Extending logical volume lv_opt to 3.00 GB
Logical volume lv_opt successfully resized
为lv_opt 增加一个G的空间。
[root@NEWLFS mnt]#umount lvm_opt/
调整ext2/3文档系统 需要先卸载，然后调整，不象ReiserFS能够不用卸载。
[root@NEWLFS mnt]#resize2fs /dev/lvm_vg/lv_opt
resize2fs 1.35 (28-Feb-2004)
Please run 'e2fsck -f /dev/lvm_vg/lv_opt' first.
提示先运行e2fsck -f 那就检查下吧
resize2fs -f 参数能够不用e2fsck，检查下也是好的。
[root@NEWLFS mnt]#e2fsck -f /dev/lvm_vg/lv_opt
| 代码: |
| e2fsck 1.35 (28-Feb-2004)
Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information /dev/lvm_vg/lv_opt: 11/262144 files (0.0% non-contiguous), 16443/524288 blocks [root@NEWLFS mnt]#resize2fs /dev/lvm_vg/lv_opt resize2fs 1.35 (28-Feb-2004) Resizing the filesystem on /dev/lvm_vg/lv_opt to 786432 (4k) blocks. The filesystem on /dev/lvm_vg/lv_opt is now 786432 blocks long. |
成功将lv_opt调整成3G，重新mount 看看吧 !
[root@NEWLFS mnt]#mount -t ext3 /dev/lvm_vg/lv_opt lvm_opt/
[root@NEWLFS mnt]#df
| 代码: |
| Filesystem Size Used Avail Use% Mounted on
............. /dev/mapper/lvm_vg-lv_home 3.0G 33M 3.0G 2% /mnt/lvm_home /dev/mapper/lvm_vg-lv_opt 3.0G 33M 2.9G 2% /mnt/lvm_opt [root@NEWLFS mnt]# |
OK啦。 LVM真是方便 ^_^
再来看看如何减小分区大小：
注意： 减小逻辑卷大小之前，应该先减小文档系统的大小，否则可能会导致数据丢失
ReiserFS ：
[root@NEWLFS mnt]#umount lvm_home/
首先卸载ReiserFS文档系统。
[root@NEWLFS mnt]#resize_reiserfs -s-1G /dev/lvm_vg/lv_home
| 代码: |
| resize_reiserfs 3.6.19 (2003 www.namesys.com)
You are running BETA version of reiserfs shrinker. This version is only for testing or VERY CAREFUL use. Backup of you data is recommended. Do you want to continue? [y/N]:y Processing the tree: 0%....20%....40%....60%....80%....100% left 0, 0 /sec nodes processed (moved): int 0 (0), leaves 1 (0), unfm 0 (0), total 1 (0). check for used blocks in truncated region ReiserFS report: blocksize 4096 block count 524288 (786432) free blocks 516061 (778197) bitmap block count 16 (24) Syncing..done resize_reiserfs: Resizing finished successfully. |
先减小文档系统的大小， -s-1G 减去1个G
[root@NEWLFS mnt]#lvreduce -L -1G /dev/lvm_vg/lv_home
WARNING: Reducing active logical volume to 2.00 GB
THIS MAY DESTROY YOUR DATA (filesystem etc.)
Do you really want to reduce lv_home? [y/n]: y
Reducing logical volume lv_home to 2.00 GB
Logical volume lv_home successfully resized
然后减小LV大小， -L -1G 减去1个G 和文档系统保持一致。
[root@NEWLFS mnt]#mount -t reiserfs /dev/lvm_vg/lv_home lvm_home/
[root@NEWLFS mnt]#df
