1 檢視磁盤容量資訊
[[email protected] ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VG-LogVol 1.9T 1.8T 61G 97% / # LVM卷組-邏輯卷
tmpfs 63G 0 63G 0% /dev/shm
/dev/sda1 485M 40M 421M 9% /boot 2 檢視磁盤扇區資訊
[[email protected] ~]# fdisk -l
Disk /dev/sda: 299.0 GB, 298999349248 bytes # 磁盤/dev/sda
255 heads, 63 sectors/track, 36351 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x4d69fe0e
Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 204800 83 Linux # 分為2個區, sda1
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 36352 291785728 8e Linux LVM # LVM類型的sda2
# 新添加的磁盤/dev/sdb, 沒有分區
Disk /dev/sdb: 4000.0 GB, 3999999721472 bytes
255 heads, 63 sectors/track, 486305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
# LVM格式的卷組資訊:
Disk /dev/mapper/VolGroup-LogVol: 4294 MB, 4294967296 bytes
255 heads, 63 sectors/track, 522 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000 3.3 建立分區
[[email protected] ~]# fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x5b3d66ba.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: The size of this disk is 4.0 TB (3999999721472 bytes).
DOS partition table format can not be used on drives for volumes
larger than (2199023255040 bytes) for 512-byte sectors. Use parted(1) and GUID
partition table format (GPT).
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): n # 添加分區
Command action
e extended
p primary partition (1-4)
p # 添加主分區
Partition number (1-4): 1 # 1号主分區, 即/dev/sdb1
First cylinder (1-486305, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-267349, default 267349): 486305
Value out of range.
Last cylinder, +cylinders or +size{K,M,G} (1-267349, default 267349):
Using default value 267349
Command (m for help): n # 繼續添加分區
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 2 # 2号主分區, 即/dev/sdc2
First cylinder (267350-486305, default 267350):
Using default value 267350
Last cylinder, +cylinders or +size{K,M,G} (267350-486305, default 486305):
Using default value 486305
Command (m for help): p # 列印分區資訊:
Disk /dev/sdb: 4000.0 GB, 3999999721472 bytes
255 heads, 63 sectors/track, 486305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x5b3d66ba
Device Boot Start End Blocks Id System
/dev/sdb1 1 267349 2147480811 83 Linux
/dev/sdb2 267350 486305 1758764070 83 Linux
Command (m for help): t # 轉換類型
Partition number (1-4): 1
Partition number (1-4): 1 # 修改/dev/sdb1為Linux LVM類型:
Hex code (type L to list codes): L # 檢視可用類型:
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 # 修改為8e, 即Linux LVM類型
Changed system type of partition 1 to 8e (Linux LVM)
Command (m for help): t
Partition number (1-4): 2 # 修改/dev/sdc2為Linux LVM類型
Hex code (type L to list codes): 8e
Changed system type of partition 2 to 8e (Linux LVM)
Command (m for help): p # 再次檢視相關資訊:
Disk /dev/sdc: 4000.0 GB, 3999999721472 bytes
255 heads, 63 sectors/track, 486305 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x5b3d66ba
Device Boot Start End Blocks Id System
/dev/sdb1 1 267349 2147480811 8e Linux LVM # Id已改變
/dev/sdb2 267350 486305 1758764070 8e Linux LVM
Command (m for help): w # 儲存并退出
The partition table has been altered! # 修改成功
Calling ioctl() to re-read partition table.
Syncing disks. 4 建立實體卷
[[email protected] ~]# pvcreate /dev/sdb1
Physical volume "/dev/sdb1" successfully created
[[email protected] ~]# pvcreate /dev/sdb2
Physical volume "/dev/sdb2" successfully created 5 擴充卷組
# 檢視已有卷組, 發現該卷組就是需要擴容的卷組, 就不必再次建立卷組, 而是直接擴充卷組即可:
[[email protected] ~]# vgs
VG #PV #LV #SN Attr VSize VFree
VolGroup 2 2 0 wz--n- 1.91t 0
# 擴充卷組:
[[email protected] ~]# vgextend VolGroup /dev/sdb1
Volume group "VolGroup" successfully extended
[[email protected] ~]# vgextend VolGroup /dev/sdb2
Volume group "VolGroup" successfully extended 說明: 如果出現下述無法挂載實體磁盤到卷組中的資訊, 說明這塊實體磁盤已經挂載了, 需要先解除安裝, 然後再執行建立分區+卷組的操作:
[[email protected] /]# vgextend VolGroup /dev/sdb1
No physical volume label read from /dev/sdb1
Physical volume /dev/sdb1 not found
Can't open /dev/sdb1 exclusively. Mounted filesystem?
Unable to add physical volume '/dev/sdb1' to volume group 'VolGroup'. 6 擴充邏輯卷
# 擴充邏輯卷, 即擴容:
[[email protected] ~]# lvextend -l +100%FREE /dev/mapper/VolGroup-LogVol
Extending logical volume lv_root to 5.54 TiB
Logical volume lv_root successfully resized
# 上述指令是将所有的空閑空間都擴容到邏輯卷中, 也可指定擴容的大小:
lvextend -l +100G /dev/mapper/VolGroup-LogVol 7 檢視磁盤卷組資訊
[[email protected] ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 278.5G 0 disk
├─sda1 8:1 0 500M 0 part /boot
└─sda2 8:2 0 278G 0 part
├─VolGroup-LogVol (dm-0) 253:0 0 5.6T 0 lvm /
sdb 8:16 0 1.6T 0 disk
└─sdb1 8:17 0 1.6T 0 part
└─VolGroup-LogVol (dm-0) 253:0 0 5.6T 0 lvm /
sdc 8:32 0 3.7T 0 disk
├─sdc1 8:33 0 2T 0 part
│ └─VolGroup-LogVol (dm-0) 253:0 0 5.6T 0 lvm /
└─sdc2 8:34 0 1.7T 0 part
└─VolGroup-LogVol (dm-0) 253:0 0 5.6T 0 lvm / 8 調整檔案系統的大小
# CentOS 7重新讀取磁盤大小:
[[email protected] ~]# xfs_growfs /dev/mapper/VolGroup-LogVol
xfs_growfs: /dev/mapper/VolGroup-LogVol is not a mounted XFS filesystem
# 趕緊看下擴容成果吧:
[[email protected] ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-LogVol 5.5T 1.8T 3.5T 34% / # 擴容成功
tmpfs 63G 0 63G 0% /dev/shm
/dev/sda1 485M 40M 421M 9% /boot ![linux-svn解除安裝與安裝[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)