linux 挂载磁盘 mount解析

linux 挂载磁盘 mount解析。挂在磁盘操作(还有一个300G的盘没显示出来)：

[root@iZgo67bo9s3uaijzqrgbaxZ ori]#df -h

Filesystem Size Used Avail Use% Mounted on

/dev/hda1 39G 12G 26G 32% /

tmpfs 4.0G 0 4.0G 0% /dev/shm

[root@iZgo67bo9s3uaijzqrgbaxZ backup]#fdisk -l //查找未挂载的磁盘信息

Disk /dev/hda: 42.9 GB, 42949672960 bytes

224 heads, 56 sectors/track, 6687 cylinders

Units = cylinders of 12544 * 512 = 6422528 bytes

Device Boot Start End Blocks Id System

/dev/hda1 * 1 6688 41940992 83 Linux

Partition 1 does not end on cylinder boundary.

Disk /dev/xvdb: 322.1 GB, 322122547200 bytes

224 heads, 56 sectors/track, 50155 cylinders

Units = cylinders of 12544 * 512 = 6422528 bytes

Disk /dev/xvdb doesn't contain a valid partition table

[root@iZgo67bo9s3uaijzqrgbaxZ opt]#mkfs -t ext3 /dev/xvdb //格式化未挂载的磁盘，使用ext3格式

mke2fs 1.39 (29-May-2006)

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

39321600 inodes, 78643200 blocks

3932160 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=4294967296

2400 block groups

32768 blocks per group, 32768 fragments per group

16384 inodes per group

Superblock backups stored on blocks:

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

4096000, 7962624, 11239424, 20480000, 23887872, 71663616

Writing inode tables: done

Creating journal (32768 blocks): done

Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 31 mounts or

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

[root@iZgo67bo9s3uaijzqrgbaxZ opt]#mkdir /mnt/sdb //创建挂载对应的目录

[root@iZgo67bo9s3uaijzqrgbaxZ sdb]#mount /dev/xvdb /mnt/sdb //将磁盘挂载到创建的目录上

[root@iZgo67bo9s3uaijzqrgbaxZ sdb]#df -h

Filesystem Size Used Avail Use% Mounted on

/dev/hda1 39G 12G 26G 32% /

tmpfs 4.0G 0 4.0G 0% /dev/shm

/dev/xvdb 296G 191M 281G 1% /mnt/sdb