[root@localhost ~]# fdisk -l

Disk /dev/sda: 4294 MB, 4294967296 bytes 255 heads, 63 sectors/track, 522 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes    Device Boot      Start         End      Blocks   Id  System /dev/sda1   *           1          13      104391   83  Linux /dev/sda2              14         522     4088542+  83  Linux

Disk /dev/sdb: 3221 MB, 3221225472 bytes

255 heads, 63 sectors/track, 391 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdb doesn't contain a valid partition table

Disk /dev/sdc: 3221 MB, 3221225472 bytes 255 heads, 63 sectors/track, 391 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes    Device Boot      Start         End      Blocks   Id  System /dev/sdc1   *           1         131     1052226   82  Linux swap / Solaris

Disk /dev/sdd: 3221 MB, 3221225472 bytes

255 heads, 63 sectors/track, 391 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes    Device Boot      Start         End      Blocks   Id  System

[root@localhost ~]# fdisk /dev/sdb

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel. Changes will remain in memory only, until you decide to write them. After that, of course, the previous content won't be recoverable. Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) Command (m for help): p Disk /dev/sdb: 3221 MB, 3221225472 bytes 255 heads, 63 sectors/track, 391 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes    Device Boot      Start         End      Blocks   Id  System Command (m for help): n

Command action    e   extended    p   primary partition (1-4)p

Partition number (1-4): 1 First cylinder (1-391, default 1): Using default value 1 Last cylinder or +size or +sizeM or +sizeK (1-391, default 391): 150 Command (m for help): p Disk /dev/sdb: 3221 MB, 3221225472 bytes 255 heads, 63 sectors/track, 391 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes    Device Boot      Start         End      Blocks   Id  System /dev/sdb1               1         150     1204843+  83  Linux

Command (m for help): n

Command action    e   extended    p   primary partition (1-4)e --建立拓展分区

Partition number (1-4): 4 First cylinder (151-391, default 151): Using default value 151 Last cylinder or +size or +sizeM or +sizeK (151-391, default 391): Using default value 391 Command (m for help): p Disk /dev/sdb: 3221 MB, 3221225472 bytes 255 heads, 63 sectors/track, 391 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes    Device Boot      Start         End      Blocks   Id  System /dev/sdb1               1         150     1204843+  83  Linux /dev/sdb4             151         391     1935832+   5  Extended Command (m for help): n Command action    l   logical (5 or over)    p   primary partition (1-4)l   --在拓展分区中建立逻辑分区，因为拓展分区是不能够直接被使用的，只有做成拓展分区时，才能够被使用。

First cylinder (151-391, default 151): Using default value 151 Last cylinder or +size or +sizeM or +sizeK (151-391, default 391): 250 Command (m for help): p Disk /dev/sdb: 3221 MB, 3221225472 bytes 255 heads, 63 sectors/track, 391 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes    Device Boot      Start         End      Blocks   Id  System /dev/sdb1               1         150     1204843+  83  Linux /dev/sdb4             151         391     1935832+   5  Extended /dev/sdb5             151         250      803218+  83  Linux Command (m for help): n Command action    l   logical (5 or over)    p   primary partition (1-4)l --在拓展分区中建立逻辑分区

First cylinder (251-391, default 251): Using default value 251 Last cylinder or +size or +sizeM or +sizeK (251-391, default 391): Using default value 391 Command (m for help): p Disk /dev/sdb: 3221 MB, 3221225472 bytes 255 heads, 63 sectors/track, 391 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes    Device Boot      Start         End      Blocks   Id  System /dev/sdb1               1         150     1204843+  83  Linux /dev/sdb4             151         391     1935832+   5  Extended /dev/sdb5             151         250      803218+  83  Linux /dev/sdb6             251         391     1132551   83  Linux

Command (m for help): w  ---保存

The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. [root@localhost ~]# fdisk -l Disk /dev/sda: 4294 MB, 4294967296 bytes 255 heads, 63 sectors/track, 522 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes    Device Boot      Start         End      Blocks   Id  System /dev/sda1   *           1          13      104391   83  Linux /dev/sda2              14         522     4088542+  83  Linux

Disk /dev/sdb: 3221 MB, 3221225472 bytes

255 heads, 63 sectors/track, 391 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes    Device Boot      Start         End      Blocks   Id  System /dev/sdb1               1         150     1204843+  83  Linux

/dev/sdb4             151         391     1935832+   5  Extended

/dev/sdb5             151         250      803218+  83  Linux

/dev/sdb6             251         391     1132551   83  Linux

[root@localhost ~]#