Eric Hattemer wrote:
You cant add RAID to the hdd you have the OS installed. I have 1,5. Good
to
You actually can add raid to the hard drive where you have the OS installed
in most modern distros. Its a bit tricky in the old ones. The old ones
require that you install to a different hard drive, then set up a software
raid table, then move the system to the raid array, then edit the fstab,
then reboot. This is a lot of work. In systems after about RH 7.1, the
graphical install allows you to put / on a software raid array. Usually
what you'll want to do, however, is make one partition on the first drive be
the /boot partition (non-raid) just to make kernel configuration easier.
Then put / on the raid array. You can get some of the performance bonuses
from raid 0/5 by putting /usr, /home, /bin, /opt and whatever on separate
drives if you have a big enough system.
-Eric Hattemer
Depends on the RAID level. If you are starting from single drive, and
you want to go to a RAID level that is redundant (1, 4, or 5...anything
but 0), what you can do is configure the array with the drive currently
in use as a "failed disk", meaning that when it initilizes the array, it
will bring it up in degraded mode, not using the disk that you're
currently on. You then copy everything over, reboot onto the new array
(still in degraded mode) and raidhotadd in the last disk.
This is how I converted my slack system to RAID 5.
--MonMotha
