Linux查看已經分好的區
[root@linuxidc ~]# fdisk -l /dev/sda
Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280bytes
Sector size (logical/physical): 512 bytes /512 bytes
I/O size (minimum/optimal): 512 bytes / 512bytes
Disk identifier: 0x7d57cb1f
Device Boot Start End Blocks Id System
/dev/sda1 1 2610 20964793+ 5 Extended
/dev/sda5 1 128 1028097 83 Linux
/dev/sda6 129 256 1028128+ 83 Linux
/dev/sda7 257 384 1028128+ 83 Linux
格式化新分區的時候，報錯，提示下面的錯誤，沒有這個文件或目錄。
Could not stat /dev/sda7 --- No such fileor directory
The device apparently does not exist; didyou specify it correctly?
[root@linuxidc ~]# mke2fs -t ext4 /dev/sda7
mke2fs 1.41.12 (17-May-2010)
Could not stat /dev/sda7 --- No such fileor directory
The device apparently does not exist; didyou specify it correctly?
解決方法：執行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並且在不重新啟動機器的情況下系統能夠識別這些分區。
查看是否安裝過該命令：
[root@linuxidc~]# rpm -q parted
packageparted is not installed
提示沒有安裝過，則需要安裝parted
安裝命令：#yum install parted #前提是保證你的虛擬機可以上網，要從網絡下載安裝包
[root@linuxidc~]# yum install parted
Loadedplugins: fastestmirror
1234567 Loadingmirror speeds from cached hostfile
* base: mirrors.skyshe.cn
* extras: mirrors.skyshe.cn
* updates: mirrors.skyshe.cn
base | 3.7 kB 00:00
extras |3.3 kB 00:00
updates | 3.4 kB 00:00
Settingup Install Process
ResolvingDependencies
-->Running transaction check
--->Package parted.i686 0:2.1-25.el6 will be installed
-->Finished Dependency Resolution
DependenciesResolved
=============================================================================
Package Arch Version Repository Size
=============================================================================
Installing:
parted i686 2.1-25.el6 base 595 k
TransactionSummary
=============================================================================
Install 1 Package(s)
Totaldownload size: 595 k
Installedsize: 2.1 M
Isthis ok [y/N]: y
DownloadingPackages:
parted-2.1-25.el6.i686.rpm | 595 kB 00:16
Runningrpm_check_debug
RunningTransaction Test
TransactionTest Succeeded
RunningTransaction
Installing : parted-2.1-25.el6.i686 1/1
Verifying : parted-2.1-25.el6.i686 1/1
Installed:
parted.i686 0:2.1-25.el6
Complete!
安裝完成後，再進行查詢一次，已經安裝成功。
[root@linuxidc~]# rpm -q parted
parted-2.1-25.el6.i686
執行一下該命令：
[root@linuxidc~]# partprobe
Warning:WARNING: the kernel failed to re-read the partition table on /dev/sda (Deviceor resource busy). As a result, it maynot reflect all of your changes until after reboot.
Warning:WARNING: the kernel failed to re-read the partition table on /dev/sdb (Deviceor resource busy). As a result, it maynot reflect all of your changes until after reboot.
Warning:Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.
Warning:Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.
Error:Invalid partition table - recursive partition on /dev/sr0.
然後執行格式化，就OK了，如果還提示出錯，重啟之後再執行格式化就可以了。
[root@linuxidc~]# mkfs -t ext4 /dev/sda7
mke2fs1.41.12 (17-May-2010)
Filesystemlabel=
OStype: Linux
Blocksize=4096 (log=2)
Fragmentsize=4096 (log=2)
Stride=0blocks, Stripe width=0 blocks
64384inodes, 257032 blocks
12851blocks (5.00%) reserved for the super user
Firstdata block=0
Maximumfilesystem blocks=264241152
8block groups
32768blocks per group, 32768 fragments per group
8048inodes per group
Superblockbackups stored on blocks:
32768, 98304, 163840, 229376
Writinginode tables: done
Creatingjournal (4096 blocks): done
Writingsuperblocks and filesystem accounting information: done
Thisfilesystem will be automatically checked every 35 mounts or
180days, whichever comes first. Use tune2fs-c or -i to override.
