Re: Disc File Layout

> That depends on the disc drive.  On PS2 no, the drive is CAV (constant
> angular velocity) so the outside edge has the fastest read rates, but

I believe it's switchable, as you need to set the stable/CLV mode for dual
layer discs. Although I've never actually opened one up to check. Placing
data near the outside then becomes preferable, as you have to seek shorter
distances, and...

> Seek times are the killer

This is the big one. To help with this I reccomend writing all your data
into a single packfile, which allows you to completely automate the
placement of data on the disk. So you can easily place copies of files that
are read together, next to each other. Below a certain physical distance,
the head actually tilts, rather than moves, which is significantly faster.
Plus this means you never suffer the OS sending the head all the way back
to the centre to read the TOC. >_<

There's a lot of good info in sce.dev.prog.cddvd on this issue.

Cheers,
Phil


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