[Stingray]

Hello.
I bought two packs of Verbatim 100 GB M-DISC BD-R XL discs from Japan, made in Japan by Mitsubishi. One of the packs turned out to be already written.
It contains a large amount of information about a museum, contracts, and other related documents.




I scanned 1 disc. What exactly is this? Can anyone explain? I have never seen a write graph/start-of-disc pattern like this before.
The disc was burned using an LG BU1VERA drive.






Recorder info : HLDS BD-DRIVE HLDS-BU1VERA J5F71805 0
Read speeds:
RD speed max: 6.0X (26976 kB/s)
RD speed #00: 2.0X (8992 kB/s)
RD speed #01: 3.0X (13488 kB/s)
RD speed #02: 4.0X (17984 kB/s)
RD speed #03: 6.0X (26976 kB/s)
Write speeds:
D WR speed max: 4.0X (17984 kB/s)
D WR speed #00: 4.0X (17984 kB/s)
D WR speed #01: 2.0X (8992 kB/s)
Media class : BD
Media type : BD-R (Sequential)
Media size : 120mm
Polarity flags: 00
Disc Category : HTL
PPB speeds : 2X 3X 4X 6X
Layers : 3
Erasable : no
Disc state : Incomplete
Session state : Incomplete
Read capacity : 47305728 sectors/92394MB/10512:23.03MSF
Free capacity : 0 sectors/0MB/00:00.00MSF
Total capacity: 47305728 sectors/92394MB/10512:23.03MSF
Media ID : VERBAT-IMk/000
BCA0: 04 1E 10 15 50 03 03 02 19 12 25 08 20 07 39 C4
BCA1: 04 1E 10 15 50 03 03 02 19 12 25 08 20 07 39 C4
BCA2: FC 42 44 52 12 32 05 00 00 00 00 00 00 00 00 00
BCA3: FC 42 44 52 12 32 05 00 00 00 00 00 00 00 00 00
MID raw data 00: 44 49 05 30 00 00 60 00 42 44 52 12 32 05 00 00 | DI.0..`.BDR.2...
MID raw data 10: 01 00 00 00 02 00 00 00 21 13 7E 00 02 E2 78 78 | ........!.~..?xx
MID raw data 20: 00 01 06 56 71 86 02 3E 1D 5F 28 28 18 10 10 54 | ...Vq?.>._...T
MID raw data 30: 54 54 3C 3C C4 D8 D8 68 68 A0 A0 A8 AC AC 00 00 | TT<<?ØØhh ?..
MID raw data 40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
MID raw data 50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................
MID raw data 60: 00 00 00 00 56 45 52 42 41 54 49 4D 6B 00 00 00 | ....VERBATIMk...
Total tracks : 4
Track: Session TMode DMode Start End Size Free Next Writable
Track# 1 1 4 1 0 0 25600 25248 352
Track# 2 1 4 1 25600 0 524288 397184 152704
Track# 3 1 4 1 549888 0 46755552 3497056 43808384
Track# 4 1 4 1 47305440 0 288 0 0


I tried to import last session


I started scanning the second disc. It also has four sessions, but it looks as though the entire disc is showing maximum LDC/BIS, and no data is visible in the folders at all.

Could this be encryption or some kind of special archiving format? Perhaps they forgot to enable it for session 3 on the first disc?