Re: 2.6.16-rc1-mm2 pata driver confusion

From: "Randy.Dunlap" <rdunlap@xenotime.net>
To: "Randy.Dunlap" <rdunlap@xenotime.net>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
	Ed Sweetman <safemode@comcast.net>,
	linux-kernel@vger.kernel.org, akpm@osdl.org
Subject: Re: 2.6.16-rc1-mm2 pata driver confusion
Date: Tue, 24 Jan 2006 09:08:04 -0800 (PST)	[thread overview]
Message-ID: <Pine.LNX.4.58.0601240907200.26036@shark.he.net> (raw)
In-Reply-To: <Pine.LNX.4.58.0601240904110.26036@shark.he.net>

On Tue, 24 Jan 2006, Randy.Dunlap wrote:

> On Tue, 24 Jan 2006, Alan Cox wrote:
>
> > On Maw, 2006-01-24 at 01:43 -0500, Ed Sweetman wrote:
> > > problem.  The problem is that there appears to be two nvidia/amd ata
> > > drivers and I'm unsure which I should try using, if i compile both in,
> > > which get loaded first (i assume scsi is second to ide) and if i want my
> > > pata disks loaded under the new libata drivers, will my cdrom work under
> > > them too, or do i still need some sort of regular ide drivers loaded
> > > just for cdrom (to use native ata mode for recording access).
> >
> > The goal of the drivers/scsi/pata_* drivers is to replace drivers/ide in
> > its entirity with code using the newer and cleaner libata logic. There
> > is still much to do but my SIL680, SiS, Intel MPIIX, AMD and VIA boxes
> > are using libata and the additional patch patches still queued.
>
> What is "MPIIX" anyway?
>
> and while I'm looking at the config menu, why do both
> Compaq Triflex and Intel PATA MPIIX say (Raving Lunatic)?

Lots of them say Raving Lunatic.  Are all of these Alan's libata
patches?

> > > 1.  Atapi is most definitely not supported by libata, right now.
> >
> > It works in the -mm tree.
> >
> > > 4.  moving to pata libata drivers _will_ change the enumeration of your
> > > sata devices, it seems that pata is initialized first, so when setting
> > > up your fstab entries and grub, you'll have to take into account how
> > > many pata devices you have and offset your current sata device names by
> > > that amount.
> >
> > Or use labels. As you move into the world of hot pluggable hardware it
> > becomes more and more impractical to guarantee drive ordering by name.
> >
> > You can mix and match the drivers providing you don't try and load both
> > libata and old ide drives for the same chip. Even then it should fail
> > correctly with one of them reporting resources unavailable.
> >
> > In fact I do this all the time when debugging so I've got a stable disk
> > for debug work and a devel disk.
>
>

-- 
~Randy