模擬環境: 新增一顆硬碟 , 將他加入現有之LVM , 並加大目前LVM之容量
[root@mt ~]# fdisk -l
Disk /dev/hda: 82.3 GB, 82348277760 bytes
255 heads, 63 sectors/track, 10011 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hda1 * 1 13 104391 83 Linux
/dev/hda2 14 10011 80308935 8e Linux LVM
Disk /dev/hdb: 122.9 GB, 122942324736 bytes
16 heads, 63 sectors/track, 238216 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Device Boot Start End Blocks Id System
[root@mt ~]# fdisk /dev/hdb
The number of cylinders for this disk is set to 238216.
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)
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-238216, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-238216, default 238216):
Using default value 238216
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): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@mt ~]# partprobe
[root@mt ~]# pvdisplay
/dev/hdd: open failed: No medium found
--- Physical volume ---
PV Name /dev/hda2
VG Name VolGroup00
PV Size 76.59 GB / not usable 26.69 MB
Allocatable yes (but full)
PE Size (KByte) 32768
Total PE 2450
Free PE 0
Allocated PE 2450
PV UUID dfXZbc-pfev-YMTz-XfiR-BveL-HUrl-fmd7Fu
[root@mt ~]# pvcreate /dev/hdb1
Physical volume "/dev/hdb1" successfully created
[root@mt ~]# pvdisplay
--- Physical volume ---
PV Name /dev/hda2
VG Name VolGroup00
PV Size 76.59 GB / not usable 26.69 MB
Allocatable yes (but full)
PE Size (KByte) 32768
Total PE 2450
Free PE 0
Allocated PE 2450
PV UUID dfXZbc-pfev-YMTz-XfiR-BveL-HUrl-fmd7Fu
"/dev/hdb1" is a new physical volume of "114.50 GB"
--- NEW Physical volume ---
PV Name /dev/hdb1
VG Name
PV Size 114.50 GB
Allocatable NO
PE Size (KByte) 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID f82VID-oKsl-ShjT-BZed-enmP-Tum4-ZbAIpM
加大VG及調整LV
以上步驟已用fdisk新增一LVM分割區 /dev/hdb1 並利用 pvcreate 轉成 PV
[root@mt ~]# vgdisplay
--- 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 76.56 GB
PE Size 32.00 MB
Total PE 2450
Alloc PE / Size 2450 / 76.56 GB
Free PE / Size 0 / 0
VG UUID yd3K0H-5IWd-N5AX-q5dZ-j9MP-2xHh-4qPRj2
[root@mt ~]# vgextend VolGroup00 /dev/hdb1
Volume group "VolGroup00" successfully extended
[root@mt ~]# vgdisplay
--- 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 191.03 GB
PE Size 32.00 MB
Total PE 6113
Alloc PE / Size 2450 / 76.56 GB
Free PE / Size 3663 / 114.47 GB
VG UUID yd3K0H-5IWd-N5AX-q5dZ-j9MP-2xHh-4qPRj2
[root@mt ~]# lvdisplay
--- Logical volume ---
LV Name /dev/VolGroup00/LogVol00
VG Name VolGroup00
LV UUID 41mdX5-GhDO-8xUU-cqY8-SrMr-HfME-EnkfsL
LV Write Access read/write
LV Status available
# open 1
LV Size 74.62 GB
Current LE 2388
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 4k7mr6-1qkt-5p35-6oD7-IwPB-lN3V-ixf56I
LV Write Access read/write
LV Status available
# open 1
LV Size 1.94 GB
Current LE 62
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
[root@mt ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
73G 2.7G 66G 4% /
/dev/hda1 99M 19M 76M 20% /boot
tmpfs 489M 0 489M 0% /dev/shm
[root@mt ~]# cat /etc/fstab
/dev/VolGroup00/LogVol00 / ext3 defaults 1 1
LABEL=/boot /boot ext3 defaults 1 2
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
/dev/VolGroup00/LogVol01 swap swap defaults 0 0
[root@mt ~]# lvextend -L +100G /dev/VolGroup00/LogVol00
Extending logical volume LogVol00 to 174.62 GB
Logical volume LogVol00 successfully resized
[root@mt ~]# lvdisplay
--- Logical volume ---
LV Name /dev/VolGroup00/LogVol00
VG Name VolGroup00
LV UUID 41mdX5-GhDO-8xUU-cqY8-SrMr-HfME-EnkfsL
LV Write Access read/write
LV Status available
# open 1
LV Size 174.62 GB
Current LE 5588
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 4k7mr6-1qkt-5p35-6oD7-IwPB-lN3V-ixf56I
LV Write Access read/write
LV Status available
# open 1
LV Size 1.94 GB
Current LE 62
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
[root@mt ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
73G 2.7G 66G 4% /
/dev/hda1 99M 19M 76M 20% /boot
tmpfs 489M 0 489M 0% /dev/shm
[root@mt ~]# resize2fs /dev/VolGroup00/LogVol00
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizing required
Performing an on-line resize of /dev/VolGroup00/LogVol00 to 45776896 (4k) blocks.
The filesystem on /dev/VolGroup00/LogVol00 is now 45776896 blocks long.
[root@mt ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
170G 2.8G 158G 2% /
/dev/hda1 99M 19M 76M 20% /boot
tmpfs 489M 0 489M 0% /dev/shm
