[PLUG] IDE RAID and Linux (revisions)
Launi
launi at zaramyth.net
Sat Mar 15 14:26:02 UTC 2003
I apologize as I have made a mistake in my original posting. I'm only using
*4* drives for Raid level 5 I'll update the text below.
***
I did a search on the archives (http://plug.skylab.org/cgi-bin/htsearch) and
found nothing for IDE RAID.
***
I'm going to build a replacement Linux server for one of my aging servers
and want to do RAID 5. I have done hardware SCSI RAID on Window$ so I know
how it works in principle. I have never done software IDE RAID before. I
have a few questions before I get started that may save me aggravation later
on. I understand that the Linux 2.4.x kernel supports software RAID and I
also know that in order to get the best performance you need your IDE drives
on one channel each. I want RAID 5 with one hot spare using 4 identical 72
GB drives.
I'm open to using any Linux distribution that will make this work. I have
used RedHat, Mandrake and Debian in the past.
1. Can I just have my 4 IDE drives connected to two separate two channel
PCI IDE controllers and Linux will recognize them during startup? 2. If I
do buy a 4 channel controller (Rocket Raid 404) which does not support RAID
5 via hardware, will Linux support it using software? 3. Should I only use
the controllers listed here
(http://www.tldp.org/HOWTO/Hardware-HOWTO/ideraid.html)?
4. If I'm not concerned about performance can I use one 2 channel PCI IDE
controller and connect the four drives (two on each channel)?
Basic RAID configuration questions
1. If I use Linux software RAID without a hardware driver should I boot off
a single disk and then make RAID for just my data? 2. If I have hardware
RAID with Linux driver support can I install directly on the RAID?
I'm on a budget and this is a home business system so that I can store my
clients graphic work. If I can use one PCI card with 4 ATA controllers on
it at a cost of $100 then this would be ideal. If I have to go with a
higher end SX6000 or Escalade 7500-4 ATA 133 RAID Controller Card then I
would have to spend about $300. I'll spend the money if that's what it
takes to work, but I wanted to use Linux software RAID and did not want to
have to deal with third party hardware drivers.
Lonnie Wormley
______________________________________________
First they ignore you. Then they laugh at you.
Then they fight you. Then you win.
~ Mohandas Gandhi
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