CentOS 下添加新硬盘并分区格式化
Linux磁带备份，所以我先添加一块硬盘，并相应的建立分区，格式化，然后挂载使用。下面看我操作的步骤：
1、先用 Fdisk －l 来查看当前状态下磁盘情况
# fdisk -l
Disk /dev/hda: 5368 MB, 5368709120 bytes 255 heads, 63 sectors/track, 652 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/hda1 * 1 13 104391 83 Linux /dev/hda2 14 652 5132767 8e Linux LVM Disk /dev/hdb: 2147 MB, 2147483648 bytes 16 heads, 63 sectors/track, 4161 cylinders Units = cylinders of 1008 * 512 = 516096 bytes Disk /dev/hdb doesn't contain a valid partition table
从上面的信息可以知道，我添加了一块新硬盘/dev/hdb，大小为2G，未分区格式化状态。
2、用 Fdisk /dev/hdb 来进行分区操作
# fdisk /dev/hdb
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 4161. 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): n //输入N表示新建一个分区
Command action e extended p primary partition (1-4)
p //p 表示建立一个原始分区 Partition number (1-4): 1 //1 表示此分区编号为1. First cylinder (1-4161, default 1): 1 //1表示使用默认起始柱面号.如果要分多个区的话，先盘算好要多大，再输入数字 Last cylinder or size or sizeM or sizeK (1-4161, default 4161): // 输入: 回车 表示使用默认结束柱面号.即此分区使用整个硬盘空间 Command (m for help): w //保存分区
3、再次查看当前分区状态：
# fdisk -l
Disk /dev/hda: 5368 MB, 5368709120 bytes 255 heads, 63 sectors/track, 652 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/hda1 * 1 13 104391 83 Linux /dev/hda2 14 652 5132767 8e Linux LVM Disk /dev/hdb: 2147 MB, 2147483648 bytes 16 heads, 63 sectors/track, 4161 cylinders Units = cylinders of 1008 * 512 = 516096 bytes Device Boot Start End Blocks Id System /dev/hdb1 1 4161 2097112 83 Linux
可以看出，已经出来了一个/dev/hdb1的新分区。下一步将其格式化，再使用
4、用 mkfs.ext3 格式化新分区
# mkfs.ext3 /dev/hdb1
mke2fs 1.39 (29-May-2006) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) 262144 inodes, 524278 blocks 26213 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=536870912 16 block groups 32768 blocks per group, 32768 fragments per group 16384 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912 Writing inode tables: done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 32 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override.
5、挂载使用。
# mkdir /mnt/hdb1 //新建一个挂载点。 # mount /dev/hdb1 /mnt/hdb1 //挂载。 # df -h //查看分区
文件系统 容量 已用 可用 已用% 挂载点 /dev/mapper/VolGroup00-LogVol00 4.3G 3.6G 487M 89% / /dev/hda1 99M 12M 82M 13% /boot tmpfs 125M 0 125M 0% /dev/shm /dev/hdb1 2.0G 3.0M 1.9G 1% /mnt/hdb1
6、开机自动挂载
在 vi /etc/fstab 中添加新硬盘的挂载信息.添加下面一行:
/dev/hdb1 /mnt/hdb1 ext3 defaults 1 2（如果还有一个分区就是1 3，以此类推)
这样,每次开机后,系统会自动将/dev/hdb1挂载到/mnt/hdb1