_home'.
[root@mail ~]# e2fsck -f /dev/vg_mail/lv_home
e2fsck 1.41.12 (17-May-2010)
第一步: 檢查inode,塊,和大小
第二步: 檢查目錄結構
第3步: 檢查目錄連接性
Pass 4: Checking reference counts
第5步: 檢查簇概要信息
/dev/vg_mail/lv_home: 11/2990080 files (0.0% non-contiguous), 233709/11945984 blocks
[root@mail ~]# resize2fs -p /dev/vg_mail/lv_home 5G
resize2fs 1.41.12 (17-May-2010)
Resizing the filesystem on /dev/vg_mail/lv_home to 1310720 (4k) blocks.
Begin pass 2 (max = 32768)
正在重定位塊 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Begin pass 3 (max = 365)
正在掃描inode表 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
The filesystem on /dev/vg_mail/lv_home is now 1310720 blocks long.
[root@mail ~]# mount home
mount: can't find home in /etc/fstab or /etc/mtab
[root@mail ~]# mount /home
[root@mail ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_mail-lv_root
50G 2.2G 45G 5% /
tmpfs 939M 0 939M 0% /dev/shm
/dev/sda1 477M 41M 411M 9% /boot
/dev/mapper/vg_mail-lv_home
4.8G 32M 4.6G 1% /home
[root@mail ~]# lvreduce -L 5G /dev/vg_mail/lv_home
WARNING: Reducing active and open logical volume to 5.00 GiB.
THIS MAY DESTROY YOUR DATA (filesystem etc.)
Do you really want to reduce vg_mail/lv_home? [y/n]: y
Size of logical volume vg_mail/lv_home changed from 45.57 GiB (11666 extents) to 5.00 GiB (1280 extents).
Logical volume lv_home successfully resized.
[root@mail ~]# vgdisplay
--- Volume group ---
VG Name vg_mail
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 3
Max PV 0
Cur PV 1
Act PV 1
VG Size 99.51 GiB
PE Size 4.00 MiB
Total PE 25474
Alloc PE / Size 15088 / 58.94 GiB
Free PE / Size 10386 / 40.57 GiB
VG UUID knA14c-V0Fk-d8Sw-o5lk-tS76-yiX7-nWJZgO
[root@mail ~]# lvextend -L +40G /dev/vg_mail/lv_root
Size of logical volume vg_mail/lv_root changed from 50.00 GiB (12800 extents) to 90.00 GiB (23040 extents).
Logical volume lv_root successfully resized.
[root@mail ~]# resize2fs -p /dev/vg_mail/lv_root
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/vg_mail/lv_root is mounted on /; on-line resizing required
old desc_blocks = 4, new_desc_blocks = 6
Performing an on-line resize of /dev/vg_mail/lv_root to 23592960 (4k) blocks.
The filesystem on /dev/vg_mail/lv_root is now 23592960 blocks long.
[root@mail ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_mail-lv_root
89G 2.2G 82G 3% /
tmpfs 939M 0 939M 0% /dev/shm
/dev/sda1 477M 41M 411M 9% /boot
/dev/mapper/vg_mail-lv_home
4.8G 32M 4.6G 1% /home