The disc and its file names

Tony Hawk: SHRED ships on a PlayStation 3 Blu-ray, volume HAWKPS3, 2,871,328 sectors, with trophy set NPWR01369_00. The dump examined has 1,124 files, 5,875,743,333 bytes, in an ISO of 5,880,479,744 bytes. Observed The disc is a decrypted dump: sector 0 holds the PS3 region table, but the ranges it marks as encrypted contain plaintext (PAK\0, SCE\0, RIFF), so no disc key is needed to read it. Observed PARAM.SFO gives title Tony Hawk: SHRED, title ID BLUS30542 and version 01.00. Proven

What is on it

All of it under PS3_GAME. Proven · all 1,124 files

Where	Files	What
USRDIR/EBOOT.BIN	1	the executable, an SCE SELF of 24,250,576 bytes; decrypted it is a 64-bit big-endian PowerPC ELF
USRDIR/SCRIPTS.SDAT	1	the compiled Lua scripts, an NPD-wrapped PAK
the 336 PAKs	336	levels, levels/layers, characters, anim, flash, database and the root of USRDIR
USRDIR/database	27	SQLite 3 databases (MAIN.DB holds levels, sessions and surfaces)
USRDIR/physics	8	Havok .HKX files
USRDIR/audio	288	Wwise banks (70 .BNK), packages (70 .PCK) and 147 .OGG files, and others
USRDIR/videos/bik	451	Bink videos, 2.95 GB
PS3_UPDATE/PS3UPDAT.PUP	1	the console firmware update, 268 MB

All counts are over the file listing of the disc. Proven · all 1,124 files That the 8 .HKX are Havok packfiles and the 27 databases SQLite 3 was checked on each. Observed

The executable and the scripts are encrypted on the disc. RPCS3 decrypts both without any key of ours; the decrypted executable is an ELF with eight program headers whose entry point is a function descriptor. Observed

Two name trees

The disc has two directory trees over the same sectors. The ISO 9660 primary tree holds upper-case names; the Joliet tree holds the names the game itself uses, with lower case and punctuation that ISO 9660 cannot hold. Each file has the same first sector and the same size in both trees. Proven · all 1,124 files

Names in the two trees	Files
identical	11
differ only in letter case (primary upper case, Joliet lower case)	1,112
differ in case and in one character (_ against -)	1

The one file of the last kind is the video 187_FORWARDFLIP_IMPOSSIBLE.BIK in the primary tree and 187_forwardflip-impossible.bik in Joliet. Proven · all 1,124 files The directory names differ in the same way (USRDIR/AUDIO against USRDIR/audio). Observed

The game asks the file system for the Joliet spelling, for example database/ui_frontend_en.db, and a case-sensitive host (the RPCS3 emulator compares names exactly) finds nothing under the primary spelling. Observed A reader that extracts the disc from its primary tree therefore has to rename every file to its Joliet name, matching files by first sector. Observed

Inside the PAKs the names are a separate scheme: lower-case paths with backslashes, hashed (Names and hashes).