There's another thing i'd like to ask/point out about mkudffs... when formatted in Linux with UDF revision 1.5, a windows machine with ..... is not able to read the disc. I used the udf-verifier to compare the disc formatted with the windoze machine vs the Linux machine, and got this: windoze machine : ====> Encountered EntityID summary : count EntityID 3 Domain Entity Identifier Identifier : "*OSTA UDF Compliant" UDF revision : 1.50 Domain flags : #00 2 UDF Entity Identifier Identifier : "*UDF LV Info" UDF revision : 1.50 OS Class : #05 Windows 9x OS Identifier : #00 Windows 9x - Generic 2 UDF Entity Identifier Identifier : "*UDF Sparable Partition" UDF revision : 1.50 OS Class : #05 Windows 9x OS Identifier : #00 Windows 9x - Generic 2 UDF Entity Identifier Identifier : "*UDF Sparing Table" UDF revision : 1.50 OS Class : #05 Windows 9x OS Identifier : #00 Windows 9x - Generic 12 Implementation Entity Identifier Identifier : "*Veritas CPG file syste" OS Class : #05 Windows 9x OS Identifier : #00 Windows 9x - Generic 2 Application Entity Identifier Identifier : "*Veritas CPG file syste" Implementation Use : #05 #00 #00 #00 #00 #00 #00 #00 2 Application Entity Identifier Identifier : "+NSR02" Implementation Use : #50 #01 #05 #00 #00 #00 #00 #00 These EntityIDs are also shown above when read for the first time ====> Final verify status report Final UDF Revision range: 1.50 only File System info last valid block : 197951 block size : 2048 packet length : 16 nmb of sessions : 1 verify session : 1 session starts : 0 medium WR type : rewritable medium SE type : nonsequential Error count: 7 total occurrences: 14 Warning count: 1 total occurrences: 2 on the mkudffs formatted disc, i got this : ====> Encountered EntityID summary : count EntityID 2 Domain Entity Identifier Identifier : "*OSTA UDF Compliant" UDF revision : 1.50 Domain flags : #00 1 UDF Entity Identifier Identifier : "*UDF LV Info" UDF revision : 1.50 OS Class : #04 UNIX OS Identifier : #05 UNIX - Linux 1 UDF Entity Identifier Identifier : "*UDF Sparable Partition" UDF revision : 2.01 (illegal) OS Class : #04 UNIX OS Identifier : #05 UNIX - Linux Error: 1 error in this EntityID, UDF 2.1.5, 6.3, ECMA 1/7.4. 1 UDF Entity Identifier Identifier : "*UDF Sparing Table" UDF revision : 1.50 OS Class : #04 UNIX OS Identifier : #05 UNIX - Linux 10 Implementation Entity Identifier Identifier : "*Linux UDFFS" OS Class : #04 UNIX OS Identifier : #05 UNIX - Linux 1 Application Entity Identifier Identifier : "*Linux mkudffs" Implementation Use : #04 #05 #00 #00 #00 #00 #00 #00 1 Application Entity Identifier Identifier : "+NSR02" 1 error found in EntityID summary These EntityIDs are also shown above when read for the first time ====> Final verify status report Final UDF Revision range: 1.50 only File System info last valid block : 197951 block size : 2048 packet length : 32 nmb of sessions : 1 verify session : 1 session starts : 0 medium WR type : rewritable medium SE type : nonsequential Error count: 15 total occurrences: 81 Warning count: 0 total occurrences: 0 Note the UDF Entity Identifier on the mkudffs formatted disc... this doesn't seem right...? i specified the UDF revision to be 1.5! Is there something i'm missing out on, or did i actually spot a bug? :) gustavo