[LVM]使用LVM延伸磁碟容量
發表於 : 2012-04-12 11:17:31
http://linux.vbird.org/linux_basic/0420 ... lvm_whatis
原始環境
作業目標: 加大 /home 的容量
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原始環境
代碼: 選擇全部
[root@rhel-lvm ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_rhel-lv_root
34G 1.8G 31G 6% /
tmpfs 498M 0 498M 0% /dev/shm
/dev/sda1 194M 23M 162M 13% /boot
/dev/mapper/vg_rhel-lv_home
20G 413M 18G 3% /home
/dev/mapper/vg_rhel-lv_tmp
3.9G 72M 3.6G 2% /tmp
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代碼: 選擇全部
[root@rhel-lvm ~]# fdisk /dev/sdb
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
Command (m for help): t
No partition is defined yet!
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-5221, default 1): 1
Last cylinder, +cylinders or +size{K,M,G} (1-5221, default 5221):
Using default value 5221
Command (m for help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): L
0 Empty 24 NEC DOS 81 Minix / old Lin bf Solaris
1 FAT12 39 Plan 9 82 Linux swap / So c1 DRDOS/sec (FAT-
2 XENIX root 3c PartitionMagic 83 Linux c4 DRDOS/sec (FAT-
3 XENIX usr 40 Venix 80286 84 OS/2 hidden C: c6 DRDOS/sec (FAT-
4 FAT16 <32M 41 PPC PReP Boot 85 Linux extended c7 Syrinx
5 Extended 42 SFS 86 NTFS volume set da Non-FS data
6 FAT16 4d QNX4.x 87 NTFS volume set db CP/M / CTOS / .
7 HPFS/NTFS 4e QNX4.x 2nd part 88 Linux plaintext de Dell Utility
8 AIX 4f QNX4.x 3rd part 8e Linux LVM df BootIt
9 AIX bootable 50 OnTrack DM 93 Amoeba e1 DOS access
a OS/2 Boot Manag 51 OnTrack DM6 Aux 94 Amoeba BBT e3 DOS R/O
b W95 FAT32 52 CP/M 9f BSD/OS e4 SpeedStor
c W95 FAT32 (LBA) 53 OnTrack DM6 Aux a0 IBM Thinkpad hi eb BeOS fs
e W95 FAT16 (LBA) 54 OnTrackDM6 a5 FreeBSD ee GPT
f W95 Ext'd (LBA) 55 EZ-Drive a6 OpenBSD ef EFI (FAT-12/16/
10 OPUS 56 Golden Bow a7 NeXTSTEP f0 Linux/PA-RISC b
11 Hidden FAT12 5c Priam Edisk a8 Darwin UFS f1 SpeedStor
12 Compaq diagnost 61 SpeedStor a9 NetBSD f4 SpeedStor
14 Hidden FAT16 <3 63 GNU HURD or Sys ab Darwin boot f2 DOS secondary
16 Hidden FAT16 64 Novell Netware af HFS / HFS+ fb VMware VMFS
17 Hidden HPFS/NTF 65 Novell Netware b7 BSDI fs fc VMware VMKCORE
18 AST SmartSleep 70 DiskSecure Mult b8 BSDI swap fd Linux raid auto
1b Hidden W95 FAT3 75 PC/IX bb Boot Wizard hid fe LANstep
1c Hidden W95 FAT3 80 Old Minix be Solaris boot ff BBT
1e Hidden W95 FAT1
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.
代碼: 選擇全部
[root@rhel-lvm ~]# pvcreate /dev/sdb1
Physical volume "/dev/sdb1" successfully created
[root@rhel-lvm ~]# pvscan
PV /dev/sda2 VG vg_rhel lvm2 [57.84 GiB / 0 free]
PV /dev/sdb1 lvm2 [39.99 GiB]
Total: 2 [97.84 GiB] / in use: 1 [57.84 GiB] / in no VG: 1 [39.99 GiB]
[root@rhel-lvm ~]# vgextend vg_rhel /dev/sdb1
Volume group "vg_rhel" successfully extended
代碼: 選擇全部
[root@rhel-lvm ~]# vgdisplay
--- Volume group ---
VG Name vg_rhel
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 3
Max PV 0
Cur PV 2
Act PV 2
VG Size 97.83 GiB
PE Size 16.00 MiB
Total PE 6261
Alloc PE / Size 3702 / 57.84 GiB
Free PE / Size 2559 / 39.98 GiB
VG UUID 27re2c-DxBp-NUaR-G4pS-UBCL-VM1o-yfKfid
代碼: 選擇全部
[root@rhel-lvm ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_rhel-lv_root
34G 1.8G 31G 6% /
tmpfs 498M 0 498M 0% /dev/shm
/dev/sda1 194M 23M 162M 13% /boot
/dev/mapper/vg_rhel-lv_home
20G 413M 18G 3% /home
/dev/mapper/vg_rhel-lv_tmp
3.9G 72M 3.6G 2% /tmp
代碼: 選擇全部
[root@rhel-lvm ~]# lvresize -l +2559 /dev/mapper/vg_rhel-lv_home
Extending logical volume lv_home to 59.52 GiB
Logical volume lv_home successfully resized
代碼: 選擇全部
[root@rhel-lvm ~]# resize2fs /dev/mapper/vg_rhel-lv_home
resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/mapper/vg_rhel-lv_home is mounted on /home; on-line resizing required
old desc_blocks = 2, new_desc_blocks = 4
Performing an on-line resize of /dev/mapper/vg_rhel-lv_home to 15601664 (4k) blocks.
The filesystem on /dev/mapper/vg_rhel-lv_home is now 15601664 blocks long.
代碼: 選擇全部
[root@rhel-lvm ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_rhel-lv_root
34G 1.8G 31G 6% /
tmpfs 498M 0 498M 0% /dev/shm
/dev/sda1 194M 23M 162M 13% /boot
/dev/mapper/vg_rhel-lv_home
59G 421M 56G 1% /home
/dev/mapper/vg_rhel-lv_tmp
3.9G 72M 3.6G 2% /tmp