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Date:      Wed, 05 Jan 2000 14:46:45 -0600
From:      Steve Kaczkowski <steve@inc.net>
Cc:        FreeBSD ISP <freebsd-isp@FreeBSD.ORG>
Subject:   Re: News Server reccomendations (one more thing)
Message-ID:  <3873ADB5.F195C474@inc.net>
References:  <Pine.LNX.4.10.10001051448500.3562-100000@thud.tbe.net>

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"Gary D. Margiotta" wrote:
> 
> In our experiences with news, you really don't want to RAID the spool
> array... it's the same idea as in a heavily loaded mail server... the
> smaller the disk, the more disks you have, the more spindles, the better
> off you are.  I would personally love to have 100 2GB Barracudas in a
> rack, but that leads to one heckuva lot of real estate.
> 
> IMHO, keep your spools away from RAID... with the introduction of U2W and
> 10,000 RPM drives, you can put 2 silos filled with 9 GB U2W drives, and
> still have it be insanely fast and large.  You don't want to go above 9GB
> in one shot, otherwise when a drive goes, you'll lose a heckuva lot of
> information.  Also beware of striping, as if one disk goes, you lose one
> large chunk of spool.  And drives will go... just due to the stress of
> being up and running 24/7/365, usually at heavy useage.
> 
> On Wed, 5 Jan 2000, Gary D. Margiotta wrote:


Which is why they invented Hardware RAID, specifically a Mylex DAC960SX
External
SCSI to SCSI RAID controller. Using a controller like this has numerous
benefits they include:

1) All RAID functions are offloaded onto Mylex controller so very little
if any performance hit is noticed

2) OS independence, no drivers needed

3) Hot spares, if a disk dies in the array the hot spare will take it's
place and if you're
using RAID 5 you can just toss in a new disk.


And many other cool/useful features..

We swear by em, I've got 18 of them sitting over in the corner waiting
to be put into a box..


-- 
Steve Kaczkowski	Time Warner Telecom IDD
steve@inc.net          	(414)908-9012
http://www.inc.net     	(603)737-9209 Fax


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