how to setup up raid in existing linux box

[marco]

how to setup up raid in existing linux box? I just know how to do it during install a new linux box.

[starfish]

Marco,

Start with this link fro software RAID. Hope it helps.

http://www.linuxhomenetworking.com/linux-adv/raid.htm

[lynOS]

You should run following command:

fdisk /dev/hda
.....
Disk /dev/hda: 40.0 GB, 40060403712 bytes
255 heads, 63 sectors/track, 4870 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 2180 17406427+ 83 Linux
/dev/hda3 2181 2320 1124550 82 Linux swap

Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Selected partition 4
First cylinder (2321-4870, default 2321):
Using default value 2321
Last cylinder or +size or +sizeM or +sizeK (2321-4870, default 4870): +200M (What you want !!!)
Command (m for help): p
Command (m for help): t
Partition number (1-4): 4
Hex code (type L to list codes): fd
Command (m for help): w

After that run reboot command to effect the harddisk ....

NOTE: If you have another disk like hdb apply this command on /dev/hdb

Have fun !!!

lynOS
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www.lynos.net