Re: RAID Questions

From: Henny Bekker <>
Date: Mon, 6 Apr 1998 03:10:08 +0200 (METDST)

Hi Dean,

> We have been thinking about adding a RAID system to our FreeBSD/Squid
> setup. Has anyone else added a RAID array to FreeBSD (2.2.6)? If so
> what type of RAID are people using and what brands are supported under
> FreeBSD?
> Also does anyone know if a DLT is supported?
I don't known of any RAID system for freeBSD while I'm using Squid on some
IBM AIX systems.. We have achieved spectacular benefits when we switched
from a JBOD (Just a Bunch Of Disks) to a striping disk-set. The average
latency was reduced from 1 second to 0.2 seconds!! In the old situation
(a non-striped journal file system) all disk activity was on one disk which
was working at 100% and was causing for lots of waiting I/O CPU cycles..
With diskstriping (RAID-0) all disks activity is equally divided among all
disks.. [We are using a software disk-striping solution. I imagine a RAID-5
crontroller (RAID-0 is even faster but does not have redundantcy) with
write-through RAM of e.g. 8-MByte (or more) whould make the system even
more faster!!]

Cheers, Henny

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Received on Sun Apr 05 1998 - 18:13:46 MDT

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