From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <ec7845c4765e5548c98e3cc9cebdc1ad@collyer.net>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Standalone Fileserver with IDE disk?
From: Geoff Collyer <geoff@collyer.net>
In-Reply-To: <86oexmv29j.fsf@gic.mteege.de>
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Date: Mon, 15 Sep 2003 02:37:21 -0700
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See /sys/src/fs/pc/devata.c; IDE == ATA == PATA.

It works; I have 4 IDE disks on my file server.  You need to declare
the controllers as apparently not described in plan9.ini(8) (to my
surprise):

	ata0=type=ata irq=14
	ata1=type=ata irq=15

The bad news is, as jmk noted, that the driver uses programmed I/O,
not DMA, so use of the IDE disks chews up the file server's CPU.  I
haven't had time to fix it and just making the cache disk into a SCSI
disk would largely solve the problem; doing the same for `other' would
almost entirely solve it.