Re: RAID 1 or 5 ?

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Article #442

#442

From: Thomas Tonino
Date: Sun, 01 Aug 1999 00:00

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highend wrote:

> >Three drive RAID 1 or mirrored RAID5 arrays.

> nice thought, BUT none of the manufacturers that i know of makes
> a RAID controller that does that

Sun/Online/Solstice Disksuite software allows a three way mirror.
Also, you may be able to use two hardware RAID5 devices in a
software mirrored configuration.

Finally: disks are pretty reliable these days. Take the chance of
controller, bus, cable, power failure into account as well, as
well as the chance of undetected data corruption on the cable.

In that regard software raid could do better if you forced double
read of the mirror sides and did a compare. No-one does I
believe.

Thomas

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From: Thomas Tonino <ttonino@bio.vu.nl>
Subject: Re: RAID 1 or 5 ?
Date: 1999/08/01
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