Re: software raid0/striping on C: ?
From: Gary Chanson (gchanson_at_No.Spam.TheWorld.net)
Date: 05/02/04
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Date: Sun, 2 May 2004 14:02:22 -0400
"andrea catto'" <acatto@dataflight.com> wrote in message
news:OcYUOzGMEHA.3016@tk2msftngp13.phx.gbl...
> My topic here is to discuss why microsoft does not implement the ability
to
> utilize at OS-Setup two disks as raid0/striping.
>
> Yes I know, raid0 is not safe, or at least is just as safe a a 1-disk
which
> is the most popular solution for 99% of the users in the desktop
computing.
>
> So why after all not allowing this ???
>
> I think users should be allowed doing this, assuming the risks on their
own.
>
> the fact of the matter is that nowadays everybody may afford a couple of
> hard drives and if put on different IDE channels/perhaps controllers they
> could 'fly' with raid0.
>
> This limitation indeed exixts within the Redhat/Fedora implementations too
> as well as others, but just because of 'lack of care' for those
requirements
> that many users would appreciate instead if given the chance.
>
> Slackware Linux on the other hand SHOWS that it is possible to in fact
have
> two separate devices paired as raid0 mounted on / (equivalent to c:)
>
> This raid0/striping on boot/root is way possible, I am a linux guru too,
> although I love and prefer Microsoft, and since it's possible because I
made
> it and used it, I am wondering if this limitation is made perhaps because
> the microsoft's disk structure/software could not handle this at all
unlike
> linux.
It's not possible to boot from a RAID array because the BIOS can't read
the boot sector and load the boot loader from it. It might be possible to
use a normal partition to boot and a RAID partition to hold the actual
operating system files but that would require that the boot loader support
reading from a RAID array.
A RAID 0 array is less reliable then a single drive because the failure
rates add together. A two drive array will be approximately 70% as reliable
as each of the single drives it's built from.
-- -GJC [MS Windows SDK MVP] -Software Consultant (Embedded systems and Real Time Controls) - http://www.mvps.org/ArcaneIncantations/consulting.htm -gchanson@mvps.org
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