gdisk分区工具
指尖二进制 • 1 年前 • 914 次点击 • LINUX
gdisk主要是用划分容量大于 2T 的硬盘。大于2T fdisk搞不定
两种类型的分区表：GPT 和 MBR；MBR不支持4T以上
GPT分区：
GPT，全局唯一表示分区表（GUID Partition Table）,它使用128位GUID来唯一表示没个磁盘和分区，与MBR存在单一故障点不同，GPT提供分区表信息的冗余，一个在磁盘头部一个在磁盘尾部；它通过CRC晓燕和来检测GPT头和分区表中的错误与损坏；默认一个硬盘支持128个分区
例：对sdb做gpt分区，创建一个sdb1
[root@localhost ~]# yum install -y gdisk #安装gdisk
[root@localhost ~]# gdisk /dev/sdb #创建新分区
GPT fdisk (gdisk) version 0.8.6
Partition table scan:
MBR: MBR only
BSD: not present
APM: not present
GPT: not present
***************************************************************
Found invalid GPT and valid MBR; converting MBR to GPT format.
THIS OPERATION IS POTENTIALLY DESTRUCTIVE! Exit by typing 'q' if
you don't want to convert your MBR partitions to GPT format!
***************************************************************
###发现无效的GPT和有效的MBR；将MBR转换为GPT格式。
###这个操作可能是破坏性的！如果键入“q”，退出
###你不想把你的MBR分区转换成GPT格式！
Command (? for help): ? #查看帮助（和fdisk一样）
b back up GPT data to a file
c change a partition's name
d delete a partition
i show detailed information on a partition
l list known partition types
n add a new partition
o create a new empty GUID partition table (GPT)
p print the partition table
q quit without saving changes
r recovery and transformation options (experts only)
s sort partitions
t change a partition's type code
v verify disk
w write table to disk and exit
x extra functionality (experts only)
? print this menu
Command (? for help): p #查看分区表信息
Disk /dev/sdb: 41943040 sectors, 20.0 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): F76E737D-24D4-4775-ACE5-15113DCB13F3
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 41943006
Partitions will be aligned on 2048-sector boundaries
Total free space is 31457213 sectors (15.0 GiB)
Number Start (sector) End (sector) Size Code Name
1 2048 10487807 5.0 GiB 8300 Linux filesystem
Command (? for help): d #删除分区
Using 1
Command (? for help): p #查看分区表信息
Disk /dev/sdb: 41943040 sectors, 20.0 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): F76E737D-24D4-4775-ACE5-15113DCB13F3
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 41943006
Partitions will be aligned on 2048-sector boundaries
Total free space is 41942973 sectors (20.0 GiB)
Number Start (sector) End (sector) Size Code Name
Command (? for help): n #新建分区
Partition number (1-128, default 1): #默认
First sector (34-41943006, default = 2048) or {+-}size{KMGTP}: #默认
Last sector (2048-41943006, default = 41943006) or {+-}size{KMGTP}: +5G #分区大小
Current type is 'Linux filesystem'
Hex code or GUID (L to show codes, Enter = 8300): l
0700 Microsoft basic data 0c01 Microsoft reserved 2700 Windows RE
4200 Windows LDM data 4201 Windows LDM metadata 7501 IBM GPFS
7f00 ChromeOS kernel 7f01 ChromeOS root 7f02 ChromeOS reserved
8200 Linux swap 8300 Linux filesystem 8301 Linux reserved
8e00 Linux LVM a500 FreeBSD disklabel a501 FreeBSD boot
a502 FreeBSD swap a503 FreeBSD UFS a504 FreeBSD ZFS
a505 FreeBSD Vinum/RAID a580 Midnight BSD data a581 Midnight BSD boot
a582 Midnight BSD swap a583 Midnight BSD UFS a584 Midnight BSD ZFS
a585 Midnight BSD Vinum a800 Apple UFS a901 NetBSD swap
a902 NetBSD FFS a903 NetBSD LFS a904 NetBSD concatenated
a905 NetBSD encrypted a906 NetBSD RAID ab00 Apple boot
af00 Apple HFS/HFS+ af01 Apple RAID af02 Apple RAID offline
af03 Apple label af04 AppleTV recovery af05 Apple Core Storage
be00 Solaris boot bf00 Solaris root bf01 Solaris /usr & Mac Z
bf02 Solaris swap bf03 Solaris backup bf04 Solaris /var
bf05 Solaris /home bf06 Solaris alternate se bf07 Solaris Reserved 1
bf08 Solaris Reserved 2 bf09 Solaris Reserved 3 bf0a Solaris Reserved 4
bf0b Solaris Reserved 5 c001 HP-UX data c002 HP-UX service
ed00 Sony system partitio ef00 EFI System ef01 MBR partition scheme
ef02 BIOS boot partition fb00 VMWare VMFS fb01 VMWare reserved
fc00 VMWare kcore crash p fd00 Linux RAID
Hex code or GUID (L to show codes, Enter = 8300): #可以是默认，可以是8200、8300、8e00
Changed type of partition to 'Linux filesystem'
Command (? for help): w #保存操作并退出
Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
PARTITIONS!!
Do you want to proceed? (Y/N): y #确定保存
OK; writing new GUID partition table (GPT) to /dev/sdb.
Warning: The kernel is still using the old partition table.
The new table will be used at the next reboot.
The operation has completed successfully.[root@localhost ~]# ls /dev/sdb*
/dev/sdb /dev/sdb1
[root@localhost ~]# mkfs.ext4 /dev/sdb1 #格式化
mke2fs 1.42.9 (28-Dec-2013)
/dev/sdb1 已经挂载;will not make a 文件系统 here!
[root@localhost ~]# umount /dev/sdb1
[root@localhost ~]# mkfs.ext4 /dev/sdb1
mke2fs 1.42.9 (28-Dec-2013)
文件系统标签=
OS type: Linux
块大小=4096 (log=2)
分块大小=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
327680 inodes, 1310720 blocks
65536 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=1342177280
40 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
Allocating group tables: 完成
正在写入inode表: 完成
Creating journal (32768 blocks): 完成
Writing superblocks and filesystem accounting information: 完成