Mailinglist Archive: packet-writing (124 mails)

[Morten Bo Johansen <mojo@xxxxxxxx>]

Jens Axboe <axboe@xxxxxxx> wrote:


> Next pre is up, changes since pre2:

> [...]


Yesterday with pre2 I had dire problems, so many that I gave up
on making a proper bug report but basically it freaked out
completely with scsi host resetting errors and kernel panic
messages that took control over my tty + kbd when I tried to do
the formatting part - and I was not able to log anything either. 
Eventually I had to push the big button.

I tried again today with pre3 and still I don't get past the
formatting hurdle. Here's what happens when I try to format a
disc:

		      --------------------

root@olafrye:/home/mojo# cdrwtool -d /dev/sr1 -q
using device /dev/sr1
768KB internal buffer
setting write speed to 12x
Settings for /dev/sr1:
        Fixed packets, size 32
        Mode-2 disc

I'm going to do a quick setup of /dev/sr1. The disc is going to be blanked and
 formatted with one big track. All data on the device will be lost!! Press CTR
L-C to cancel now.

Initiating quick disc blank
Disc capacity is 274944 blocks (549888KB/537MB)
Formatting track

Writing UDF structures to disc
7200 (CEST)/-120

		      --------------------
		      
		      
While writing those structures my system freezes completely and
once again I have to resort to power recycling.

Surely my system consists of some cheapo hardware, the cdrw
device being a Phillips CDD 3610, but I think it ought to work
anyway.

There are two things I noticed from the output above: 

1) that cdrwtool sets the writing speed to 12x by default while
my drive is only capable of 2x. I suspect that it should not
really matter and that using 12x would just mean that the
maximum speed of my drive is being used but nevertheless I
might ask: do you think that it might make a difference setting
the speed with the "t" parameter..?

2) The disc capacity is being calculated as 537 mb - why..?



As for the rest I have followed the install instructions in the
readme file meticulously. I have compiled with modules and I
have enabled write caching and retained the default of 256 kb of
data gathering buffer. I got the UDF cvs tree and compiled and
installed the udf module. Prior to this I bumped up my kernel
version to 2.4.4-pre6 and rebooted.



Regards,

Morten

-- 
"It is characteristic of the present time always to be conscious of the 
 medium. It is almost bound to end in madness, like a man who whenever 
 he looked at the sun and the stars was conscious of the world going round."
                                                             (Kierkegaard)