Forum: UltraISO
Topic: Re-order files within an ISO?
started by: tim
Posted by tim on Nov. 07 2004,15:55
Is it possible to re-arrange somehow the order that files are placed within an ISO image (and hence on the final burnt CD/DVD).

Reason being is that I would like the smallest files first (inner most part) and the largest files last (outer most part).
Basically sorted on size.

Why do I wanna do that?
Large files will benefit from the higher read speed at the outer edge (with CAV).
Small files will get less seek overhead if they are close to the directory structure on the inner part (I think).

Possible?
Posted by xoben on Nov. 07 2004,22:31
It is possible. Are you sure this can increase CD performance?
Posted by tim on Nov. 08 2004,04:15
No.

It's just an idea I would like to try out.

So how would it be done?

Posted by xoben on Nov. 08 2004,09:03
Need to do some coding ...
Posted by tim on Nov. 08 2004,11:42
Ah well, you didn't have much going on anyway  :;):

:cool:
Posted by midas on Nov. 21 2004,18:51
if you have ever seen Microsoft' CDImage program, it has the ability to write the I386 directory on reverse sort order, which if you are making Windows install CD's, it can help speed up the file copy process greatly.
definitely would be a welcome feature :)
Posted by tim on Nov. 23 2004,11:53
midas : What's the option to do the I386 re-ordering?

xoben : How's it going?
Posted by tim on Dec. 17 2004,09:53
xoben : have you forgoten about this?
Posted by xoben on Dec. 17 2004,10:05
Hi tim, it is still in the 'Pending Features List' to be included in future versions someday.
Posted by midas on Dec. 26 2004,00:42
-y5
write \i386 directory files first, in reverse sort order
Posted by tim on Dec. 27 2004,10:36
Thanks for that.

What's the latest version of CDImage and where would I get it?

This is only usefull for a Windows OS CD and nothing else but i'll try it to see what happens.