逻辑卷的创建-白红宇

逻辑卷的创建

阅读量：5877 次

发布时间：2019-06-19

本文共 4607 字，大约阅读时间需要 15 分钟。

逻辑卷的创建

新建分区

[root@wangfc ~]# fdisk /dev/sdb

Device Boot Start End Blocks Id System

/dev/sdb1 1 14 112423+ 5 Extended

/dev/sdb5 1 2 16002 83 Linux

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

[root@wangfc ~]# partx -a /dev/sdb

切勿忘记

BLKPG: Device or resource busy

error adding partition 1

BLKPG: Device or resource busy

error adding partition 5

先转成物理卷

[root@wangfc ~]# pvcreate /dev/sdb5

Physical volume "/dev/sdb5" successfully created

可以指定多个磁盘

组成一个大的卷组，一个逻辑的大硬盘

[root@wangfc ~]# vgcreate

vg0

/dev/sdb5

-s

Volume group "vg0" successfully created

[ -s

是制定

的大小

]

就是物理存储的最小单元

[root@wangfc ~]# lvcreate -L 10M -n lv0 vg0

Rounding up size to full physical extent 12.00 MiB

Logical volume "lv0" created

格式化lV0

[root@wangfc ~]# mkfs.ext4 /dev/vg0/lv0

mke2fs 1.41.12 (17-May-2010)

Filesystem label=

OS type: Linux

Block size=1024 (log=0)

Fragment size=1024 (log=0)

Stride=0 blocks, Stripe width=0 blocks

3072 inodes, 12288 blocks

614 blocks (5.00%) reserved for the super user

First data block=1

Maximum filesystem blocks=12582912

2 block groups

8192 blocks per group, 8192 fragments per group

1536 inodes per group

Superblock backups stored on blocks:

8193

Writing inode tables: done

Creating journal (1024 blocks): done

Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 22 mounts or

180 days, whichever comes first. Use tune2fs -c or -i to override.

[root@wangfc ~]# blkid

【查看所属的文件系统的

UUIID

】

/dev/sda1: UUID="d5b0378a-608e-416d-b865-493f97f359fc" TYPE="ext4"

/dev/sda2: UUID="8b08564a-71b6-4d44-a102-dea5ec8ded61" TYPE="ext4"

/dev/sda3: UUID="dea6d68a-4ae0-4f6f-a8d4-1641d354da38" TYPE="swap"

/dev/sdb5: UUID="y5cQXn-Jllq-1XdQ-RSQm-dxIs-wILO-0JMWoP" TYPE="LVM2_member"

/dev/mapper/vg0-lv0: UUID="c4505955-3978-4854-96be-16291cc5bc2b" TYPE="ext4"

创建挂载点

[root@wangfc ~]# mkdir /mnt/lvm0

[root@wangfc ~]# mount /dev/mapper/vg0-lv0 /mnt/lvm0

[root@wangfc ~]# df -TH

Filesystem Type Size Used Avail Use% Mounted on

/dev/sda2 ext4 49G 4.4G 42G 10% /

tmpfs tmpfs 1.1G 91k 1.1G 1% /dev/shm

/dev/sda1 ext4 305M 32M 258M 11% /boot

/dev/mapper/vg0-lv0

ext4 13M 1.2M 11M 11% /mnt/lvm0

开机自动挂载

[root@wangfc ~]# vim /etc/fstab

UUID=c4505955-3978-4854-96be-16291cc5bc2b /mnt/lvm0 ext4 defaults 0 0

[root@wangfc ~]# umount /mnt/lvm0/

[root@wangfc ~]# df -TH

Filesystem Type Size Used Avail Use% Mounted on

/dev/sda2 ext4 49G 4.4G 42G 10% /

tmpfs tmpfs 1.1G 91k 1.1G 1% /dev/shm

/dev/sda1 ext4 305M 32M 258M 11% /boot

[root@wangfc ~]# mount

/dev/sda2 on / type ext4 (rw)

proc on /proc type proc (rw)

sysfs on /sys type sysfs (rw)

devpts on /dev/pts type devpts (rw,gid=5,mode=620)

tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0")

/dev/sda1 on /boot type ext4 (rw)

none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)

vmware-vmblock on /var/run/vmblock-fuse type fuse.vmware-vmblock (rw,nosuid,nodev,default_permissions,allow_other)

/etc/named on /var/named/chroot/etc/named type none (rw,bind)

/var/named on /var/named/chroot/var/named type none (rw,bind)

/etc/named.conf on /var/named/chroot/etc/named.conf type none (rw,bind)

/etc/named.rfc1912.zones on /var/named/chroot/etc/named.rfc1912.zones type none (rw,bind)

/etc/rndc.key on /var/named/chroot/etc/rndc.key type none (rw,bind)

/usr/lib64/bind on /var/named/chroot/usr/lib64/bind type none (rw,bind)

/etc/named.iscdlv.key on /var/named/chroot/etc/named.iscdlv.key type none (rw,bind)

[root@wangfc ~]# mount -a

mount: no medium found on /dev/sr0