分类：
2008-06-30 18:46:39
DELL 1850 服务器配置：
至强3.0GHZ *2
4G ECC DDR内存
73G SCSI Utrl 320 15K 硬盘 *2
目标
1． 根据实际需要发现系统的日志空间不够大
2． 由于新加了内存等等，系统的swap分区需要加大
实际操作：
1. 关机安装好硬盘
确保在开机BIOS时能看到该设备
进系统。
[root@localhost ~]# ls /dev|grep sdb -（这里假设原设备只有一块SCSI硬盘，现在添加一块）
sdb
现在开始给新磁盘分区：
[root@localhost dev]# fdisk sdb
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 8924.
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
(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): p （该处命令可以看出，新硬盘没有liunx分区）
Disk sdb: 73.4 GB, 73407820800 bytes
255 heads, 63 sectors/track, 8924 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
--------------------------------------------------------------------------------
Command (m for help): n (创建新分区)
Command action
e extended
p primary partition (1-4)
p （创建主分区）
Partition number (1-4): 1 （主分区号为1）
First cylinder (1-8924, default 1): 1 （设置分区大小，从第一扇区开始，默认）
Last cylinder or +size or +sizeM or +sizeK (1-8924, default 8924): +
Command (m for help): n (创建新分区)
Command action
e extended
p primary partition (1-4)
p （创建主分区）
Partition number (1-4): 2 （主分区号为2）
First cylinder (2434-8924, default 2434): （设置分区大小，默认）
Using default value 2434
Last cylinder or +size or +sizeM or +sizeK (2434-8924, default 8924): +
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@localhost dev]# fdisk sdb
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 8924.
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
(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): p （该处命令可以看出，新硬盘分好了两个区）
Disk sdb: 73.4 GB, 73407820800 bytes
255 heads, 63 sectors/track, 8924 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 2433 19543041 83 Linux
/dev/sdb2 2434 2556 987997+ 83 Linux
（+表示分区实际大小大于
将sdb1分区创建成liunx分区
[root@localhost dev]# mkfs.ext3 /dev/sdb1
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
2443200 inodes, 4885760 blocks
244288 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=0
150 block groups
32768 blocks per group, 32768 fragments per group
16288 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 30 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
[root@localhost dev]#
将/var/log目录下的日志文件等等，备份。
由于新的文件系统挂载到现有的目录下，会覆盖掉原目录下原有的文件。
将sdb1挂载到/var/log目录。
[root@localhost dev]#mount /dev/sdb1 /var/log
恢复日志文件到/var/log目录
将sdb2创建为swap分区
[root@localhost log]# mkswap -c /dev/sdb2
Setting up swapspace version 1, size = 1011703 kB
将新的swap分区挂载使用
[root@localhost log]# swapon /dev/sdb2
OK了
可以参看新的awap是否起用了：
[root@localhost log]# cat /proc/swaps
Filename Type Size Used Priority
/dev/sda6 partition 2096440 0 -1
/dev/sdb2 partition 987988 0 -2
修改/etc/fstab 以使新分区开机自动加载
LABEL=/ / ext3 defaults 1 1
devpts /dev/pts devpts gid=5,mode=620 0 0
tmpfs /dev/shm tmpfs defaults 0 0
LABEL=/home /home ext3 defaults 1 2
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
LABEL=/tmp /tmp ext3 defaults 1 2
LABEL=/usr /usr ext3 defaults 1 2
LABEL=/var /var ext3 defaults 1 2
/dev/sdb1 /var/log ext3 defaults 1 2
LABEL=SWAP-sda6 swap swap defaults 0 0
/dev/sdb2 swap swap defaults 0 0
