maybe you missed the _point_ of the riddle
Indeed. I was not aware of that.
Did you post the "READ FORMAT CAPACITIES:"
of a dvd+rw-mediainfo run on such a media ?
I remember to have seen some which report
"unformatted" as state and offer some
formatting descriptors. (None with 4 GB,
though.)
No, but BD-R[E] format capacity descriptors are more like guidelines.
Specification permits you to specify any value between minimum and
maximum (which you find among descriptors returned by the unit) with
granularity of 256 clusters. Indeed, here is output for media formatted
with -ssa=4G:
INQUIRY: [MATSHITA][BD-MLT SW-5582 ][BZE6]
GET [CURRENT] CONFIGURATION:
Mounted Media: 41h, BD-R SRM+POW
Media ID: PHILIP/R02
BD SPARE AREA INFORMATION:
Spare Area: 999424/1998848=50.0% free
POW RESOURCES INFORMATION:
Remaining Replacements:16843040
Remaining Map Entries: 0
Remaining Updates: 0
READ DISC INFORMATION:
Disc status: appendable
Number of Sessions: 1
State of Last Session: empty
"Next" Track: 1
Number of Tracks: 1
READ TRACK INFORMATION[#1]:
Track State: invisible incremental
Track Start Address: 0*2KB
Next Writable Address: 0*2KB
Free Blocks: 10220544*2KB
Track Size: 10220544*2KB
FABRICATED TOC:
Track#1 : [EMAIL PROTECTED]
Track#AA : [EMAIL PROTECTED]
Multi-session Info: [EMAIL PROTECTED]
READ CAPACITY: 10220544*2048=20931674112
Compare to descriptors offered for blank media:
READ FORMAT CAPACITIES:
unformatted: 12219392*2048=25025314816
00h(3000): 11826176*2048=24220008448
32h(0): 11826176*2048=24220008448
32h(0): 5796864*2048=11871977472
32h(0): 12088320*2048=24756879360
Note READ CAPACITY return value being off by ~4GB from unformatted. A.
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