将GPT转换MBR会格式化硬盘：
[root@node1 ~]# parted /dev/sda mklabel msdos
Warning: Partition(s) on /dev/sda are being used.
Ignore/Cancel? ignore
Warning: The existing disk label on /dev/sda will be destroyed and all data on this disk will be lost. Do you want to continue?
Yes/No? no
GPT转换MBR会格式化so，需要从新分区
[root@node1 ~]# parted
GNU Parted 2.1
Using /dev/sda
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mkpart 创建
Partition name? []? KVM2 名称叫KVM2
File system type? [ext2]? ext4 格式为ext4
Start? 501GB 起始位置501GB
End? 896GB 结束位置896GB
Warning: WARNING: the kernel failed to re-read the partition table on /dev/sda (Device or resource busy). As a result, it may not reflect all of your changes
until after reboot.
(parted) p
Model: IBM ServeRAID M5110e (scsi)
Disk /dev/sda: 897GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Number Start End Size File system Name Flags
1 1049kB 211MB 210MB fat16 boot
2 211MB 735MB 524MB ext4
3 735MB 21.7GB 21.0GB ext4
4 21.7GB 42.7GB 21.0GB ext4
5 42.7GB 53.2GB 10.5GB ext4
6 53.2GB 61.6GB 8389MB linux-swap(v1)
7 61.6GB 500GB 438GB ext4 KVM
8 501GB 896GB 395GB KVM2
(parted) q
Information: You may need to update /etc/fstab
查看下分区，是否一被加载，如果没有则强制加载
[root@node1 ~]# partx -l /dev/sda
# 1: 2048- 411647 ( 409600 sectors, 209 MB)
# 2: 411648- 1435647 ( 1024000 sectors, 524 MB)
# 3: 1435648- 42395647 ( 40960000 sectors, 20971 MB)
# 4: 42395648- 83355647 ( 40960000 sectors, 20971 MB)
# 5: 83355648-103835647 ( 20480000 sectors, 10485 MB)
# 6: 103835648-120219647 ( 16384000 sectors, 8388 MB)
# 7: 120219648-976562175 (856342528 sectors, 438447 MB)
# 8: 978515968-1749999615 (771483648 sectors, 394999 MB)
强制内核重读分区表
[root@node1 ~]# partx -a /dev/sda
BLKPG: Device or resource busy
error adding partition 1
BLKPG: Device or resource busy
error adding partition 2
BLKPG: Device or resource busy
error adding partition 3
BLKPG: Device or resource busy
error adding partition 4
BLKPG: Device or resource busy
error adding partition 5
BLKPG: Device or resource busy
error adding partition 6
BLKPG: Device or resource busy
error adding partition 7
BLKPG: Device or resource busy
error adding partition 8
格式化分区
[root@node1 ~]# mke2fs -t ext4 /dev/sda8
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=1 blocks, Stripe width=0 blocks
24109056 inodes, 96435456 blocks
4821772 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
2943 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, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 37 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
[root@node1 ~]#
查看分区UUID
[root@node1 ~]# blkid
/dev/sda5: UUID="af26c309-0fe0-4b87-9127-69a9448be0e0" TYPE="ext4"
/dev/sda1: SEC_TYPE="msdos" UUID="60E4-D99C" TYPE="vfat"
/dev/sda2: UUID="0a298063-c54a-4e12-ac3f-886fc8f61bd6" TYPE="ext4"
/dev/sda3: UUID="62fd59e9-46bf-471c-8660-ba8296ddbe97" TYPE="ext4"
/dev/sda4: UUID="88ee1c0c-f644-4d6b-9d9c-ea2772a814e3" TYPE="ext4"
/dev/sda6: UUID="172977b9-2d1b-49c3-9f7c-73b73684dbdc" TYPE="swap"
/dev/sda7: UUID="a51c6276-afc4-44e9-b0e7-bbd1286dd2d2" TYPE="ext4"
/dev/sda8: UUID="6fb79176-5eeb-4a80-82c8-e221db87abeb" TYPE="ext4"
开机挂载
[root@node1 kvm]# cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Mon Nov 30 14:01:08 2015
#
# 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
#
UUID=62fd59e9-46bf-471c-8660-ba8296ddbe97 / ext4 defaults 1 1
UUID=0a298063-c54a-4e12-ac3f-886fc8f61bd6 /boot ext4 defaults 1 2
UUID=60E4-D99C /boot/efi vfat umask=0077,shortname=winnt 0 0
UUID=88ee1c0c-f644-4d6b-9d9c-ea2772a814e3 /usr/local ext4 defaults 1 2
UUID=af26c309-0fe0-4b87-9127-69a9448be0e0 /var ext4 defaults 1 2
UUID=172977b9-2d1b-49c3-9f7c-73b73684dbdc 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
UUID="a51c6276-afc4-44e9-b0e7-bbd1286dd2d2" /kvm ext4 defaults 1 1
UUID="6fb79176-5eeb-4a80-82c8-e221db87abeb" /backup ext4 defaults 1 1
