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queryanalyzer

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RAID Controller...

Hi all...
    I have a problem with RIAD controller. I'm trying to install RH 8.0 in a machine with 3 30Gb hdd. Linux is not recognising the hard drives..  its saying 'no hard drives found'. But when i disable the RAID card it recognises the SCSI based drives.
Is it a limitation or am i missing something here ??
Should i try RH 9.0

Thanks.
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Have you gone into the RAID controller bios and created a logical drive for the operating system to use?
If so, what is the brand and model# of your controller?
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queryanalyzer

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Hi..  
    i havent tried to go into the RAID bios. I will try that now.
Btw, my RAID controller is IBM ServeRAID -4 Ultra 160 SCSI Contoller.

Thanks.
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Hi...
  Think i will go with RAID 0. I want 60GB space for MySQL database.
Also i just noticed that Linux offers a software RAID option.
Which is better, the H/W based one or the S/W based.
Just going by the cost, I'm gonna have to think its the H/W based.

Thanks.
The HW raid offloads the raid processing to the CPU on the card, which with it's software is optimized for that task.
Note though that in the event of a controller failure, you'll have to have a strategy to get a replacement.
Note also your MTBF on that striped set is tripled as the failure of any disk toasts all your volumes, so have a backup and disaster recovery strategy in mind.
You need a driver for the RAID card so RedHat can see the RAID array
RH 8's hwprobe ought to pick up any mainstream raid controller and load the appropriate modules.