From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Lennart Sorensen <lsorense@csclub.uwaterloo.ca>
Cc: Christian H?rtwig <christian.haertwig@gmx.de>,
linux-kernel@vger.kernel.org
Subject: Re: How does RAID work with IT8212 RAID PCI card?
Date: Tue, 13 Jun 2006 23:47:27 +0100 [thread overview]
Message-ID: <1150238847.2232.1.camel@localhost.localdomain> (raw)
In-Reply-To: <20060613160138.GC560@csclub.uwaterloo.ca>
Ar Maw, 2006-06-13 am 12:01 -0400, ysgrifennodd Lennart Sorensen:
> Congratulations. You have a fake raid card by the sound of it. A
> hardware raid card would have only shown one drive, while a fake raid
> card expects the driver to work with the bios to find out the setup (and
> handle booting), and then the driver does all the raid work in software.
The IT8212 is not a fake raid card - it depends on the firmware whether
you see a drive per raid volume (hardware raid mode) or not (ATAPI
capable firmware). We've found the raid firmware seems quite
temperamental and there is little performance gain from raid 1 in
hardware over software so using md or device mapper is recommended for
that reason.
prev parent reply other threads:[~2006-06-13 22:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-13 15:58 Christian Härtwig
2006-06-13 16:01 ` Lennart Sorensen
2006-06-13 16:20 ` Matheus Izvekov
2006-06-13 16:44 ` Lennart Sorensen
2006-06-13 16:56 ` Matheus Izvekov
2006-06-13 22:47 ` Alan Cox [this message]
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