short description:
This file documents my tests of growisofs (version 7.1)
performed on DVD+R disc, conducted to learn about usage of 
"-Z" / "-M" and "-dvd-compat" options.

After every write operation I checked (using file manager) that
the files were written.



calling "growisofs -Z" on empty DVD+R disc with intention to create appendable disc (writing files):

acerion@macondo3 16 $ growisofs -Z /dev/scd0 -J -R -iso-level=3 ~/current/cdw/cdw_tests/_DVD_batches/_3
Executing 'genisoimage -J -R -iso-level=3 /home/acerion/current/cdw/cdw_tests/_DVD_batches/_3 | builtin_dd of=/dev/scd0 obs=32k seek=0'
[...]
 98.80% done, estimate finish Mon Dec 29 16:34:44 2008
Total translation table size: 0
Total rockridge attributes bytes: 2700
Total directory bytes: 4096
Path table size(bytes): 38
Max brk space used 0
156878 extents written (306 MB)
builtin_dd: 156880*2KB out @ average 3.8x1352KBps
/dev/scd0: flushing cache
/dev/scd0: closing track
/dev/scd0: closing session

---------------------------------------
calling dvd+rw-mediainfo:

acerion@macondo3 17 $ dvd+rw-mediainfo /dev/scd0
INQUIRY:                [ASUS    ][DRW-2014L1T     ][1.00]
GET [CURRENT] CONFIGURATION:
 Mounted Media:         1Bh, DVD+R
 Media ID:              TDK/003
 Current Write Speed:   16.0x1385=22160KB/s
 Write Speed #0:        16.0x1385=22160KB/s
 Write Speed #1:        12.0x1385=16620KB/s
 Write Speed #2:        10.0x1385=13850KB/s
 Write Speed #3:        8.0x1385=11080KB/s
 Write Speed #4:        4.0x1385=5540KB/s
 Speed Descriptor#0:    00/2295103 R@8.0x1385=11080KB/s W@16.0x1385=22160KB/s
 Speed Descriptor#1:    00/2295103 R@8.0x1385=11080KB/s W@12.0x1385=16620KB/s
 Speed Descriptor#2:    00/2295103 R@8.0x1385=11080KB/s W@10.0x1385=13850KB/s
 Speed Descriptor#3:    00/2295103 R@8.0x1385=11080KB/s W@8.0x1385=11080KB/s
 Speed Descriptor#4:    00/2295103 R@8.0x1385=11080KB/s W@4.0x1385=5540KB/s
READ DVD STRUCTURE[#0h]:
 Media Book Type:       00h, DVD-ROM book [revision 0]
 Legacy lead-out at:    2295104*2KB=4700372992
READ DISC INFORMATION:
 Disc status:           appendable
 Number of Sessions:    2
 State of Last Session: empty
 "Next" Track:          2
 Number of Tracks:      2
READ TRACK INFORMATION[#1]:
 Track State:           invisible
 Track Start Address:   0*2KB
 Free Blocks:           0*2KB
 Track Size:            156880*2KB
READ TRACK INFORMATION[#2]:
 Track State:           blank
 Track Start Address:   158928*2KB
 Next Writable Address: 158928*2KB
 Free Blocks:           2136176*2KB
 Track Size:            2136176*2KB
FABRICATED TOC:
 Track#1  :             14@0
 Track#AA :             14@156880
 Multi-session Info:    #1@0
READ CAPACITY:          156880*2048=321290240

disc is non-empty and seems to be appendable

---------------------------------------
calling "growisofs -M" on non-empty, appendable DVD+R disc with intention to append data and don't close disc (writing files):

acerion@macondo3 17 $ growisofs -M /dev/scd0 -J -R -iso-level=3 ~/current/cdw/cdw_tests/_DVD_batches/_2
Executing 'genisoimage -C 16,158928 -M /dev/fd/3 -J -R -iso-level=3 /home/acerion/current/cdw/cdw_tests/_DVD_batches/_2 | builtin_dd of=/dev/scd0 obs=32k seek=9933'
Setting input-charset to 'UTF-8' from locale.
ISO-9660 image includes checksum signature for correct inode numbers.
Rock Ridge signatures found
[...]
 98.94% done, estimate finish Mon Dec 29 16:38:59 2008
Total translation table size: 0
Total rockridge attributes bytes: 5873
Total directory bytes: 10240
Path table size(bytes): 60
Max brk space used 0
83664 extents written (163 MB)
builtin_dd: 83664*2KB out @ average 3.3x1352KBps
/dev/scd0: flushing cache
/dev/scd0: closing track
/dev/scd0: closing session

---------------------------------------
calling dvd+rw-mediainfo:
acerion@macondo3 18 $ dvd+rw-mediainfo /dev/scd0
INQUIRY:                [ASUS    ][DRW-2014L1T     ][1.00]
GET [CURRENT] CONFIGURATION:
 Mounted Media:         1Bh, DVD+R
 Media ID:              TDK/003
 Current Write Speed:   16.0x1385=22160KB/s
 Write Speed #0:        16.0x1385=22160KB/s
 Write Speed #1:        12.0x1385=16620KB/s
 Write Speed #2:        10.0x1385=13850KB/s
 Write Speed #3:        8.0x1385=11080KB/s
 Write Speed #4:        4.0x1385=5540KB/s
 Speed Descriptor#0:    00/2295103 R@8.0x1385=11080KB/s W@16.0x1385=22160KB/s
 Speed Descriptor#1:    00/2295103 R@8.0x1385=11080KB/s W@12.0x1385=16620KB/s
 Speed Descriptor#2:    00/2295103 R@8.0x1385=11080KB/s W@10.0x1385=13850KB/s
 Speed Descriptor#3:    00/2295103 R@8.0x1385=11080KB/s W@8.0x1385=11080KB/s
 Speed Descriptor#4:    00/2295103 R@8.0x1385=11080KB/s W@4.0x1385=5540KB/s
READ DVD STRUCTURE[#0h]:
 Media Book Type:       00h, DVD-ROM book [revision 0]
 Legacy lead-out at:    2295104*2KB=4700372992
READ DISC INFORMATION:
 Disc status:           appendable
 Number of Sessions:    3
 State of Last Session: empty
 "Next" Track:          3
 Number of Tracks:      3
READ TRACK INFORMATION[#1]:
 Track State:           invisible
 Track Start Address:   0*2KB
 Free Blocks:           0*2KB
 Track Size:            156880*2KB
READ TRACK INFORMATION[#2]:
 Track State:           invisible
 Track Start Address:   158928*2KB
 Free Blocks:           0*2KB
 Track Size:            83664*2KB
READ TRACK INFORMATION[#3]:
 Track State:           blank
 Track Start Address:   244640*2KB
 Next Writable Address: 244640*2KB
 Free Blocks:           2050464*2KB
 Track Size:            2050464*2KB
FABRICATED TOC:
 Track#1  :             14@0
 Track#2  :             14@158928
 Track#AA :             14@242592
 Multi-session Info:    #2@158928
READ CAPACITY:          242592*2048=496828416

disc is non-empty and seems to be appendable

---------------------------------------
calling "growisofs -M" on non-empty, appendable DVD+R disc with intention to append even more data and don't close disc (writing files):

growisofs -M /dev/scd0 -J -R -iso-level=3 ~/current/cdw/cdw_tests/_DVD_batches/_1
Executing 'genisoimage -C 158944,244640 -M /dev/fd/3 -J -R -iso-level=3 /home/acerion/current/cdw/cdw_tests/_DVD_batches/_1 | builtin_dd of=/dev/scd0 obs=32k seek=15290'
[...]
 98.40% done, estimate finish Mon Dec 29 16:43:05 2008
Total translation table size: 0
Total rockridge attributes bytes: 9453
Total directory bytes: 18432
Path table size(bytes): 120
Max brk space used 0
60233 extents written (117 MB)
builtin_dd: 60240*2KB out @ average 2.9x1352KBps
/dev/scd0: flushing cache
/dev/scd0: closing track
/dev/scd0: closing session

so disc is still appendable


---------------------------------------
calling dvd+rw-mediainfo:

acerion@macondo3 19 $ dvd+rw-mediainfo /dev/scd0
INQUIRY:                [ASUS    ][DRW-2014L1T     ][1.00]
GET [CURRENT] CONFIGURATION:
 Mounted Media:         1Bh, DVD+R
 Media ID:              TDK/003
 Current Write Speed:   16.0x1385=22160KB/s
 Write Speed #0:        16.0x1385=22160KB/s
 Write Speed #1:        12.0x1385=16620KB/s
 Write Speed #2:        10.0x1385=13850KB/s
 Write Speed #3:        8.0x1385=11080KB/s
 Write Speed #4:        4.0x1385=5540KB/s
 Speed Descriptor#0:    00/2295103 R@4.0x1385=5540KB/s W@16.0x1385=22160KB/s
 Speed Descriptor#1:    00/2295103 R@4.0x1385=5540KB/s W@12.0x1385=16620KB/s
 Speed Descriptor#2:    00/2295103 R@4.0x1385=5540KB/s W@10.0x1385=13850KB/s
 Speed Descriptor#3:    00/2295103 R@4.0x1385=5540KB/s W@8.0x1385=11080KB/s
 Speed Descriptor#4:    00/2295103 R@4.0x1385=5540KB/s W@4.0x1385=5540KB/s
READ DVD STRUCTURE[#0h]:
 Media Book Type:       00h, DVD-ROM book [revision 0]
 Legacy lead-out at:    2295104*2KB=4700372992
READ DISC INFORMATION:
 Disc status:           appendable
 Number of Sessions:    4
 State of Last Session: empty
 "Next" Track:          4
 Number of Tracks:      4
READ TRACK INFORMATION[#1]:
 Track State:           invisible
 Track Start Address:   0*2KB
 Free Blocks:           0*2KB
 Track Size:            156880*2KB
READ TRACK INFORMATION[#2]:
 Track State:           invisible
 Track Start Address:   158928*2KB
 Free Blocks:           0*2KB
 Track Size:            83664*2KB
READ TRACK INFORMATION[#3]:
 Track State:           invisible
 Track Start Address:   244640*2KB
 Free Blocks:           0*2KB
 Track Size:            60240*2KB
READ TRACK INFORMATION[#4]:
 Track State:           blank
 Track Start Address:   306928*2KB
 Next Writable Address: 306928*2KB
 Free Blocks:           1988176*2KB
 Track Size:            1988176*2KB
FABRICATED TOC:
 Track#1  :             14@0
 Track#2  :             14@158928
 Track#3  :             14@244640
 Track#AA :             14@304880
 Multi-session Info:    #3@244640
READ CAPACITY:          304880*2048=624394240

disc is non-empty and appendable

---------------------------------------
calling "growisofs -dvd-compat -M" on non-empty, appendable DVD+R disc with intention to write final session and close disc (writing files):

acerion@macondo3 19 $ growisofs -dvd-compat -M /dev/scd0 -J -R -iso-level=3 ~/current/cdw/cdw_tests/_DVD_batches/_5
Executing 'genisoimage -C 244656,306928 -M /dev/fd/3 -J -R -iso-level=3 /home/acerion/current/cdw/cdw_tests/_DVD_batches/_5 | builtin_dd of=/dev/scd0 obs=32k seek=19183'
[...]
 99.44% done, estimate finish Mon Dec 29 16:46:04 2008
Total translation table size: 0
Total rockridge attributes bytes: 11280
Total directory bytes: 22528
Path table size(bytes): 148
Max brk space used 0
115426 extents written (225 MB)
builtin_dd: 115440*2KB out @ average 4.0x1352KBps
/dev/scd0: flushing cache
/dev/scd0: closing track
/dev/scd0: closing session

---------------------------------------
calling dvd+rw-mediainfo:

acerion@macondo3 20 $ dvd+rw-mediainfo /dev/scd0
INQUIRY:                [ASUS    ][DRW-2014L1T     ][1.00]
GET [CURRENT] CONFIGURATION:
 Mounted Media:         1Bh, DVD+R
 Media ID:              TDK/003
 Current Write Speed:   16.0x1385=22160KB/s
 Write Speed #0:        16.0x1385=22160KB/s
 Write Speed #1:        12.0x1385=16620KB/s
 Write Speed #2:        10.0x1385=13850KB/s
 Write Speed #3:        8.0x1385=11080KB/s
 Write Speed #4:        4.0x1385=5540KB/s
 Speed Descriptor#0:    00/2295103 R@8.0x1385=11080KB/s W@16.0x1385=22160KB/s
 Speed Descriptor#1:    00/2295103 R@8.0x1385=11080KB/s W@12.0x1385=16620KB/s
 Speed Descriptor#2:    00/2295103 R@8.0x1385=11080KB/s W@10.0x1385=13850KB/s
 Speed Descriptor#3:    00/2295103 R@8.0x1385=11080KB/s W@8.0x1385=11080KB/s
 Speed Descriptor#4:    00/2295103 R@8.0x1385=11080KB/s W@4.0x1385=5540KB/s
READ DVD STRUCTURE[#0h]:
 Media Book Type:       00h, DVD-ROM book [revision 0]
 Legacy lead-out at:    2295104*2KB=4700372992
READ DISC INFORMATION:
 Disc status:           appendable
 Number of Sessions:    5
 State of Last Session: empty
 "Next" Track:          5
 Number of Tracks:      5
READ TRACK INFORMATION[#1]:
 Track State:           invisible
 Track Start Address:   0*2KB
 Free Blocks:           0*2KB
 Track Size:            156880*2KB
READ TRACK INFORMATION[#2]:
 Track State:           invisible
 Track Start Address:   158928*2KB
 Free Blocks:           0*2KB
 Track Size:            83664*2KB
READ TRACK INFORMATION[#3]:
 Track State:           invisible
 Track Start Address:   244640*2KB
 Free Blocks:           0*2KB
 Track Size:            60240*2KB
READ TRACK INFORMATION[#4]:
 Track State:           invisible
 Track Start Address:   306928*2KB
 Free Blocks:           0*2KB
 Track Size:            115440*2KB
READ TRACK INFORMATION[#5]:
 Track State:           blank
 Track Start Address:   424416*2KB
 Next Writable Address: 424416*2KB
 Free Blocks:           1870688*2KB
 Track Size:            1870688*2KB
FABRICATED TOC:
 Track#1  :             14@0
 Track#2  :             14@158928
 Track#3  :             14@244640
 Track#4  :             14@306928
 Track#AA :             14@422368
 Multi-session Info:    #4@306928
READ CAPACITY:          422368*2048=865009664

disc is non-empty and seems to be appendable

---------------------------------------
calling "growisofs -M" on DVD-R disc that I tried to close in previous step:

acerion@macondo3 20 $ growisofs -M /dev/scd0 -J -R -iso-level=3 ~/current/cdw/cdw_tests/_DVD_batches/_4
Executing 'genisoimage -C 306944,424416 -M /dev/fd/3 -J -R -iso-level=3 /home/acerion/current/cdw/cdw_tests/_DVD_batches/_4 | builtin_dd of=/dev/scd0 obs=32k seek=26526'
[...]
 99.44% done, estimate finish Mon Dec 29 16:50:43 2008
Total translation table size: 0
Total rockridge attributes bytes: 13797
Total directory bytes: 26624
Path table size(bytes): 176
Max brk space used 0
158881 extents written (310 MB)
builtin_dd: 158896*2KB out @ average 4.6x1352KBps
/dev/scd0: flushing cache
/dev/scd0: closing track
/dev/scd0: closing session

conclusion: option "-dvd-compat" does not close appednable DVD-R disc that already has some data;


=======================================
using new, blank DVD+R
=======================================

calling "growisofs -dvd-compat -Z" on empty DVD+R disc with intention to create non-appendable disc (writing image):

acerion@macondo3 21 $ growisofs -dvd-compat -Z /dev/scd0 ~/current/cdw/cdw_tests/_DVD_batches/_5/
Executing 'genisoimage /home/acerion/current/cdw/cdw_tests/_DVD_batches/_5/ | builtin_dd of=/dev/scd0 obs=32k seek=0'
Setting input-charset to 'UTF-8' from locale.
[...]
 99.66% done, estimate finish Mon Dec 29 16:58:11 2008
Total translation table size: 0
Total rockridge attributes bytes: 0
Total directory bytes: 2048
Path table size(bytes): 26
Max brk space used 0
115401 extents written (225 MB)
builtin_dd: 115408*2KB out @ average 2.8x1352KBps
/dev/scd0: flushing cache
/dev/scd0: closing track
/dev/scd0: closing disc

---------------------------------------
calling dvd+rw-mediainfo:

acerion@macondo3 21 $ dvd+rw-mediainfo /dev/scd0
INQUIRY:                [ASUS    ][DRW-2014L1T     ][1.00]
GET [CURRENT] CONFIGURATION:
 Mounted Media:         1Bh, DVD+R
 Media ID:              TDK/003
 Current Write Speed:   16.0x1385=22160KB/s
 Write Speed #0:        16.0x1385=22160KB/s
 Write Speed #1:        12.0x1385=16620KB/s
 Write Speed #2:        10.0x1385=13850KB/s
 Write Speed #3:        8.0x1385=11080KB/s
 Write Speed #4:        4.0x1385=5540KB/s
 Speed Descriptor#0:    00/2295103 R@4.0x1385=5540KB/s W@16.0x1385=22160KB/s
 Speed Descriptor#1:    00/2295103 R@4.0x1385=5540KB/s W@12.0x1385=16620KB/s
 Speed Descriptor#2:    00/2295103 R@4.0x1385=5540KB/s W@10.0x1385=13850KB/s
 Speed Descriptor#3:    00/2295103 R@4.0x1385=5540KB/s W@8.0x1385=11080KB/s
 Speed Descriptor#4:    00/2295103 R@4.0x1385=5540KB/s W@4.0x1385=5540KB/s
READ DVD STRUCTURE[#0h]:
 Media Book Type:       00h, DVD-ROM book [revision 0]
 Legacy lead-out at:    115408*2KB=236355584
READ DISC INFORMATION:
 Disc status:           complete
 Number of Sessions:    1
 State of Last Session: complete
 Number of Tracks:      1
READ TRACK INFORMATION[#1]:
 Track State:           invisible
 Track Start Address:   0*2KB
 Free Blocks:           0*2KB
 Track Size:            115408*2KB
FABRICATED TOC:
 Track#1  :             14@0
 Track#AA :             14@115408
 Multi-session Info:    #1@0
READ CAPACITY:          115408*2048=236355584

disc is non-empty and seems to be non-appendable

---------------------------------------
calling "growisofs -M" on non-empty DVD+R disc that should be non-appendable:

acerion@macondo3 22 $ growisofs -M /dev/scd0 ~/current/cdw/cdw_tests/_DVD_batches/_2
:-( media is not appendable


conclusion: using "-dvd-compat -Z" for writing files to empty DVD+R disc creates non-appendable disc



=======================================
using new, blank DVD+R
=======================================

calling "growisofs -Z" on empty DVD+R disc to create appendable disc (writing image):

acerion@macondo3 2 $ growisofs -Z /dev/scd0=/tmp/testowy.iso
Executing 'builtin_dd if=/tmp/testowy.iso of=/dev/scd0 obs=32k seek=0'
/dev/scd0: "Current Write Speed" is 16.4x1352KBps.
[...]
  167378944/171335680 (97.7%) @6.9x, remaining 0:01 RBU  11.8% UBU  99.8%
builtin_dd: 83664*2KB out @ average 2.9x1352KBps
/dev/scd0: flushing cache
/dev/scd0: closing track
/dev/scd0: closing session

---------------------------------------
calling dvd+rw-mediainfo:

acerion@macondo3 4 $ dvd+rw-mediainfo /dev/scd0
INQUIRY:                [ASUS    ][DRW-2014L1T     ][1.00]
GET [CURRENT] CONFIGURATION:
 Mounted Media:         1Bh, DVD+R
 Media ID:              TDK/003
 Current Write Speed:   16.0x1385=22160KB/s
 Write Speed #0:        16.0x1385=22160KB/s
 Write Speed #1:        12.0x1385=16620KB/s
 Write Speed #2:        10.0x1385=13850KB/s
 Write Speed #3:        8.0x1385=11080KB/s
 Write Speed #4:        4.0x1385=5540KB/s
 Speed Descriptor#0:    00/2295103 R@8.0x1385=11080KB/s W@16.0x1385=22160KB/s
 Speed Descriptor#1:    00/2295103 R@8.0x1385=11080KB/s W@12.0x1385=16620KB/s
 Speed Descriptor#2:    00/2295103 R@8.0x1385=11080KB/s W@10.0x1385=13850KB/s
 Speed Descriptor#3:    00/2295103 R@8.0x1385=11080KB/s W@8.0x1385=11080KB/s
 Speed Descriptor#4:    00/2295103 R@8.0x1385=11080KB/s W@4.0x1385=5540KB/s
READ DVD STRUCTURE[#0h]:
 Media Book Type:       00h, DVD-ROM book [revision 0]
 Legacy lead-out at:    2295104*2KB=4700372992
READ DISC INFORMATION:
 Disc status:           appendable
 Number of Sessions:    2
 State of Last Session: empty
 "Next" Track:          2
 Number of Tracks:      2
READ TRACK INFORMATION[#1]:
 Track State:           invisible
 Track Start Address:   0*2KB
 Free Blocks:           0*2KB
 Track Size:            83664*2KB
READ TRACK INFORMATION[#2]:
 Track State:           blank
 Track Start Address:   85712*2KB
 Next Writable Address: 85712*2KB
 Free Blocks:           2209392*2KB
 Track Size:            2209392*2KB
FABRICATED TOC:
 Track#1  :             14@0
 Track#AA :             14@83664
 Multi-session Info:    #1@0
READ CAPACITY:          83664*2048=171343872

disc is non-empty and seems to be appendable

---------------------------------------
calling (growisofs -M) to check if disc is appendable (writing files):

growisofs -M /dev/scd0 -J -R -iso-level=3 ~/current/cdw/cdw_tests/_DVD_batches/_5
Executing 'genisoimage -C 16,85712 -M /dev/fd/3 -J -R -iso-level=3 /home/acerion/current/cdw/cdw_tests/_DVD_batches/_5 | builtin_dd of=/dev/scd0 obs=32k seek=5357'
[...]
 99.44% done, estimate finish Mon Dec 29 20:53:11 2008
Total translation table size: 0
Total rockridge attributes bytes: 5166
Total directory bytes: 10240
Path table size(bytes): 60
Max brk space used 0
115415 extents written (225 MB)
builtin_dd: 115424*2KB out @ average 4.0x1352KBps
/dev/scd0: flushing cache
/dev/scd0: closing track
/dev/scd0: closing session

disc was appendable;

conclusion: writing image to empty disc with "-Z" option only creates appendable disc;

=======================================
using new, blank DVD+R
=======================================

calling "growisofs -dvd-compat -Z" with intention to create non-appendable disc (writing iso image):

acerion@macondo3 4 $ growisofs -dvd-compat -Z /dev/scd0=/tmp/testowy.iso
Executing 'builtin_dd if=/tmp/testowy.iso of=/dev/scd0 obs=32k seek=0'
/dev/scd0: "Current Write Speed" is 16.4x1352KBps.
[...]
  165511168/171335680 (96.6%) @6.5x, remaining 0:01 RBU  17.4% UBU  99.8%
builtin_dd: 83664*2KB out @ average 2.9x1352KBps
/dev/scd0: flushing cache
/dev/scd0: closing track
/dev/scd0: closing disc

---------------------------------------
calling dvd+rw-mediainfo:

acerion@macondo3 6 $ dvd+rw-mediainfo /dev/scd0
INQUIRY:                [ASUS    ][DRW-2014L1T     ][1.00]
GET [CURRENT] CONFIGURATION:
 Mounted Media:         1Bh, DVD+R
 Media ID:              TDK/003
 Current Write Speed:   16.0x1385=22160KB/s
 Write Speed #0:        16.0x1385=22160KB/s
 Write Speed #1:        12.0x1385=16620KB/s
 Write Speed #2:        10.0x1385=13850KB/s
 Write Speed #3:        8.0x1385=11080KB/s
 Write Speed #4:        4.0x1385=5540KB/s
 Speed Descriptor#0:    00/2295103 R@4.0x1385=5540KB/s W@16.0x1385=22160KB/s
 Speed Descriptor#1:    00/2295103 R@4.0x1385=5540KB/s W@12.0x1385=16620KB/s
 Speed Descriptor#2:    00/2295103 R@4.0x1385=5540KB/s W@10.0x1385=13850KB/s
 Speed Descriptor#3:    00/2295103 R@4.0x1385=5540KB/s W@8.0x1385=11080KB/s
 Speed Descriptor#4:    00/2295103 R@4.0x1385=5540KB/s W@4.0x1385=5540KB/s
READ DVD STRUCTURE[#0h]:
 Media Book Type:       00h, DVD-ROM book [revision 0]
 Legacy lead-out at:    83664*2KB=171343872
READ DISC INFORMATION:
 Disc status:           complete
 Number of Sessions:    1
 State of Last Session: complete
 Number of Tracks:      1
READ TRACK INFORMATION[#1]:
 Track State:           invisible
 Track Start Address:   0*2KB
 Free Blocks:           0*2KB
 Track Size:            83664*2KB
FABRICATED TOC:
 Track#1  :             14@0
 Track#AA :             14@83664
 Multi-session Info:    #1@0
READ CAPACITY:          83664*2048=171343872

disc is non-empty and seems to be closed;

---------------------------------------
calling "growisofs -M" to check if disc is appendable:

acerion@macondo3 5 $ growisofs -M /dev/scd0 -J -R -iso-level=3 ~/current/cdw/cdw_tests/_DVD_batches/_5
:-( media is not appendable

conclusion: calling growisofs with "-dvd-compat -Z" when writing image to empty DVD+R disc creates non-appendable disc




end
