From owner-freebsd-questions  Wed Jun 28  7:49:31 2000
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Date: Wed, 28 Jun 2000 10:47:44 -0400
From: Nathan Vidican <webmaster@wmptl.com>
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To: Matt Harrington <matt@ucsd.EDU>
Cc: questions@freebsd.org
Subject: Re: best RAID config for system disk?
References: <20000627163520.B14393@dnai.com>
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Matt Harrington wrote:
> 
> I have a Mylex Acceleraid 250 controller and I'd like to use it to build
> some reliability into a mail/web/ftp server.  i'd like to put the system
> disk under some RAID configuration.  is the best setup RAID 0+1?  if so,
> how many drives does this require with this particular Mylex controller?
> i've heard mentioned that this controller can do 0+1 with 2 drives, but I
> don't see how that would work.  i'm under the assumtion that i need 3
> drives.  i suppose i'll put them into a hot-swappable rackmount enclosure,
> probably with an Abit KA7/Athlon setup i already have.
> 
> also, how do i know when a drive fails?  will something useful pop up in
> the syslog which tells me which drive to replace?
> 
> ---Matt
> 
> To Unsubscribe: send mail to majordomo@FreeBSD.org
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I'm currently using a Mylex AcceleRAID 250 PCI card as well. My
configuration is as follows:

Mylex AcceleRAID 250
 -(4)  Quantum Atlas IV SCSI2-UW-LVD 9.1Gig Disks
 -RAID 5, approx 27Gigs, using Parity with hot-swap

System:
 -SiliconRax 4U rackmount chassis ()
 -(4) SNT SCSI U2W-LVD Hot-Swap 5.25" Drive Carriages
 -Intel L440GX Dual PIII Server-Board
 -(2) Intel PIII 500mhz CPU's
 -Running FreeBSD 4.0-STABLE (as reccomended to me by someone previously
regarding  the use of this controller and FreeBSD).
 -(3) 256meg PC100 SDRAM

As far as syslog producing an error when a drive fails, I do not know.
However, I do know that when a drive fails, the carriages we purchased
have an indicator light and an audible alarm goes off. I'd reccomend
these carriages (made by SNT, distributed by www.startech.com), if
you're intent upon doing a hot-swappable setup.
   
-- 
Nathan Vidican
webmaster@wmptl.com
Windsor Match Plate & Tool Ltd.
http://www.wmptl.com/


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