David Webb wrote:
<The following command used to write a disk image, generated by K3b, to a
good
<quality DVD+R using an ASUS 'DRW-1608P3S':
<
<growisofs -dvd-compat -speed=4 -Z /dev/hdc=070113_Backup
<
<This filed while writing the first block of data to disk. Th output
contained
<the following error lines:
<
<:-( unable to TEST UNIT READY: Input/output error
<:-? the LUN appears to be stuck writing LBA=310h, retry in 94ms
<:-[ WRITE@LBA=c60h failed with SK=4h/ASC=08h/ACQ=03h]: Input/output error
<:-( write failed: Input/output error
<
<After this the DVD could be mounted. It had all the directories and some
<complete files but most files were blank.
<
<Hunting around the web, I found a pdf file containing the ATAPI error codes
<(and a lot more) at:
<
<
ftp://ftp.avc-pioneer.com/Mtfuji_7/Spec/Fuji7r06.pdf
<
<This shows that error 4/8/3 means "LOGICAL UNIT COMMUNICATION CRC ERROR
<(ULTRA-DMA/32)". This points to the cable connection. However I also
found
<a discussion at:
<
http://readlist.com/lists/vger.kernel.org/linux-kernel/16/82588.html
<From this and other comments I also concluded:
< 1. There may be a problem only affecting recent kernel versions.
< 2. There may be a problem associated with the ACPI system and DMA.
< 3. There may be a problem with the CPU disconnecting and connecting to
the
<bus when the CPU speed is changed due to load conditions.
<
<Based on all this I bought a DVD Lens cleaner and used it, switched off DMA
at
<software and bios level, switched off cpu frequency changing at bios level
<and after restarting the system, tried:
<
<growisofs -speed=1 -Z /dev/hdc=070113_Backup
<
<This worked right up to the time it tried to close the disk. The error
<messages and last few lines are:
<
<:-( unable to TEST UNIT READY: Input/output error
<:-? the LUN appears to be stuck writing LBA=310h, retry in 141ms
<....
<3391389696/3414702080 (99.3%) @3.9x, remaining 0:04
<3409674240/3414702080 (99.9%) @3.9x, remaining 0:00
<builtin_dd: 1667344*2KB out @ average 3.8x1385KBps
</dev/hdc: flushing cache
</dev/hdc: closing track
</dev/hdc: closing session
<:-[ CLOSE SESSION failed with SK=2h/ASC=04h/ACQ=07h]: Resource temporarily
<unavailable
</dev/hdc: reloading tray
<
<The last error message is wrong. 2/4/7 should read "LOGICAL UNIT NOT
READY,
<OPERATION IN PROGRESS" - so presumably it should have tried again after a
<wait.
<Unfortunately although 3.4 Gb had been successfully written, the DVD cannot
be
<mounted. The 'mount' command gives:
<mount: block device /dev/hdc is write-protected, mounting read-only
<mount: wrong fs type, bad option, bad superblock on /dev/hdc,
< missing codepage or other error
<Additionally 'dmesg' gives:
<cdrom: This disc doesn't have any tracks I recognize!
<attempt to access beyond end of device
<hdc: rw=0, want=68, limit=4
<isofs_fill_super: bread failed, dev=hdc, iso_blknum=16, block=16
<
<So I will have to put DVD writing on hold until I have a better idea. One
<question someone may be able to answer - is the superblock written last?
If
<so it might explain why the last disk cannot be mounted where the earlier
<failed disk(s) can.
<
It may be possible that you are looking at the wrong thing.
One thing in windows is that DVD writing software needs to have the commands
that will drive the processor of the DVD writer. This ends requiring
constant upgrades to DVD/CD writing software in windows to be able to drive
the new DVD/CD writer. It may be worth approaching someone with windows and
a copy of DVD writing software which is listed as being able to use you
particular DVD writer and seeing if the writer will write correctly.
I have an Aopen DUW160B in an external USB case it writes in windows at 8
speed is picked up by K3B in knoppix on a laptop as able to write at 8 speed
but will would not write greater than 1 speed. I had to write some data
using K3B yesturday using this DVD writor. Knoppix was unable to read the
disk but windows was able to do this.
The same writor in an external USB case will write at 8 speed using K3B in
SUSE with no trouble.
John Eayrs
