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growisofs hangs on DD0203

I have an OptoRite DD0203, and I'm having trouble writing DVD+RWs.
Everytime I invoke growisofs, it goes through the entire writing
process, but then it hangs when flushing the cache at the end (before
closing the track and the session). I've tried both the ATAPI and
ide-scsi transports, and also firmware versions 2.06  and 2.30, without
success. When this problem occurs, I can no longer open the DVD tray
until I power-cycle the computer. But once I reboot and popd the DVD+RW
back in, dvd+rw-mediainfo still shows it as being blank.

Has anyone else ever encountered this?

=== start of log ===
dtessier@hobbes dtessier $ dvd+rw-mediainfo /dev/dvd
INQUIRY:                [OPTORITE][DVD RW DD0203   ][2.30]
 Mounted Media:         1Ah, DVD+RW
 Current Write Speed:   2.4x1385=3324KB/s
 Write Speed #0:        1.0x1385=1385KB/s
 Write Speed #1:        2.0x1385=2770KB/s
 Write Speed #2:        4.0x1385=5540KB/s
:-( unit fails to report current write performance
 Speed Descriptor#0:    00/144703 R@4.0x1385=5540KB/s
 Speed Descriptor#1:    00/144703 R@4.0x1385=5540KB/s
 Media Book Type:       92h, DVD+RW book [revision 2]
 Media ID:              RICKHJPN/W11
 Legacy lead-out at:    2295104*2KB=4700372992
 Disc status:           blank
 Number of Sessions:    1
 State of Last Session: empty
 Number of Tracks:      1
 Track State:           blank
 Track Start Address:   0*2KB
 Free Blocks:           2295104*2KB
 Track Size:            2295104*2KB
dtessier@hobbes dtessier $ growisofs -Z /dev/dvd=/media/pics.iso
Executing 'builtin_dd if=/media/pics.iso of=/dev/dvd obs=32k seek=0'
/dev/dvd: pre-formatting blank DVD+RW...
/dev/dvd: "Current Write Speed" is 2.5x1385KBps.
  20152320/2657017856 ( 0.8%) @4.3x, remaining 13:05
  31293440/2657017856 ( 1.2%) @2.4x, remaining 12:35
  42401792/2657017856 ( 1.6%) @2.3x, remaining 13:21
  53542912/2657017856 ( 2.0%) @2.4x, remaining 12:57
  64651264/2657017856 ( 2.4%) @2.3x, remaining 12:41
2609446912/2657017856 (98.2%) @2.3x, remaining 0:14
2620588032/2657017856 (98.6%) @2.4x, remaining 0:10
2631729152/2657017856 (99.0%) @2.4x, remaining 0:07
2642870272/2657017856 (99.5%) @2.4x, remaining 0:04
2654011392/2657017856 (99.9%) @2.4x, remaining 0:00
builtin_dd: 1297376*2KB out
/dev/dvd: flushing cache

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