linux下为新硬盘创建lvm分区

DELL R410本来有两块146G的硬盘,再新增一块146G硬盘
现在硬盘便宜了,天猫价650,另需硬盘托架一个70大洋.

开启硬件检测后重启服务器

chkconfig haldaemon on
chkconfig messagebus on
#centos6 没有kudzu服务改用udev
chkconfig kudzu on

认出了新硬盘/dev/sdc
# fdisk -l

Disk /dev/sda: 146.8 GB, 146815733760 bytes
255 heads, 63 sectors/track, 17849 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 25 200781 83 Linux
/dev/sda2 26 1069 8385930 82 Linux swap / Solaris
/dev/sda3 1070 17849 134785350 8e Linux LVM

Disk /dev/sdb: 146.8 GB, 146815733760 bytes
255 heads, 63 sectors/track, 17849 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdb1 * 1 17849 143372061 8e Linux LVM

Disk /dev/sdc: 146.8 GB, 146815737856 bytes
255 heads, 63 sectors/track, 17849 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdc doesn’t contain a valid partition table

查看现有pv
# pvdisplay

— Physical volume —
PV Name /dev/sdb1
VG Name VolGroup01
PV Size 136.73 GB / not usable 11.78 MB
Allocatable yes (but full)
PE Size (KByte) 32768
Total PE 4375
Free PE 0
Allocated PE 4375
PV UUID p2QSKt-hLuG-xGF5-Cj8t-9IxX-cKCf-hP7hIu

— Physical volume —
PV Name /dev/sda3
VG Name VolGroup00
PV Size 128.54 GB / not usable 10.32 MB
Allocatable yes (but full)
PE Size (KByte) 32768
Total PE 4113
Free PE 0
Allocated PE 4113
PV UUID wdCg83-8jEM-XQtP-gmuX-lYor-IpWn-Hve2mr

对新硬盘分区,lvm的id为8e
# fdisk /dev/sdc

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel. Changes will remain in memory only,
until you decide to write them. After that, of course, the previous
content won’t be recoverable.

The number of cylinders for this disk is set to 17849.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

Command (m for help): p

Disk /dev/sdc: 146.8 GB, 146815737856 bytes
255 heads, 63 sectors/track, 17849 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-17849, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-17849, default 17849):
Using default value 17849

Command (m for help): p

Disk /dev/sdc: 146.8 GB, 146815737856 bytes
255 heads, 63 sectors/track, 17849 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdc1 1 17849 143372061 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/sdc: 146.8 GB, 146815737856 bytes
255 heads, 63 sectors/track, 17849 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdc1 1 17849 143372061 8e Linux LVM

Command (m for help): w

创建pv

# pvcreate /dev/sdc1
Physical volume “/dev/sdc1” successfully created
# pvdisplay
— Physical volume —
PV Name /dev/sdb1
VG Name VolGroup01
PV Size 136.73 GB / not usable 11.78 MB
Allocatable yes (but full)
PE Size (KByte) 32768
Total PE 4375
Free PE 0
Allocated PE 4375
PV UUID p2QSKt-hLuG-xGF5-Cj8t-9IxX-cKCf-hP7hIu

— Physical volume —
PV Name /dev/sda3
VG Name VolGroup00
PV Size 128.54 GB / not usable 10.32 MB
Allocatable yes (but full)
PE Size (KByte) 32768
Total PE 4113
Free PE 0
Allocated PE 4113
PV UUID wdCg83-8jEM-XQtP-gmuX-lYor-IpWn-Hve2mr

“/dev/sdc1” is a new physical volume of “136.73 GB”
— NEW Physical volume —
PV Name /dev/sdc1
VG Name
PV Size 136.73 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID rifdUK-ACXa-hGlM-L5iD-UkZ5-p4It-pshfwd

创建vg

# vgcreate VolGroup02 /dev/sdc1
Volume group “VolGroup02” successfully created
# vgdisplay
— Volume group —
VG Name VolGroup02
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 136.73 GB
PE Size 4.00 MB
Total PE 35002
Alloc PE / Size 0 / 0
Free PE / Size 35002 / 136.73 GB
VG UUID YLvkVA-OZQJ-p3yZ-5fEg-4xmH-dXMF-6ZcqTY

— Volume group —
VG Name VolGroup01
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 1
Act PV 1
VG Size 136.72 GB
PE Size 32.00 MB
Total PE 4375
Alloc PE / Size 4375 / 136.72 GB
Free PE / Size 0 / 0
VG UUID bTRPY7-sETF-7yrw-8Iaa-jgMp-msLb-VFf9Pv

— Volume group —
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 128.53 GB
PE Size 32.00 MB
Total PE 4113
Alloc PE / Size 4113 / 128.53 GB
Free PE / Size 0 / 0
VG UUID dZu73K-djmf-Qqes-7Bl2-NcGr-12cx-2ygDPt

创建逻辑卷,分配全部空间

# lvcreate -l 100%FREE -n /dev/VolGroup02/LogVol00 VolGroup02
Logical volume “LogVol00” created
# lvdisplay
— Logical volume —
LV Name /dev/VolGroup02/LogVol00
VG Name VolGroup02
LV UUID TThlLG-BUNw-smr9-Cv1d-cv8D-1V8i-cB0Hfa
LV Write Access read/write
LV Status available
# open 0
LV Size 136.73 GB
Current LE 35002
Segments 1
Allocation inherit
Read ahead sectors auto
– currently set to 256
Block device 253:3

— Logical volume —
LV Name /dev/VolGroup01/LogVol00
VG Name VolGroup01
LV UUID 0JbGWl-ivcx-g4WL-JHY7-RcXc-hEM5-V3htC1
LV Write Access read/write
LV Status available
# open 1
LV Size 136.72 GB
Current LE 4375
Segments 1
Allocation inherit
Read ahead sectors auto
– currently set to 256
Block device 253:2

— Logical volume —
LV Name /dev/VolGroup00/LogVol01
VG Name VolGroup00
LV UUID cZ3Vnw-PMIx-LUNQ-N53R-etKc-s1BS-AmQE82
LV Write Access read/write
LV Status available
# open 1
LV Size 118.53 GB
Current LE 3793
Segments 1
Allocation inherit
Read ahead sectors auto
– currently set to 256
Block device 253:0

— Logical volume —
LV Name /dev/VolGroup00/LogVol00
VG Name VolGroup00
LV UUID R5fS7y-9649-kyZi-VFmn-24lh-ju2w-Uk7TzY
LV Write Access read/write
LV Status available
# open 1
LV Size 10.00 GB
Current LE 320
Segments 1
Allocation inherit
Read ahead sectors auto
– currently set to 256
Block device 253:1

格式化分区
linux的硬盘分区程序会自动为root或指定的用户保留一定的磁盘空间默认是5％,利用mke2fs的-m reserved-percentage选项可以调整这个设置来获得更多的磁盘空间且不影响性能。而在创建了文件系统之后，用户可以用tune2fs来修 改这个设置比如tune2fs -m 1 /dev/sdc1 可以将保留的空间设置为1％
1792102 blocks (5.00%) reserved for the super user

# mkfs -t ext3 /dev/VolGroup02/LogVol00
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
17924096 inodes, 35842048 blocks
1792102 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
1094 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

Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information:

done

This filesystem will be automatically checked every 23 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.

挂载分区

# mkdir /data
# mount /dev/VolGroup02/LogVol00 /data
# df -h
文件系统 容量 已用 可用 已用% 挂载点
/dev/mapper/VolGroup00-LogVol01
115G 12G 98G 11% /
/dev/mapper/VolGroup00-LogVol00
9.7G 152M 9.1G 2% /tmp
/dev/mapper/VolGroup01-LogVol00
133G 35G 91G 28% /opt
/dev/sda1 190M 13M 168M 7% /boot
tmpfs 7.9G 92K 7.9G 1% /dev/shm
/dev/mapper/VolGroup02-LogVol00
135G 188M 128G 1% /data

启动后自动挂载

vi /etc/fstab
/dev/VolGroup02/LogVol00 /data ext3 defaults 1 2

测试写入

#cd /data
#touch testfile

=====================
2012-12-14更新
释放Linux系统预留的硬盘空间,增加-m 1 可以增加空间
# mkfs -t ext3 -m 1 /dev/VolGroup02/LogVol00