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Date:      Fri, 31 Mar 2000 18:46:28 -0700
From:      Warner Losh <imp@village.org>
To:        Grigoriy Strokin <grg@philol.msu.ru>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: Audio record problems in 4.0-STABLE: 1. Creative ViBRA16X 
Message-ID:  <200004010146.SAA39067@harmony.village.org>
In-Reply-To: Your message of "Fri, 31 Mar 2000 02:05:42 %2B0400." <20000331020541.A3613@isabase.philol.msu.ru> 
References:  <20000331020541.A3613@isabase.philol.msu.ru>  <20000326200211.A6863@isabase.philol.msu.ru> 

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In message <20000331020541.A3613@isabase.philol.msu.ru> Grigoriy Strokin writes:
: While the bug wiping out filesystems on machines with Apollo MVP3 when ATA
: driver is in UDMA mode is being fixed, I suppose there at least should be some
: note added to /usr/src/UPDATING, so that another users do not loss
: all their data and have to reinitialize /usr and restore it from backup, as I
: had to do?
: 
: Something like that:
:     If you use the Apollo MVP3 chipset, it is STRONGLY
:     recommended that you disable the use of DMA mode in ATA drivers
:     BEFORE you try to boot the system after `make installworld'.
:     Add the following line:
:       /sbin/sysctl -w hw.atamodes=pio,pio,pio,pio
:     to the very beginning of your /etc/rc,
:     ~root/.profile and ~root/.login.
:     Be warned that if you don't disable the DMA mode,
:     all your filesystems may be corrupted because
:     of a bug in the driver that is still being fixed.

How about

QUIRKS:
	The ata driver has some issues with the Apollo MVP3 chipset.
	Drives work only in pio mode and must be set to pio mode early
	int the boot process.  Do not upgrade.  If you must upgrade
	in the face of this, add
		/sbin/sysctl -w hw.atamodes=pio,pio,pio,pio
	to the start of /etc/rc.conf.  Even if you do this, any and
	all damage to your system is at your own risk.  You have been
	warned.

Warner


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