RHCSA-扩大磁盘分区

扩大磁盘分区

扩展逻辑卷mylv大小至700M

[root@server0 ~]# fdisk /dev/vdb             ////进入/dev/vdb磁盘

Command (m for help): n           ////创建分区

Partition type:

   p   primary (1 primary, 0 extended, 3 free)

   e   extended

Select (default p): e           ////选择e，创建逻辑分区

Partition number (2-4, default 2):

First sector (1026048-20971519, default 1026048):

Using default value 1026048

Last sector, +sectors or +size{K,M,G} (1026048-20971519, default 20971519):          ////将剩下的所有空间全部划给逻辑分区

Using default value 20971519

Partition 2 of type Extended and of size 9.5 GiB is set

 

Command (m for help): n          ////创建分区

Partition type:

   p   primary (1 primary, 1 extended, 2 free)

   l   logical (numbered from 5)

Select (default p): l            ////选择l，从逻辑分区中创建一个扩展分区

Adding logical partition 5

First sector (1028096-20971519, default 1028096):

Using default value 1028096

Last sector, +sectors or +size{K,M,G} (1028096-20971519, default 20971519): +600M      ////设置该扩展分区大小600M

Partition 5 of type Linux and of size 600 MiB is set

 

Command (m for help): t           ////修改分区类型

Partition number (1,2,5, default 5): 5 

Hex code (type L to list all codes): 8e          ////83为linux类型、8e为linux LVM类型，82为swap类型

Changed type of partition 'Linux' to 'Linux LVM'

 

Command (m for help): w                             ////保存退出

 [root@server0 ~]# partprobe /dev/vdb           ////确认磁盘

 [root@server0 ~]# pvcreate /dev/vdb5           ////创建物理卷

  Physical volume "/dev/vdb5" successfully created

 [root@server0 ~]# pvs

  PV         VG   Fmt  Attr PSize   PFree  

  /dev/vdb1  myvg lvm2 a--  496.00m 196.00m

  /dev/vdb5            lvm2 a--  600.00m 600.00m

 [root@server0 ~]# vgextend myvg /dev/vdb5          ////将物理卷/dev/vdb5扩展至卷组myvg

  Volume group "myvg" successfully extended

 [root@server0 ~]# vgs

  VG   #PV #LV #SN Attr   VSize VFree  

  myvg   2   1   0 wz--n- 1.07g 792.00m

[root@server0 ~]# lvextend -L +400M /dev/myvg/mylv        ////扩展逻辑卷mylv，扩大400M

  Extending logical volume mylv to 700.00 MiB

  Logical volume mylv successfully resized

 [root@server0 ~]# lvs

  LV   VG   Attr       LSize   Pool Origin Data%  Move Log Cpy%Sync Convert

  mylv myvg -wi-ao---- 700.00m                                             

[root@server0 ~]# resize2fs /dev/myvg/mylv       ////确认扩展

resize2fs 1.42.9 (28-Dec-2013)

Filesystem at /dev/myvg/mylv is mounted on /mnt/ceshi; on-line resizing required

old_desc_blocks = 3, new_desc_blocks = 6

The filesystem on /dev/myvg/mylv is now 716800 blocks long.

 [root@server0 ~]# df -h