[ale] Raid 5 on a Redhat 7.1 box - production worthy?

[Keith Hopkins]

Hi Gary,

   It depends.  :-)  Make sure the raid card you are using has mgmt 
tools for linux.  I'm was using an Adaptec AAA-133 on a Novell box, but 
dropped it in preference to an AMI 1300 card because there was online 
tools for the AMI card (and the AMI card was dirt cheap).  I had to boot 
to the BIOS tool, or DOS tools for the Adaptec card under linux (sic).

   Linux will see a single drive, just like Novell or NT when you use HW 
raid.  Linux also give you the option of software raid using the md 
(multiple device) driver, but what you save in HW costs, you pay for 
with lost performance.

   Most of the IDE RAID cards (3ware's being the only exception I know 
of) don't work properly under linux, because they are not true HW raid, 
but usually a HW/SW hybrid raid solution.

Lost in Taipei,
   Keith


Gary MacKay wrote:

> I'm setting up a new RedHat 7.1 box (HP e800) for a client to be used as
> a Sybase database server. My thought was to put a 9gig as the OS
> partition and three 18gig drives in Raid 5. I've used Raid 5 on Novell
> Netware and NT and in both cases, the controller card takes care of it
> and the OS just sees it as a single drive. Is that the case with linux
> also? Are there any downsides to using this config for a sql server?
> 
> HP e800
> dual 866mhz
> 1gig ram
> 
> 
> - Gary
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