快速业务通道

linux vm 添加硬盘

作者 佚名技术 来源 Linux系统 浏览 发布时间 2012-04-24

  将虚拟机关闭,加载一块硬盘

  fdisk -l 发现新加载的硬盘标号是sdc ,也就是第三块硬盘

  fdisk /dev/sdc

  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.

  The number of cylinders for this disk is set to 2349.

  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)

  Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

  Command (m for help): m

  Command 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): n

  Command action

  e extended

  p primary partition (1-4)

  e

  Partition number (1-4): 1

  First cylinder (1-2349, default 1):

  Using default value 1

  Last cylinder or size or sizeM or sizeK (1-2349, default 2349):

  Using default value 2349

  Command (m for help): w

  The partition table has been altered!

  Calling ioctl() to re-read partition table.

  Syncing disks.

  [root@qa ~]# mkfs -t ext3 -c /dev/sdc1

  mke2fs 1.39 (29-May-2006)

  /dev/sdc1: Invalid argument passed to ext2 library while setting up superblock

  这是应为,在创建分区时添加的是扩展分区,扩展分区不能直接format,需要对扩展分区再划分出逻辑分区

  主分区,扩展分区,逻辑分区三者有什么不同?什么关系?各用在何处

  1. 每个硬盘有一个主分区表, 其中每项表示一个主分区, 定义了硬盘上的一段连续空间,

  主分区可以是各种类型的, 如fat, linux ext2, fat32, ntfs等等

  2. 主分区表有一个限制, 最多只能有四个. 于是就有了扩展分区:

  这是一个特殊的主分区, 它不能直接使用, 而是象一个指针, 指向一个扩展分区表.

  每个硬盘只能有一个扩展分区.

  3. 在扩展分区表中定义的分区就叫逻辑分区, 它的功能, 作用和主分区类似,

  但被限制在扩展分区所定义的空间大小范围内.

  [root@qa ~]# fdisk /dev/sdc

  The number of cylinders for this disk is set to 2349.

  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.

凌众科技专业提供服务器租用、服务器托管、企业邮局、虚拟主机等服务,公司网站:http://www.lingzhong.cn 为了给广大客户了解更多的技术信息,本技术文章收集来源于网络,凌众科技尊重文章作者的版权,如果有涉及你的版权有必要删除你的文章,请和我们联系。以上信息与文章正文是不可分割的一部分,如果您要转载本文章,请保留以上信息,谢谢!

分享到: 更多

Copyright ©1999-2011 厦门凌众科技有限公司 厦门优通互联科技开发有限公司 All rights reserved

地址(ADD):厦门软件园二期望海路63号701E(东南融通旁) 邮编(ZIP):361008

电话:0592-5908028 传真:0592-5908039 咨询信箱:web@lingzhong.cn 咨询OICQ:173723134

《中华人民共和国增值电信业务经营许可证》闽B2-20100024  ICP备案:闽ICP备05037997号