linux 磁盘分区

标签：linux 分区

创建一个扩展分区：
[root@qing init.d]# fdisk /dev/sdb

WARNING: DOS-compatible mode is deprecated. It‘s strongly recommended to
 

       switch off the mode (command ‘c‘) and change display units to
        sectors (command ‘u‘).

Command (m for help):
Command (m for help): p

Disk /dev/sdb: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x3c8b5df6

  Device Boot     Start        End     Blocks  Id System

Command (m for help): n
Command action
  e  extended
  p  primary partition (1-4)
e
Partition number (1-4): 1
First cylinder (1-652, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-652, default 652):
Using default value 652

Command (m for help): p

Disk /dev/sdb: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x3c8b5df6

  Device Boot     Start        End     Blocks  Id System
/dev/sdb1              1        652    5237158+  5 Extended

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@qing init.d]#

格式化：
问题，扩展分区不能格式化，需要创建逻辑分区后格式化
[root@qing init.d]# mkfs -t ext3 /dev/sdb1
mke2fs 1.41.12 (17-May-2010)
mkfs.ext3: inode_size (128) * inodes_count (0) too big for a
       filesystem with 0 blocks, specify higher inode_ratio (-i)
       or lower inode count (-N).

[root@qing init.d]#

创建逻辑分区：
1、查看分区信息
[root@qing init.d]# fdisk -l

Disk /dev/sda: 26.8 GB, 26843545600 bytes
255 heads, 63 sectors/track, 3263 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00062b86

  Device Boot     Start        End     Blocks  Id System
/dev/sda1  *          1         64     512000  83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2             64       3264   25701376  8e Linux LVM

Disk /dev/sdb: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x3c8b5df6

  Device Boot     Start        End     Blocks  Id System
/dev/sdb1              1        652    5237158+  5 Extended

Disk /dev/mapper/vg_qing-lv_root: 24.2 GB, 24234688512 bytes
255 heads, 63 sectors/track, 2946 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/vg_qing-lv_root doesn‘t contain a valid partition table

Disk /dev/mapper/vg_qing-lv_swap: 2080 MB, 2080374784 bytes
255 heads, 63 sectors/track, 252 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/vg_qing-lv_swap doesn‘t contain a valid partition table
2、开始创建逻辑分区
[root@qing init.d]# fdisk /dev/sdb

WARNING: DOS-compatible mode is deprecated. It‘s strongly recommended to
        switch off the mode (command ‘c‘) and change display units to
        sectors (command ‘u‘).

Command (m for help):
Command (m for help): n
Command action
  l  logical (5 or over)
  p  primary partition (1-4)
l
First cylinder (1-652, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-652, default 652):
Using default value 652

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
[root@qing init.d]#
3、查看创建的逻辑分区
[root@qing init.d]# fdisk -l              

Disk /dev/sda: 26.8 GB, 26843545600 bytes
255 heads, 63 sectors/track, 3263 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00062b86

  Device Boot     Start        End     Blocks  Id System
/dev/sda1  *          1         64     512000  83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2             64       3264   25701376  8e Linux LVM

Disk /dev/sdb: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x3c8b5df6

  Device Boot     Start        End     Blocks  Id System
/dev/sdb1              1        652    5237158+  5 Extended
/dev/sdb5              1        652    5237127  83 Linux

Disk /dev/mapper/vg_qing-lv_root: 24.2 GB, 24234688512 bytes
255 heads, 63 sectors/track, 2946 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/vg_qing-lv_root doesn‘t contain a valid partition table

Disk /dev/mapper/vg_qing-lv_swap: 2080 MB, 2080374784 bytes
255 heads, 63 sectors/track, 252 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/vg_qing-lv_swap doesn‘t contain a valid partition table
4、格式化分区
[root@qing init.d]# mkfs -t ext3 /dev/sdb5
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
327680 inodes, 1309281 blocks
65464 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=1342177280
40 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
       32768, 98304, 163840, 229376, 294912, 819200, 884736

Writing inode tables: done                           
Creati

本文出自 “小白的小窝” 博客，请务必保留此出处http://qing429.blog.51cto.com/5781009/1589353

linux 磁盘分区

标签：linux 分区

原文地址：http://qing429.blog.51cto.com/5781009/1589353