I want to set up a raid (mirror).
from what ive read, i want raid 1
(no hardware card, and NOT scsi)
i have a primary hd, ide (and, ide on the motherboard, of course).
i have gotten an additional disk, exactly like the primary....
redhat 8.0

i have had this machine up, for a few years, and have a tremendous amount
of work, including mysql, dns, email, and web....
i ALMOST remember how to do some of the stuff, and i do backup,
but, i feel i should now mirror my drive.
The Second disk IS now installed....
(seems like its /dev/hdc, as opposed to /dev/hda (primary)
(i guess my cd , is /dev/hdb)

what next ????

i saw an article:,
http://jamesthornton.com/redhat/linu...ware-raid.html

that talks about "disk druid"....

just What is that, and where is it ??
(i can work on the gui, or the command line)

i Also have this fear, that typing mkraid will "deatroy" my primary disk


thanks for any help

I haven't tried to build a mirror from an existing disk, I start from scratch because that way you can have
the persistent-superblock at eacht partition that contains the configuration in case you have to recover.

I'd suggest a /etc/raidtab like this to start from (correct the hdb2 and hdc2 to you situation)
raiddev /dev/md0
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
persistent-superblock 1
chunk-size 4
device /dev/hdb2
raid-disk 0
device /dev/hdc2
raid-disk 1


for a start you can make two partitions about the same size on your new disk.
that way you can experiment without a big risk. But this won't give you any security
for the data. make the partition type for those partitions 'raid autodetect' I don't
know the id by hard but fdisk or cfdisk can tell you.

after the mkraid /dev/md0 you can raidstart /dev/md0 and format /dev/md0 like
any other partition.

regards

Tlowk