Linux磁盘分区（二）：删除

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原创作品，出自 “深蓝的blog” 博客，欢迎转载，转载时请务必注明出处（http://blog.csdn.net/huangyanlong）。

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续接上篇：“举例：将sdb1格式化为ext3文件系统”点击打开链接

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[root@hyl /]# df -hFilesystem            Size  Used Avail Use% Mounted on/dev/sda1             9.7G  5.4G  3.9G  59% //dev/sda3              35G   17G   17G  50% /hometmpfs                1006M     0 1006M   0% /dev/shm/dev/sdb1             1.9G   35M  1.8G   2% /data1[root@hyl /]# umount /data1[root@hyl /]# df -hFilesystem            Size  Used Avail Use% Mounted on/dev/sda1             9.7G  5.4G  3.9G  59% //dev/sda3              35G   17G   17G  50% /hometmpfs                1006M     0 1006M   0% /dev/shm[root@hyl /]# fdisk -lDisk /dev/sda: 53.6 GB, 53687091200 bytes255 heads, 63 sectors/track, 6527 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes   Device Boot      Start         End      Blocks   Id  System/dev/sda1   *           1        1305    10482381   83  Linux/dev/sda2            1306        1827     4192965   82  Linux swap / Solaris/dev/sda3            1828        6527    37752750   83  LinuxDisk /dev/sdb: 10.7 GB, 10737418240 bytes255 heads, 63 sectors/track, 1305 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes   Device Boot      Start         End      Blocks   Id  System/dev/sdb1               1         250     2008093+  83  Linux/dev/sdb2             251         500     2008125   83  Linux/dev/sdb3             501         750     2008125   83  Linux/dev/sdb4             751        1305     4458037+   5  Extended/dev/sdb5             751         875     1004031   83  Linux/dev/sdb6             876        1000     1004031   83  Linux/dev/sdb7            1001        1305     2449881   83  Linux

[root@hyl /]# fdisk /dev/sdbThe number of cylinders for this disk is set to 1305.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): mCommand action   a   toggle a bootable flag   b   edit bsd disklabel   c   toggle the dos compatibility flag   d   delete a partition   l   list known partition types   m   print this menu   n   add a new partition   o   create a new empty DOS partition table   p   print the partition table   q   quit without saving changes   s   create a new empty Sun disklabel   t   change a partition's system id   u   change display/entry units   v   verify the partition table   w   write table to disk and exit   x   extra functionality (experts only)Command (m for help): pDisk /dev/sdb: 10.7 GB, 10737418240 bytes255 heads, 63 sectors/track, 1305 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes   Device Boot      Start         End      Blocks   Id  System/dev/sdb1               1         250     2008093+  83  Linux/dev/sdb2             251         500     2008125   83  Linux/dev/sdb3             501         750     2008125   83  Linux/dev/sdb4             751        1305     4458037+   5  Extended/dev/sdb5             751         875     1004031   83  Linux/dev/sdb6             876        1000     1004031   83  Linux/dev/sdb7            1001        1305     2449881   83  Linux</span>

Command (m for help): d--输入删除指令Partition number (1-7): 1--输入删除的分区号Command (m for help): p--打印分区表Disk /dev/sdb: 10.7 GB, 10737418240 bytes255 heads, 63 sectors/track, 1305 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes   Device Boot      Start         End      Blocks   Id  System/dev/sdb2             251         500     2008125   83  Linux/dev/sdb3             501         750     2008125   83  Linux/dev/sdb4             751        1305     4458037+   5  Extended/dev/sdb5             751         875     1004031   83  Linux/dev/sdb6             876        1000     1004031   83  Linux/dev/sdb7            1001        1305     2449881   83  Linux--可以看到sdb1已经被删除了--接下来同理，删除其它分区Command (m for help): dPartition number (1-7): 2Command (m for help): dPartition number (1-7): 3Command (m for help): dPartition number (1-7): 4Command (m for help): p Disk /dev/sdb: 10.7 GB, 10737418240 bytes255 heads, 63 sectors/track, 1305 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes   Device Boot      Start         End      Blocks   Id  SystemCommand (m for help): w--保存退出The partition table has been altered!Calling ioctl() to re-read partition table.Syncing disks.--现在可以移除磁盘了

***********************************************声明************************************************

原创作品，出自 “深蓝的blog” 博客，欢迎转载，转载时请务必注明出处（http://blog.csdn.net/huangyanlong）。

表述有错误之处，请您留言或邮件（hyldba@163.com）指明，不胜感激。

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