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From: Tai-hwa Liang <avatar@mmlab.cse.yzu.edu.tw>
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Cc: sos@freebsd.org
Subject: Unable to burncd in RELENG_6 and HEAD
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kernel: cvsup'ed as of today, built w/o "device atapicam"
laptop:	Acer Aspire 2020

arcade# cat i386cd.iso | burncd -v -f /dev/acd0 data - fixate
adding type 0x08 file - size 64 KB 0 blocks
next writeable LBA 0
addr = 0 size = -1 blocks = 0
writing from stdin

Input/output error

fixating CD, please wait..
burncd: ioctl(CDRIOCFIXATE): Input/output error
arcade#

dmesg says:
acd0: FAILURE - WRITE_BIG ILLEGAL REQUEST asc=0x2c ascq=0x00 error=4<ABORTED>
acd0: FAILURE - CLOSE_TRACK/SESSION ILLEGAL REQUEST asc=0x2c ascq=0x00 error=4<ABORTED>

boot dmesg:
acd0: setting PIO4 on Intel ICH4 chip
acd0: setting UDMA33 on Intel ICH4 chip
acd0: <MATSHITACD-RW CW-8123/CW23> CDRW drive at ata1 as master
acd0: read 4133KB/s (4133KB/s) write 4133KB/s (4133KB/s), 2048KB buffer, UDMA33
acd0: Reads: CDR, CDRW, CDDA stream, DVDROM, DVDR, DVDRAM, packet
acd0: Writes: CDR, CDRW, test write, burnproof
acd0: Audio: play, 255 volume levels
acd0: Mechanism: ejectable caddy, unlocked
acd0: Medium: no/blank disc