虚拟机LUN扩大后,重新分区

[root@ywcrmdb ~]# fdisk -l





Disk /dev/sda: 751.6 GB, 751619276800 bytes

255 heads, 63 sectors/track, 91379 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: 0x000923d9





   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       65271   523774976   8e  Linux LVM





Disk /dev/mapper/vg_ywcrmdb-lv_root: 473.1 GB, 473117491200 bytes

255 heads, 63 sectors/track, 57519 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_ywcrmdb-lv_root doesn't contain a valid partition table





Disk /dev/mapper/vg_ywcrmdb-lv_swap: 10.6 GB, 10552868864 bytes

255 heads, 63 sectors/track, 1282 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_ywcrmdb-lv_swap doesn't contain a valid partition table





Disk /dev/mapper/vg_ywcrmdb-lv_home: 52.7 GB, 52672069632 bytes

255 heads, 63 sectors/track, 6403 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_ywcrmdb-lv_home doesn't contain a valid partition table





扩展后容量变为751G，需要划分余下未分配的空间

fdisk /dev/sda

Command (m for help): n

Command action

   e   extended

   p   primary partition (1-4)

p

Partition number (1-4): 3

First cylinder (65271-91379, default 65271): 

Using default value 65271

Last cylinder, +cylinders or +size{K,M,G} (65271-91379, default 91379): 

Using default value 91379





Command (m for help): w

The partition table has been altered!





Calling ioctl() to re-read partition table.





WARNING: Re-reading the partition table failed with error 16: 设备或资源忙.

The kernel still uses the old table. The new table will be used at

the next reboot or after you run partprobe(8) or kpartx(8)

Syncing disks.









重启主机后,多出了sda3

[root@ywcrmdb dev]# ls -ltr sd*

brw-rw---- 1 root disk 8, 3  4月 28 11:23 sda3

brw-rw---- 1 root disk 8, 2  4月 28 11:23 sda2

brw-rw---- 1 root disk 8, 1  4月 28 11:23 sda1

brw-rw---- 1 root disk 8, 0  4月 28 11:24 sda









[root@ywcrmdb dev]# pvcreate /dev/sda3

  Writing physical volume data to disk "/dev/sda3"

  Physical volume "/dev/sda3" successfully created





[root@ywcrmdb dev]# pvdisplay 

  --- Physical volume ---

  PV Name               /dev/sda2

  VG Name               vg_ywcrmdb

  PV Size               499.51 GiB / not usable 3.00 MiB

  Allocatable           yes (but full)

  PE Size               4.00 MiB

  Total PE              127874

  Free PE               0

  Allocated PE          127874

  PV UUID               qoLfbb-Vsu5-damB-VtNI-Rn3L-PNF5-yvWsEk

   

  "/dev/sda3" is a new physical volume of "200.00 GiB"

  --- NEW Physical volume ---

  PV Name               /dev/sda3

  VG Name               

  PV Size               200.00 GiB

  Allocatable           NO

  PE Size               0   

  Total PE              0

  Free PE               0

  Allocated PE          0

  PV UUID               P2mUfD-BO2J-Oinz-av6G-Oz1H-UYRD-hGciOE

   

[root@ywcrmdb dev]# vgextend  vg_ywcrmdb /dev/sda3

  Volume group "vg_ywcrmdb" successfully extended





[root@ywcrmdb dev]# vgdisplay 

  --- Volume group ---

  VG Name               vg_ywcrmdb

  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               699.50 GiB

  PE Size               4.00 MiB

  Total PE              179073

  Alloc PE / Size       127874 / 499.51 GiB

  Free  PE / Size       51199 / 200.00 GiB

  VG UUID               5FA4n9-p3o6-TeR4-KbwO-Bg6J-NB8Z-JXo9UX





[root@ywcrmdb dev]# lvextend -L +100G /dev/mapper/vg_ywcrmdb-lv_root 

  Extending logical volume lv_root to 540.62 GiB

  Logical volume lv_root successfully resized