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[root@xpleaf ~]# fdisk -l /dev/sdb
Disk /dev/sdb:
1073
MB, 1073741824bytes
255
heads,
63
sectors/track, 130cylinders
Units = cylinders of
16065
*
512
=
8225280
bytes
Sector size (logical/physical): 512bytes /
512
bytes
I/O size (minimum/optimal):
512
bytes/
512
bytes
Disk identifier:
0x00000000
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[root@xpleaf ~]# fdisk /dev/sdb ===>直接接磁盘名就可以分区
Device contains neither a valid DOSpartition table, nor Sun, SGI or OSF disklabel
Building a
new
DOS disklabel
with
diskidentifier
0x7f3aa9cb
.
Changes will remain
in
memory only,until you decide to write them.
After that, of course, the previouscontent won't be recoverable.
Warning: invalid flag
0x0000
ofpartition table
4
will be corrected by w(rite)
WARNING: DOS-compatible mode isdeprecated. It's strongly recommended to
switch
off the mode (command
'c'
) andchange display units to
sectors (command
'u'
).
Command (m
for
help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibilityflag
d
delete
a partition ===>删除一个分区
l list known partition types ===>查看分区类型对应编号列表
m print
this
menu ===>打印此帮助菜单
n add a
new
partition ===>新建一个分区
o create a
new
empty DOSpartition table
p print the partition table ===>打印分区表
q quit without saving changes ===>退出但不保存更改
s create a
new
empty Sundisklabel
t change a partition's system id ===>更改分区类型（做LVM时需要）
u change display/entry units
v verify the partition table
w write table to disk and exit ===>将操作写入分区表并退出程序
x extra functionality (expertsonly)
Command (m
for
help): n
Command action
e extended
p primary partition (
1
-
4
)
p ===>新建一个主分区
Partition number (
1
-
4
):
1
===>指定主分区的分区号码
First cylinder (
1
-
130
,
default
1
): ===>指定分区开始的柱面号
Usingdefault value
1
Last cylinder, +cylinders or+size{K,M,G} (
1
-
130
,
default
130
): +100M
===>指定分区结束的柱面号，或者指定分区大小，让fdisk自动判断结束柱面号
Command (m
for
help): p
Disk /dev/sdb:
1073
MB, 1073741824bytes
255
heads,
63
sectors/track, 130cylinders
Units = cylinders of
16065
*
512
=
8225280
bytes
Sector size (logical/physical): 512bytes /
512
bytes
I/O size (minimum/optimal):
512
bytes/
512
bytes
Disk identifier:
0x7f3aa9cb
Device Boot Start End Blocks Id System
/dev/sdb1
1
14
112423
+
83
Linux
Command (m
for
help): n
Command action
e extended
p primary partition (
1
-
4
)
e ===>新建一个扩展分区
Partition number (
1
-
4
):
1
Partition
1
is
already defined. Delete it before re-adding it.
===>由于前面已经使用了分区号码
1
，所以这里会提示错误
Command (m
for
help): n
Command action
e extended
p primary partition (
1
-
4
)
e
Partition number (
1
-
4
):
2
First cylinder (
15
-
130
,
default
15
):
Usingdefault value
15
Last cylinder, +cylinders or+size{K,M,G} (
15
-
130
,
default
130
):
Usingdefault value
130
===>分区的开始柱面号和结束柱面号都使用默认值，即把剩余磁盘空间分配给该分区
Command (m
for
help): p
Disk /dev/sdb:
1073
MB, 1073741824bytes
255
heads,
63
sectors/track, 130cylinders
Units = cylinders of
16065
*
512
=
8225280
bytes
Sector size (logical/physical): 512bytes /
512
bytes
I/O size (minimum/optimal):
512
bytes/
512
bytes
Disk identifier:
0x7f3aa9cb
Device Boot Start End Blocks Id System
/dev/sdb1
1
14
112423
+
83
Linux
/dev/sdb2
15
130
931770
5
Extended
Command (m
for
help): n
Command action
l logical (
5
or over) ===>由于扩展分区只能有一个，上面新建扩展分区后
p primary partition (
1
-
4
) 这里就显示逻辑分区了，也可以看到fdisk命令，
p 要想新建逻辑分区，需要先新建扩展分区
Partition number (
1
-
4
):
3
No free sectors available
===>这里还想再新建一个主分区，但是提示已经没有磁盘空间剩余
Command (m
for
help): n
Command action
l logical (
5
or over)
p primary partition (
1
-
4
)
l ===>新建一个逻辑分区
First cylinder (
15
-
130
,
default
15
):
Usingdefault value
15
Last cylinder, +cylinders or+size{K,M,G} (
15
-
130
,
default
130
): +400M
Command (m
for
help): p
Disk /dev/sdb:
1073
MB, 1073741824bytes
255
heads,
63
sectors/track, 130cylinders
Units = cylinders of
16065
*
512
=
8225280
bytes
Sector size (logical/physical): 512bytes /
512
bytes
I/O size (minimum/optimal):
512
bytes/
512
bytes
Disk identifier:
0x7f3aa9cb
Device Boot Start End Blocks Id System
/dev/sdb1
1
14
112423
+
83
Linux
/dev/sdb2
15
130
931770
5
Extended
/dev/sdb5
15
66
417658
+
83
Linux
Command (m
for
help): n
Command action
l logical (
5
or over)
p primary partition (
1
-
4
)
l
First cylinder (
67
-
130
,
default
67
):
Usingdefault value
67
Last cylinder, +cylinders or+size{K,M,G} (
67
-
130
,
default
130
):
Usingdefault value
130
Command (m
for
help): p
Disk /dev/sdb:
1073
MB, 1073741824bytes
255
heads,
63
sectors/track, 130cylinders
Units = cylinders of
16065
*
512
=
8225280
bytes
Sector size (logical/physical): 512bytes /
512
bytes
I/O size (minimum/optimal):
512
bytes/
512
bytes
Disk identifier:
0x7f3aa9cb
Device Boot Start End Blocks Id System
/dev/sdb1
1
14
112423
+
83
Linux
/dev/sdb2
15
130
931770
5
Extended
/dev/sdb5
15
66
417658
+
83
Linux
/dev/sdb6
67
130
514048
+
83
Linux
Command (m
for
help): w ===>保存更改
The partition table has been altered!
Calling ioctl() to re-read partitiontable.
Syncing disks.
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[root@xpleaf ~]# partprobe /dev/sdb
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[root@xpleaf ~]# mkfs.ext4 /dev/sdb
sdb sdb1 sdb2 sdb5 sdb6
[root@xpleaf ~]# mkfs.ext4 /dev/sdb1
……
This filesystem will be automaticallychecked every
31
mounts or
180
days, whichever comes first. Use tune2fs -c or -i to
override
.
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[root@xpleaf ~]# tune2fs -c -
1
/dev/sdb1
tune2fs
1.41
.
12
(
17
-May-
2010
)
Setting maximal mount count to -
1
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[root@xpleaf ~]# mount /dev/sdb1 /mnt
[root@xpleaf ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3
9
.2G
1
.8G
7
.0G
21
% /
tmpfs 937M
0
937M
0
% /dev/shm
/dev/sda1 194M 34M 151M
19
% /boot
/dev/sdb1 107M
5
.6M 96M
6
% /mnt
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n
p
1
0
100M
w
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fdisk /dev/hda < fdiskcmd.txt
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