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Article #743

hardware mirror of IDA HD's ??

#743
From: Carl Brewer
Date: Thu, 27 Oct 1994 05:44
37 lines
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G'day,

for various reasons,  we're looking at getting a PC and running a UNIX
variant on it, and running a mirror'd disk system on it (it's a real time
financial database app running off an NFS server on the PC).

The sort of device I'm looking for would look, to the O/S, like one
drive, but in fact be two, a write to one is a write to both.

Probably the sort of thing that you could almost do with a set of wire
cutters and a soldering iron (make a splitter cable!), but I'm after 
something that'll be reliable, and have some way (ring a bell, flash a 
light?) of informing operators that one of the disks has died, and the 
other is in use exclusivly.  Of course, there would be a need to hot-swap
drives as well!  

RAID springs to mind, but that's a bit expensive for a small database
(we're looking at about 250-350 MB all up) and I'd rather be able to
do it in hardware than have to rely on ports to various different UNIX
flavours (we're looking at NetBSD 0.9 and Slowaris 2.4).

Does anyone know of any such product?  I've heard of a Tekram 600CF IDE
controller, anyone heard of it?  Know anything that would do what I'm
looking for?

If you do, email would be great, and I'll post a summary if there's 
interest from anyone else, I will monitor these groups for a while 
too, so feel free to followup if you'd rather.

thanks


-- 
Carl Brewer				Ph :61-9-380-1893 | #include \
Systems/Network Officer, Reid Library   Fax:61-9-380-1012 | <std_disclaimer.h>
University of Western Australia		carl@oversteer.library.uwa.edu.au
Woooo, speed hump cat ....		beable
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From: carl@oversteer.library.uwa.edu.au (Carl Brewer)
Newsgroups: comp.sys.ibm.pc.hardware.storage,comp.sys.ibm.pc.hardware.misc,aus.computers.ibm-pc
Subject: hardware mirror of IDA HD's ??
Date: 27 Oct 1994 13:44:45 +0800
Organization: UWA Library
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Summary: hardware IDE disk mirror?
Beer: Victoria Bitter
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