atapicam problem (again): hang on boot with DVD burner

[Sergey Lungu]

On Tue, 7 Feb 2006 01:59:11 +0300 Sergey Lungu <sergey.lungu at gmail.com>
wrote:

> Hi!
> 
> I'm not burning DVDs frequently, so I haven't seen this problem
> before. I have burned a DVD with growisofs and after that I am seeing
> a 3-5 min hang at boot time. No error messages at all, just hang :)
> 
> Here is what I have:
> 
> Copyright (c) 1992-2005 The FreeBSD Project.
> Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993,
> 1994 The Regents of the University of California. All rights
> reserved. FreeBSD 6.1-PRERELEASE #0: Fri Feb  3 11:35:18 MSK 2006
>     keyer at ogre.obchaga.org:/usr/obj/usr/src/sys/OGRE
> ACPI APIC Table: <A M I  OEMAPIC >
> Timecounter "i8254" frequency 1193182 Hz quality 0
> CPU: Intel(R) Pentium(R) 4 CPU 2.40GHz (2405.47-MHz 686-class CPU)
>   Origin = "GenuineIntel"  Id = 0xf41  Stepping = 1
> 
> [...]
> 
> acd0: DMA limited to UDMA33, controller found non-ATA66 cable
> acd0: DVDR <PIONEER DVD-RW DVR-110D/1.08> at ata1-master UDMA33
> cd0 at ata1 bus 0 target 0 lun 0
> cd0: <PIONEER DVD-RW  DVR-110D 1.08> Removable CD-ROM SCSI-0 device 
> cd0: 33.000MB/s transfers
> cd0: Attempt to query device size failed: NOT READY, Medium not
> present
> 
> [3-5 min hang goes here]
> 
> Trying to mount root from ufs:/dev/ad0s2a
> 
> The most interesting thing is that I had no such problem before using
> my DVD burner!
> 
> Is there a way to fix it?

I've been searching mailing-lists and PR-database for my problem
solution and found that setting hw.ata.atapi_dma to zero from loader
and turning it on back using atacontrol can help. I tried it, but this
one doesn't work for me.

Any ideas?

-- 
Sergey Lungu

In any series of calculations, errors tend to occur
at the opposite end to the end at which you begin
checking for errors.