[openbeosstorage] Volume Sets

Howdy,

Lest things quiet down too much around here, I thought I'd let you 
know what I discovered about volume sets.

Firstly, none of the multi-CD sets I looked at (MS VS.net, MS VS 6.0, 
MS Office 2002, Riven, Myst) were true volume sets a la the 
standards. In the case of Microsoft's CDs, they *did* set the volume 
set identifiers on each CD, but to unique values that matched the 
corresponding regular volume identifiers (i.e. MSVSNET1, MSVSNET2, 
...). The latter two sets mentioned didn't even bother setting the 
volume set identifiers.

So, I guess there's no need for us to worry about supporting true 
volume sets, as it would appear that no one else does either. Perhaps 
someday we might want to look into it...

Lastly, as to multiple volumes on a multisession CD, I discovered an 
interesting bit in the UDF specs that specifically states that only 
the volume in the "first recorded track of the last existent session" 
shall be presented. It also notes that these are the same semantics 
as those used by iso9660.

So, it sounds to me like we ought to present only the last iso9660 
and/or UDF volume on a multi-session CD by default, but make any 
others available (since I think that's a very handy feature to have). 
 I don't know that this is anything we need to offer in the Disk 
Device API though; Tracker could just figure things out on a device 
by device basis. Also, in the case of other filesystems (like the R5 
CD with a BFS image), I think we should just present them all like is 
currently done.

-Tyler

Other related posts: