From owner-freebsd-current  Sun Mar 28 14:58: 2 1999
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Date: Sun, 28 Mar 1999 17:55:55 -0500 (EST)
From: Brian Feldman <green@unixhelp.org>
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To: Soren Schmidt <sos@freebsd.dk>
Cc: current@FreeBSD.ORG
Subject: Re: UPDATE4: ATA/ATAPI driver new version available.
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   I tried this out just as soon as I saw the announcement! Your driver is
really coming along well. I have three basic problems with it:

	1. A hard reset is necessary to get the CD-ROM drive to work with acd.

wdc0: unit 1 (atapi): <NEC                 CD-ROM DRIVE:285/3.04>, removable, dma, iordy
wcd0: drive speed 2067KB/sec, 128KB cache
wcd0: supported read types: CD-R, CD-DA
wcd0: Audio: play, 16 volume levels
wcd0: Mechanism: ejectable tray
wcd0: Medium: no/blank disc inside, unlocked


	2. My LS-120 still has no reliability with the driver, as reads are
corrupted extremely often.

wdc1: unit 0 (atapi): <LS-120 COSM   02              UHD Floppy/0271C09T>, removable, iordy
wfd0: medium type unknown (no disk)


	3. DMA is ineffective with file-system use. I can read from the raw
device rad0 at 4.5MB/s with a 1mb block size, but when I use iozone performance
is around 2.5MB/s. Mounting wd shouldn't affect that, should it? I used the
same device special files to mount as before, with ATA_STATIC being used,
and noticed this. Better yet, I'll try this with a corrected fstab then
report back. 


 Brian Feldman					  _ __  ___ ___ ___  
 green@unixhelp.org			      _ __ ___ | _ ) __|   \ 
	     http://www.freebsd.org/	 _ __ ___ ____ | _ \__ \ |) |
 FreeBSD: The Power to Serve!	   _ __ ___ ____ _____ |___/___/___/ 



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