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Article #4658

Re: Problem with DeviceIoControl() IOCTL_STORAGE_QUERY_PROPERTY

#4658
From: Andrue Cope [TeamB]
Date: Fri, 16 Dec 2005 10:35
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2135 bytes
Alan Bellingham wrote:

> Given that I have 4 SATA drives attached to RAID card, if I were to
> encounter a Motherboard also able to give me 0+1, could I leave out
> the card? Or is there no standardisation as to how drives are laid
> out and recognised in RAID arrays?

There isn't any standardisation. One of the reason we dislike RAIDs is
that there's nearly always some faffing around trying to work it out.
Unfortunately there are around a dozen variables that can be tweaked
and very few arrays even bother to store their configuation information
on the disks. The only ones that might do are the ones where you can
adjust the settings which is generally the more expensive ones.

Another possible issue with SATA that I'm not too keen on is that the
RAIDing might not be done in hardware. It could be the driver that
performs the RAIDing and pretends to its client that it's a single
device. That's a cheap solution that wastes CPU time and probably set
you up for problems in the future.

-- 
Andrue Cope [TeamB]
[Bicester, Uk]
http://info.borland.com/newsgroups/guide.html
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From: "Andrue Cope [TeamB]" <no.spam@not.a.valid.address>
Subject: Re: Problem with DeviceIoControl() IOCTL_STORAGE_QUERY_PROPERTY
Newsgroups: borland.public.cppbuilder.nativeapi
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