linux新建立LVM磁盘卷流程说明
[root@RAC1 ~]# fdisk -l
Disk /dev/sda: 85.9 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 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: 0x000c9810
Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 10444 83373056 8e Linux LVM ----sdba已经有逻辑编号了
Disk /dev/sdb: 17.2 GB, 17179869184 bytes ----可以看出sdb还未分配逻辑编号
255 heads, 63 sectors/track, 2088 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
Disk /dev/mapper/vg_rac1-lv_root: 53.7 GB, 53687091200 bytes
255 heads, 63 sectors/track, 6527 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
Disk /dev/mapper/vg_rac1-lv_swap: 4227 MB, 4227858432 bytes
255 heads, 63 sectors/track, 514 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
Disk /dev/mapper/vg_rac1-lv_home: 27.5 GB, 27455913984 bytes
255 heads, 63 sectors/track, 3337 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
[root@RAC1 ~]# fdisk /dev/sdb ---对sdb磁盘进行逻辑分区
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x726b3678.
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: 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
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-2088, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-2088, default 2088):
Using default value 2088
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!
Clling ioctl() to re-read partition table.
Syncing disks.
[root@RAC1 ~]# mkfs -t ext4 -c /dev/sdb1 ----将sdb1格式化ext4磁盘格式
mke2fs 1.41.12 (17-May-2010)
文件系统标签=
操作系统:Linux
块大小=4096 (log=2)
分块大小=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
1048576 inodes, 4192957 blocks
209647 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=4294967296
128 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000
Checking for bad blocks (read-only test): 完成
正在写入inode表: 完成
Creating journal (32768 blocks): 完成
Writing superblocks and filesystem accounting information: 完成
This filesystem will be automatically checked every 26 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
[root@RAC1 ~]# pvdisplay ----查询PV逻辑块
--- Physical volume ---
PV Name /dev/sda2
VG Name vg_rac1
PV Size 79.51 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 20354
Free PE 0
Allocated PE 20354
PV UUID YpRRUv-QZFd-OCUm-Qpe6-CbOc-qJ6j-sj6nMP
[root@RAC1 ~]# pvcreate /dev/sdb1 ----将sdb1创建位PV逻辑快
Physical volume "/dev/sdb1" successfully created
[root@RAC1 ~]# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name vg_rac1
PV Size 79.51 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 20354
Free PE 0
Allocated PE 20354
PV UUID YpRRUv-QZFd-OCUm-Qpe6-CbOc-qJ6j-sj6nMP
"/dev/sdb1" is a new physical volume of "15.99 GiB"
--- NEW Physical volume ---
PV Name /dev/sdb1
VG Name
PV Size 15.99 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID TRZ31M-3pVV-1uhx-Wz5L-zF0O-fz3D-tH5tjg
[root@RAC1 ~]#
[root@RAC1 ~]# vgcreate data_vg /dev/sdb1 ----创建vg磁盘组名字为data_vg
Volume group "data_vg" successfully created
[root@RAC1 ~]# vgdisplay
--- Volume group ---
VG Name data_vg
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 15.99 GiB
PE Size 4.00 MiB
Total PE 4094
Alloc PE / Size 0 / 0
Free PE / Size 4094 / 15.99 GiB
VG UUID cBX1rU-PrU4-dJAy-Pqi2-pX6e-tlHo-19HSwZ
--- Volume group ---
VG Name vg_rac1
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 3
Max PV 0
Cur PV 1
Act PV 1
VG Size 79.51 GiB
PE Size 4.00 MiB
Total PE 20354
Alloc PE / Size 20354 / 79.51 GiB
Free PE / Size 0 / 0
VG UUID 3STo0z-xIfp-rHDO-O4tp-BTW2-B4Qj-uJkvNm
[root@RAC1 ~]# pvdisplay -----查看pv逻辑块信息
--- Physical volume ---
PV Name /dev/sdb1
VG Name data_vg
PV Size 15.99 GiB / not usable 2.74 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 4094
Free PE 4094
Allocated PE 0
PV UUID TRZ31M-3pVV-1uhx-Wz5L-zF0O-fz3D-tH5tjg
--- Physical volume ---
PV Name /dev/sda2
VG Name vg_rac1
PV Size 79.51 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 20354
Free PE 0
Allocated PE 20354
PV UUID YpRRUv-QZFd-OCUm-Qpe6-CbOc-qJ6j-sj6nMP
[root@RAC1 ~]#
[root@RAC1 ~]#
[root@RAC1 ~]# vgextend data_vg /dev/sdb1 -----将sdb1的PV磁盘块添加到vg磁盘组
Physical volume '/dev/sdb1' is already in volume group 'data_vg'
Unable to add physical volume '/dev/sdb1' to volume group 'data_vg'.
[root@RAC1 ~]# vgdisplay ---查看已有的vg磁盘组
--- Volume group ---
VG Name data_vg
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 15.99 GiB
PE Size 4.00 MiB
Total PE 4094
Alloc PE / Size 0 / 0
Free PE / Size 4094 / 15.99 GiB
VG UUID cBX1rU-PrU4-dJAy-Pqi2-pX6e-tlHo-19HSwZ
--- Volume group ---
VG Name vg_rac1
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 3
Max PV 0
Cur PV 1
Act PV 1
VG Size 79.51 GiB
PE Size 4.00 MiB
Total PE 20354
Alloc PE / Size 20354 / 79.51 GiB
Free PE / Size 0 / 0
VG UUID 3STo0z-xIfp-rHDO-O4tp-BTW2-B4Qj-uJkvNm
[root@RAC1 ~]#
[root@RAC1 ~]# lvdisplay
--- Logical volume ---
LV Path /dev/vg_rac1/lv_root
LV Name lv_root
VG Name vg_rac1
LV UUID 6UVdUJ-x7fB-6C40-KhKb-zluq-1Zjc-OAl12C
LV Write Access read/write
LV Creation host, time RAC1, 2017-02-07 09:09:50 +0800
LV Status available
# open 1
LV Size 50.00 GiB
Current LE 12800
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Path /dev/vg_rac1/lv_home
LV Name lv_home
VG Name vg_rac1
LV UUID uABSyv-iebN-DMNy-XVfe-IfYR-DjwY-a9en2z
LV Write Access read/write
LV Creation host, time RAC1, 2017-02-07 09:09:54 +0800
LV Status available
# open 1
LV Size 25.57 GiB
Current LE 6546
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Logical volume ---
LV Path /dev/vg_rac1/lv_swap
LV Name lv_swap
VG Name vg_rac1
LV UUID tgC9L1-ZFcp-e1kz-rclV-vlkV-ui9l-NjGroT
LV Write Access read/write
LV Creation host, time RAC1, 2017-02-07 09:09:56 +0800
LV Status available
# open 1
LV Size 3.94 GiB
Current LE 1008
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
[root@RAC1 ~]# lvcreate -n share -L 10G data_vg -----从vg磁盘组划出空间
Logical volume "share" created
[root@RAC1 ~]# lvdisplay ----查看已有的lv分区
--- Logical volume ---
LV Path /dev/data_vg/share
LV Name share
VG Name data_vg
LV UUID ovum77-AgIo-8pFt-p8xp-E9XV-VTW3-9IjPfT
LV Write Access read/write
LV Creation host, time RAC1, 2017-02-20 14:53:28 +0800
LV Status available
# open 0
LV Size 10.00 GiB
Current LE 2560
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:3
--- Logical volume ---
LV Path /dev/vg_rac1/lv_root
LV Name lv_root
VG Name vg_rac1
LV UUID 6UVdUJ-x7fB-6C40-KhKb-zluq-1Zjc-OAl12C
LV Write Access read/write
LV Creation host, time RAC1, 2017-02-07 09:09:50 +0800
LV Status available
# open 1
LV Size 50.00 GiB
Current LE 12800
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Path /dev/vg_rac1/lv_home
LV Name lv_home
VG Name vg_rac1
LV UUID uABSyv-iebN-DMNy-XVfe-IfYR-DjwY-a9en2z
LV Write Access read/write
LV Creation host, time RAC1, 2017-02-07 09:09:54 +0800
LV Status available
# open 1
LV Size 25.57 GiB
Current LE 6546
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Logical volume ---
LV Path /dev/vg_rac1/lv_swap
LV Name lv_swap
VG Name vg_rac1
LV UUID tgC9L1-ZFcp-e1kz-rclV-vlkV-ui9l-NjGroT
LV Write Access read/write
LV Creation host, time RAC1, 2017-02-07 09:09:56 +0800
LV Status available
# open 1
LV Size 3.94 GiB
Current LE 1008
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
[root@RAC1 ~]#
[root@RAC1 ~]# lvs -----查看lv逻辑分区信息
LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert
share data_vg -wi-a----- 10.00g
lv_home vg_rac1 -wi-ao---- 25.57g
lv_root vg_rac1 -wi-ao---- 50.00g
lv_swap vg_rac1 -wi-ao---- 3.94g
[root@RAC1 ~]# pvs -------查看pv逻辑块信息
PV VG Fmt Attr PSize PFree
/dev/sda2 vg_rac1 lvm2 a-- 79.51g 0
/dev/sdb1 data_vg lvm2 a-- 15.99g 5.99g
[root@RAC1 ~]# vgs ----查看vg磁盘组信息
VG #PV #LV #SN Attr VSize VFree
data_vg 1 1 0 wz--n- 15.99g 5.99g
vg_rac1 1 3 0 wz--n- 79.51g 0
[root@RAC1 ~]#
[root@RAC1 /]# mkfs.ext4 /dev/data_vg/share -----将磁盘格式化为系统所支持的文件类型
mke2fs 1.41.12 (17-May-2010)
文件系统标签=
操作系统:Linux
块大小=4096 (log=2)
分块大小=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
655360 inodes, 2621440 blocks
131072 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=2684354560
80 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632
正在写入inode表: 完成
Creating journal (32768 blocks): 完成
Writing superblocks and filesystem accounting information: 完成
This filesystem will be automatically checked every 32 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
[root@RAC1 /]# mount /dev/data_vg/share /bbsoft/ -----挂载到新的目录
[root@RAC1 /]# df -lh
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_rac1-lv_root 50G 4.7G 43G 11% /
tmpfs 1.9G 80K 1.9G 1% /dev/shm
/dev/sda1 485M 39M 421M 9% /boot
/dev/mapper/vg_rac1-lv_home 26G 5.0G 19G 21% /home
/dev/mapper/data_vg-share 9.9G 151M 9.2G 2% /bbsoft
[root@RAC1 /]#
[root@RAC1 ~]# vim /etc/fstab ----新增的磁盘空间，要将其修改为系统启动时自动挂载。
#
# /etc/fstab
# Created by anaconda on Tue Feb 7 09:10:36 2017
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/vg_rac1-lv_root / ext4 defaults 1 1
UUID=cf8b8b95-229f-4817-b4c4-0c78b5af93fd /boot ext4 defaults 1 2
/dev/mapper/vg_rac1-lv_home /home ext4 defaults 1 2
/dev/mapper/vg_rac1-lv_swap swap swap defaults 0 0
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/mapper/data_vg-share /bbsoft ext4 defaults 0 0
磁盘所在位置 挂载的目录 磁盘格式
~
~
"/etc/fstab" 20L, 926C 已写入
[root@RAC1 ~]# reboot -f
[root@RAC1 ~]# blkid -o value -s UUID /dev/sdb1 -----查看sdb1 的UUID多少
TRZ31M-3pVV-1uhx-Wz5L-zF0O-fz3D-tH5tjg
[root@RAC1 ~]#
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