LVM操作笔记
linux 增加新硬盘 lvm 操作笔记
用fdisk分区
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fdisk /dev/sdb
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-182203, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-182203, default 182203):
Using default value 182203
Command (m for help): p
Disk /dev/sdb: 1498.6 GB, 1498675150848 bytes
255 heads, 63 sectors/track, 182203 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 182203 1463545566 83 Linux
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)
Command (m for help): p
Disk /dev/sdb: 1498.6 GB, 1498675150848 bytes
255 heads, 63 sectors/track, 182203 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 182203 1463545566 8e Linux LVM
Command (m for help):w
创建物理卷
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pvcreate /dev/sdb1
pvdisplay
--- Physical volume ---
PV Name /dev/sdb1
VG Name VolGroup01
PV Size 1.36 TB / not usable 3.72 MB
Allocatable yes (but full)
PE Size (KByte) 4096
Total PE 357310
Free PE 0
Allocated PE 357310
PV UUID sZRivL-zIzC-Ysq5-WRLb-ll9e-royp-Ovg8Y5
--- Physical volume ---
PV Name /dev/sda2
VG Name VolGroup00
PV Size 465.15 GB / not usable 21.99 MB
Allocatable yes
PE Size (KByte) 32768
Total PE 14884
Free PE 1
Allocated PE 14883
PV UUID 2c2wFj-inYf-8dwK-K9Ip-C0Qh-oYwp-XPuccz
创建卷组
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vgcreate VolGroup01 /dev/sdb1
vgdisplay
--- Volume group ---
VG Name VolGroup01
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 1.36 TB
PE Size 4.00 MB
Total PE 357310
Alloc PE / Size 357310 / 1.36 TB
Free PE / Size 0 / 0
VG UUID 6m2kb9-xueP-dDUf-GiQS-y5ve-vUYu-b5eJHM
创建逻辑卷
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lvcreate -l 357310 -n LogVol02 VolGroup01
在逻辑卷上创建ext3文件系统
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mkfs -t ext3 /dev/VolGroup01/LogVol02
mke2fs 1.35 (28-Feb-2004)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
182943744 inodes, 365885440 blocks
18294272 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
11166 block groups
32768 blocks per group, 32768 fragments per group
16384 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
102400000, 214990848
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 34 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
挂载文件系统
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mkdir /data
mount /dev/VolGroup01/LogVol02 /data
# df -h
Filesystem 容量 已用 可用 已用% 挂载点
/dev/mapper/VolGroup00-LogVol00
449G 2.2G 424G 1% /
/dev/sda1 99M 15M 80M 16% /boot
none 3.9G 0 3.9G 0% /dev/shm
/dev/mapper/VolGroup01-LogVol02
1.4T 102M 1.3T 1% /data
设置启动时自动挂载
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在系统启动时自动加载文件系统，则还需要在/etc/fstab中添加内容
/dev/VolGroup01/LogVol02 /data ext3 defaults 1 2
为保证不出现人为的错误编辑fstab，可在图形界面（gnome）中设置：系统设置――逻辑卷管理器――找到对应逻辑卷（LogVol02）――编辑属性――文件系统――重新启动时自动挂载(/data)――确定