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环境:
virtual box 下,redhat5 64位版本,原来系统默认分区.
新添加一个8G的硬盘sdb,将新加的硬盘容量扩充到原来的/上去.
1.分区,
[root@test ~]# fdisk -l
Disk /dev/sda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 1044 8281507+ 8e Linux LVM
Disk /dev/sdb: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/sdb doesn't contain a valid partition table
[root@test ~]# fdisk /dev/sdb
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 1044.
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): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-1044, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-1044, default 1044):
Using default value 1044
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
2.创建pv
[root@test ~]# pvcreate /dev/sdb1
Physical volume "/dev/sdb1" successfully created
查看pv
root@test ~]# pvdisplay
/dev/hdc: open failed: No medium found
--- Physical volume ---
PV Name /dev/sda2
VG Name VolGroup00
PV Size 7.90 GB / not usable 23.41 MB
Allocatable yes (but full)
PE Size (KByte) 32768
Total PE 252
Free PE 0
Allocated PE 252
PV UUID ntpCtU-7gX3-988d-ifQv-SCyb-oFcx-S0jFrM
"/dev/sdb1" is a new physical volume of "8.00 GB"
--- NEW Physical volume ---
PV Name /dev/sdb1
VG Name
PV Size 8.00 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID 2XiyBc-5hJD-LJDQ-Fslo-t3CD-go4j-Zt8nxO
3.查看vg
vgdisplay
/dev/hdc: open failed: No medium found
--- 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 7.88 GB
PE Size 32.00 MB
Total PE 252
Alloc PE / Size 252 / 7.88 GB
Free PE / Size 0 / 0
VG UUID Mjkp7h-lSOy-qR7r-RQ1b-FRrH-rNjQ-BOJYDY
4.扩容vg
[root@test ~]# vgextend VolGroup00 /dev/sdb1
/dev/hdc: open failed: No medium found
Volume group "VolGroup00" successfully extended
5.检查vg
[root@test ~]# vgdisplay
/dev/hdc: open failed: No medium found
--- Volume group ---
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 2
Act PV 2
VG Size 15.84 GB
PE Size 32.00 MB
Total PE 507
Alloc PE / Size 252 / 7.88 GB
Free PE / Size 255 / 7.97 GB
VG UUID Mjkp7h-lSOy-qR7r-RQ1b-FRrH-rNjQ-BOJYDY
6.查看lv
[root@test ~]# lvdisplay
/dev/hdc: open failed: No medium found
--- Logical volume ---
LV Name /dev/VolGroup00/LogVol00
VG Name VolGroup00
LV UUID KBRr5T-kBNg-UfqY-5kEE-snsd-eKl3-1dtUT9
LV Write Access read/write
LV Status available
# open 1
LV Size 6.88 GB
Current LE 220
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Name /dev/VolGroup00/LogVol01
VG Name VolGroup00
LV UUID YMu5P9-nuwE-GbD6-9T9P-knzk-H1rQ-ccyzYX
LV Write Access read/write
LV Status available
# open 1
LV Size 1.00 GB
Current LE 32
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
7.扩容lv
[root@test ~]# lvextend /dev/VolGroup00/LogVol00 /dev/sdb1
/dev/hdc: open failed: No medium found
Extending logical volume LogVol00 to 14.84 GB
Logical volume LogVol00 successfully resized
8.查看lv
[root@test ~]# lvdisplay
/dev/hdc: open failed: No medium found
--- Logical volume ---
LV Name /dev/VolGroup00/LogVol00
VG Name VolGroup00
LV UUID KBRr5T-kBNg-UfqY-5kEE-snsd-eKl3-1dtUT9
LV Write Access read/write
LV Status available
# open 1
LV Size 14.84 GB
Current LE 475
Segments 2
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Name /dev/VolGroup00/LogVol01
VG Name VolGroup00
LV UUID YMu5P9-nuwE-GbD6-9T9P-knzk-H1rQ-ccyzYX
LV Write Access read/write
LV Status available
# open 1
LV Size 1.00 GB
Current LE 32
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
9.扩容 / 磁盘空间
[root@test ~]# mount
/dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
/dev/sda1 on /boot type ext3 (rw)
tmpfs on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
[root@test ~]# res
reset resize reslisa restorecon restore.static
resetall resize2fs restore restorecond
[root@test ~]# resize2fs /dev/mapper/VolGroup00-LogVol0
VolGroup00-LogVol00 VolGroup00-LogVol01
[root@test ~]# resize2fs /dev/mapper/VolGroup00-LogVol00
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/mapper/VolGroup00-LogVol00 is mounted on /; on-line resizing required
Performing an on-line resize of /dev/mapper/VolGroup00-LogVol00 to 3891200 (4k) blocks.
The filesystem on /dev/mapper/VolGroup00-LogVol00 is now 3891200 blocks long.
[root@test ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
15G 6.2G 7.5G 46% /
/dev/sda1 99M 13M 82M 14% /boot
tmpfs 250M 0 250M 0% /dev/shm
磁盘空间添加完成
