> On Thu, Oct 07, 1999 at 09:59:54AM -0400, Eric Kasten wrote:
>
> > A thought on multi-session cds. I've been considering using CD-Writers
> > as a way to create snapshots of certain types of critical data by
> > writing a new track to the CD periodically (essentially creating a set
> > of generation datasets on the CD). One of the down sides of this
> > is that there isn't a particularily easy way (that I've located) to access
> > the data tracks beyond track 01 -- ie, mount mounts track 01, but there
> > isn't a way to mount a different track that also has an isofs on it.
>
> isofs in 2.3.x (for suitable values of x, certainly >=15) has a
> session= parameter that you should be able to pass in via mount.
>
> What would be even more interesting is for cdrom block devices to make
> multiple sessions appear as partitions -- assuming people don't ever put
> _real_ partition tables on CD-ROMs, of course.
I once used a multisession CD-ROM (don't recall the brand) whose authoring
software and device driver allowed for incremental backups. The driver
would present the multisession CD-ROM as one filesystem where you only saw
the most recent version of a given file. It was pretty slick.
- Greg
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