On Sun, 29 Aug 2010, Buganini wrote:
BTW, it seems that DVD burning with ahci is broken, burning a CD is
okay, but I never burn a DVD sucessfully with ahci. Always get
somethings like "unable to wr...@60h input/output error" and many
"(cd0:ahcich2:0:0:0): SCSI sense: ILLEGAL REQUEST csi:43,0,0,c
asc:24,0 (Invalid field in CDB): Command byte 6 is invalid" in dmesg,
With ahci unloaded, I see "(cd0:ata4:0:0:0): SCSI sense: ILLEGAL
REQUEST csi:43,0,0,c asc:24,0 (Invalid field in CDB): Command byte 6
is invalid" once, but it works.
But I can read data DVD with ahci and sucessfully verify data with
diff.
While I have not had time to narrow it down, I have also had problems
with burning DVD+R on my drive (LITE-ON DVDRW LH-20A1S 9L09) with the
ahci driver on 8-STABLE using cdrecord. However, CD-RW's and DVD+RW's
are not a problem. At the beginning of a failed burn, it seems like
there is a short pause near the beginning (maybe after a block or two
has been written, but I do not recall).
If I find time, I will try again to burn a disc along with collecting
all the debugging information I can.
One thing I need to try, and you may too, is to see if there are any
firmware updates for the drive. I see there is one for mine which I
will try. Unfortunately, it does not say on the site what it improves
unless the "Match more media" is it.
Sean
--
s...@freebsd.org
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