Debian Linux LVM配置手册(1)(2)
// 进入 LVM 模式
Debian:/home/reistlin#lvm
// 查看 LVM 磁盘状态 - 目前没有任何 LVM 磁盘信息
lvm>lvmdiskscan
/dev/ram0 [ 8.00 MB]
/dev/ram1 [ 8.00 MB]
/dev/root [ 7.91 GB]
/dev/ram2 [ 8.00 MB]
/dev/sda2 [ 2.08 GB]
/dev/ram3 [ 8.00 MB]
/dev/ram4 [ 8.00 MB]
/dev/ram5 [ 8.00 MB]
/dev/ram6 [ 8.00 MB]
/dev/ram7 [ 8.00 MB]
/dev/ram8 [ 8.00 MB]
/dev/ram9 [ 8.00 MB]
/dev/ram10 [ 8.00 MB]
/dev/ram11 [ 8.00 MB]
/dev/ram12 [ 8.00 MB]
/dev/ram13 [ 8.00 MB]
/dev/ram14 [ 8.00 MB]
/dev/ram15 [ 8.00 MB]
/dev/sdb [ 1.00 GB]
2 disks
17 partitions
0 LVM physical volume whole disks
0 LVM physical volumes
// 查看 LVM 配置文件 - dump 模式
lvm>dumpconfig
devices {
dir=”/dev”
scan=”/dev”
preferred_names=[]
filter=”a/.*/”
cache_dir=”/etc/lvm/cache”
cache_file_prefix=”"
write_cache_state=1
sysfs_scan=1
md_component_detection=1
ignore_suspended_devices=0
}
activation {
missing_stripe_filler=”/dev/ioerror”
reserved_stack=256
reserved_memory=8192
process_priority=-18
mirror_region_size=512
readahead=”auto”
mirror_log_fault_policy=”allocate”
mirror_device_fault_policy=”remove”
}
global {
umask=63
test=0
units=”h”
activation=1
proc=”/proc”
locking_type=1
fallback_to_clustered_locking=1
fallback_to_local_locking=1
locking_dir=”/var/lock/lvm”
}
shell {
history_size=100
}
backup {
backup=1
backup_dir=”/etc/lvm/backup”
archive=1
archive_dir=”/etc/lvm/archive”
retain_min=10
retain_days=30
}
log {
verbose=0
syslog=1
overwrite=0
level=0
indent=1
command_names=0
prefix=” ”
}
// 创建 Physical Volume (PV)
lvm> pvcreate
Please enter a physical volume path
lvm>pvcreate /dev/sdb1
Physical volume “/dev/sdb1″ successfully created
// 查看 Physical Volume (PV) 状态
lvm>pvdisplay
CTRL-c detected: giving up waiting for lock
— Physical volume —
PV Name /dev/sdb1
VG Name vg_test
PV Size 1023.98 MB / not usable 3.98 MB
Allocatable yes (but full)
PE Size (KByte) 4096
Total PE 255
Free PE 0
Allocated PE 255
PV UUID SwfyW5-veGN-1Ptd-VIUo-0I3I-CdVB-QF7BwC
// 再次查看 LVM 磁盘状态
lvm>lvmdiskscan
/dev/ram0 [ 8.00 MB]
/dev/ram1 [ 8.00 MB]
/dev/root [ 7.91 GB]
/dev/ram2 [ 8.00 MB]
/dev/sda2 [ 2.08 GB]
/dev/ram3 [ 8.00 MB]
/dev/ram4 [ 8.00 MB]
/dev/ram5 [ 8.00 MB]
/dev/ram6 [ 8.00 MB]
/dev/ram7 [ 8.00 MB]
/dev/ram8 [ 8.00 MB]
/dev/ram9 [ 8.00 MB]
/dev/ram10 [ 8.00 MB]
/dev/ram11 [ 8.00 MB]
/dev/ram12 [ 8.00 MB]
/dev/ram13 [ 8.00 MB]
/dev/ram14 [ 8.00 MB]
/dev/ram15 [ 8.00 MB]
/dev/sdb1 [ 1023.98 MB] LVM physical volume
1 disk
17 partitions
0 LVM physical volume whole disks
1 LVM physical volume
// 创建 Volume Group (VG)
lvm> vgcreate vg_test
Please enter physical volume name(s)
lvm>vgcreate vg_test /dev/sdb1
Volume group “vg_test” successfully created
// 查看 Volume Group (VG) 状态
lvm>vgdisplay
— Volume group —
VG Name vg_test
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 1020.00 MB
PE Size 4.00 MB
Total PE 255
Alloc PE / Size 0 / 0
Free PE / Size 255 / 1020.00 MB
VG UUID Dbm7gQ-HDao-0z2Z-2u3q-XK9A-bmEv-ES3qC0
// 创建 Logical Volume (LV) - 如果需要使用全部VG空间. 输入 -l
//
lvm>lvcreate -l 255 vg_test -n lv_test
Logical volume “lv_test” created
// 查看 Logical Volume (LV) 状态
lvm>lvdisplay
— Logical volume —
LV Name /dev/vg_test/lv_test
VG Name vg_test
LV UUID l3GUct-M3nG-m837-wOe2-4EWo-ZPU6-xskaq8
LV Write Access read/write
LV Status available
# open 0
LV Size 1020.00 MB
Current LE 255
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 254:0
// 输入 exit 退出 LVM 配置模式. Ext3 格式化 lv_test 逻辑卷
Debian:/home/reistlin#mkfs -t ext3 -j /dev/vg_test/lv_test
mke2fs 1.41.3 (12-Oct-2008)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
65280 inodes, 261120 blocks
13056 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=268435456
8 block groups
32768 blocks per group, 32768 fragments per group
8160 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376
Writing inode tables: done
Creating journal (4096 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 25 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
// 挂载 lv_test 逻辑卷到 /mnt 目录. 你也可以挂载到 /home 目录
Debian:/home/reistlin#mount /dev/vg_test/lv_test /mnt
Debian:/home/reistlin# cd /mnt
// 测试文件读写. Reistlin.Com. OKay.
Debian:/mnt# vim Reistlin.Com
Debian:/mnt# cat Reistlin.Com
Welcome to Reistlin.Com
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