sgdisk是linux下操作gpt分割槽的工具，就像fdisk是操作mbr分割槽的工具。關於gpt和mbr的區別請參考：
root@ceph1:~$ sgdisk --help | grep new
-n, --new=partnum:start:end
create
new partition
root@ceph1
:~# sgdisk -n 0:0:0 /dev/vdd
creating new gpt entries.
the operation has completed successfully.
root@ceph1
:~# lsblk | grep vdd
name
maj:min
rmsize
rotype
mountpoint
vdd 253:48
040g 0 disk
└─vdd1 253:49
020g 0 part
root@ceph1
:~# sgdisk -n 2:0:+5g /dev/vdd
creating new gpt entries.
the operation has completed successfully.
root@ceph1
:~# lsblk | grep vdd
name
maj:min
rmsize
rotype
mountpoint
vdd 253:48
040g 0 disk
└─vdd1 253:49
020g 0 part
└─vdd2 253:50
05g 0 part
root@ceph1
:~$ sgdisk --help | grep info
-i, --info=partnum show detailed information on partition
root@ceph1:~# sgdisk -i 1 /dev/vdd
partition guid code: 0fc63daf-8483-4772-8e79-3d69d8477de4 (linux filesystem)
partition unique guid: c7eb237f-9a8f-4938-b010-125b3d6d0d4a
first sector: 2048 (at 1024.0 kib)
last sector: 41943006 (at 20.0 gib)
partition size: 41940959 sectors (20.0 gib)
attribute flags: 0000000000000000
partition name: ''
root@ceph1
:~$ sgdisk --help | grep typecode
-t, --typecode=partnum: change partition type code
root@ceph1
:~# sgdisk -t 1:4fbd7e29-9d25-41b8-afd0-062c0ceff05d /dev/vdd
the operation has completed successfully.
root@ceph1
:~# sgdisk -i 1 /dev/vdd
partition
guid
code:
4fbd7e29-9d25-41b8-afd0-062c0ceff05d (unknown)
partition unique guid
:c7eb237f-9a8f-4938-b010-125b3d6d0d4a
first
sector:
2048 (at 1024.0
kib)
last
sector:
41943006 (at 20.0
gib)
partition
size:
41940959 sectors (20.0
gib)
attribute
flags:
0000000000000000
partition
name:
''
root@ceph1
:~$ sgdisk --help | grep change-name
-c, --change-name=partnum:name change partition's name
root@ceph1:~# sgdisk -c 1:"ceph data" /dev/vdd
the operation has completed successfully.
root@ceph1:~# sgdisk -i 1 /dev/vdd
partition guid code: 4fbd7e29-9d25-41b8-afd0-062c0ceff05d (unknown)
partition unique guid: c7eb237f-9a8f-4938-b010-125b3d6d0d4a
first sector: 2048 (at 1024.0 kib)
last sector: 41943006 (at 20.0 gib)
partition size: 41940959 sectors (20.0 gib)
attribute flags: 0000000000000000
partition name: 'ceph data'
root@ceph1
:~$ sgdisk --help | grep zap
-z, --zap zap (destroy) gpt (but not
mbr) data structures
root@ceph1:~# sgdisk -z /dev/vdd1
creating new gpt entries.
warning: the kernel is still using
the old partition table.
the new table will be used at
the next reboot.
gpt data structures destroyed! you may now partition the disk using fdisk or
other utilities.
root@ceph1:~$ sgdisk --help | grep delete
-d, --delete=partnum delete a partition
root@ceph1
:~# sgdisk -d 1 /dev/vdd
the operation has completed successfully.
root@ceph1
:~# lsblk | grep vdd
name
maj:min
rmsize
rotype
mountpoint
vdd 253:48
040g 0 disk
└─vdd2 253:50
05g 0 part
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