Hello friends,

I am having a great deal of handicap with OpenBSD since I am unable to
use/access my SATA DVD drives. The machine would freeze and do nothing
till I reboot. ( I am running 4.0, it used to sometimes work with an old
installation)

Here is the excerpt from dmesg.

<<<<<<<<<<<<<<<<<<<

cd0 at scsibus0 targ 0 lun 0: <SONY, DVD RW AW-G170S, 1.72> SCSI0 5/cdrom
removab
le
cd0(pciide1:0:1): using PIO mode 4


<<<<<<<<<<<<<<<<<<<

I have been putting up with this issue ever since I bought a new machine
along with these brand new Sony SATA DVD writers. I initially suspected
a hardware problem and got them replaced three times.

It was only much later that I discovered that both the BIOS and linux
can read/write CD/DVD  correctly. Moreover the vendor told me that I am
the only customer to report a faulty piece.

Much to my chagrin, I later discovered that after all it is a software
issue.

Even now I do not wish to jump the gun and conclude a problem before I
try the 4.2 image. In case the problem persists I wish to know how I can
fix it.

The problem:

Every time I access the CD with the mount command, the machine freezes
mandating a hard reboot. Even if I try a "dvd+rw-format -f /dev/rcd0c"
it would hang.

Whilst installing from the CD ( not official), I can proceed till
the "extracting distributions" stage since the BIOS driver does the job
for you. Once the OpenBSD kernel tries to read the CD, the installation
process would hang. The way I got around this is by pointing it to a
local FTP server for the distributions.

I am concerned since I cannot use ddb ( apparently ) to figure out what
is going on.

How are such problems usually diagnosed?

In case you wish to see the complete dmesg on my Intel 82801 chipset,
please take a look.

http://www.sirsasana.org/misc/girish-dmesg.txt

Once I fix it I shall send the patch at the earliest. I have a bunch of
other patches with me too (mostly for USB NIC drivers )...

Thanks.

Any help is appreciated.

regards,
Girish

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