分區的過程正常：

[root@db1 /]#?fdisk -l

?

Disk /dev/sda: 21.4 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 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?????????650?????5116702+??83??Linux

/dev/sda3?????????????651?????????841?????1534207+??82??Linux swap / Solaris

[root@db1 /]# fdisk /dev/sda

?

The number of cylinders for this disk is set to 2610.

There is nothing wrong with that, but this is larger than 1024,

and could in certain setups cause problems with:

1) software that runs at boot time (e.g., old versions of LILO)

2) booting and partitioning software from other OSs

???(e.g., DOS FDISK, OS/2 FDISK)

?

Command (m for help):?n

Command action

???e???extended

???p???primary partition (1-4)

p

Selected partition?4

First cylinder (842-2610, default 842):

Using default value 842

Last cylinder or +size or +sizeM or +sizeK (842-2610, default 2610):

Using default value 2610

?

Command (m for help):?w

The partition table has been altered!

?

Calling ioctl() to re-read partition table.

?

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.

The kernel still uses the old table.

The new table will be used at the next reboot.

Syncing disks.

?

再次查看，分區已經劃好：

[root@db1 /]# fdisk -l

?

Disk /dev/sda: 21.4 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 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?????????650?????5116702+??83??Linux

/dev/sda3?????????????651?????????841?????1534207+??82??Linux swap / Solaris

/dev/sda4?????????????842????????2610????14209492+??83??Linux

?

但是格式化的時候，報錯：

[root@db1 /]# mkfs -t ext3 /dev/sda4

mke2fs 1.39 (29-May-2006)

Could not stat /dev/sda4 --- No such file or directory

?

The device apparently does not exist; did you specify it correctly?

?

?

解決方法：執行下partprobe?命令

?

???????partprobe包含在parted的rpm軟件包中。partprobe可以修改kernel中分區表，使kernel重新讀取分區表。?因此，使用該命令就可以創建分區并且在不重新啟動機器的情況下系統能夠識別這些分區。

?

查看是否安裝該命令：

[root@db1 dev]# rpm -q parted

parted-1.8.1-23.el5

?

我們執行一下該命令：

[root@db1 dev]#?partprobe

Warning: Unable to open /dev/hdc read-write (Read-only file system).??/dev/hdc has been opened read-only.

?

然后在格式化，就ok了：

[root@db1 dev]# mkfs -t ext3 /dev/sda4

mke2fs 1.39 (29-May-2006)

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

1778880 inodes, 3552373 blocks

177618 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=3640655872

109 block groups

32768 blocks per group, 32768 fragments per group

16320 inodes per group

Superblock backups stored on blocks:

????????32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208

?

Writing inode tables: done???????????????????????????

Creating journal (32768 blocks): done

Writing superblocks and filesystem accounting information: done

?

This filesystem will be automatically checked every 38 mounts or

180 days, whichever comes first.??Use tune2fs -c or -i to override.

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