logic problems, disk too slow Options

[gemmar]

Hi,

have a problem concerning disk speed using logic audio 4.7 Platinum. With audio track number 10-15, depending on particular Track, my powerbook (titanium 400) comes up with disk too slow error. Can someone explain this to me, i thought, running 12 little audio tracks of 2 to 8 bars length shouldn't result in any problems (o.k., there are some compressors, reverbs and delays running in parallel, but this shouldn't matter to the harddrive, or what?), anyhow, why is such a small amount of data not kept in the RAM anyway? I just have 256 MB, would it help to put in more to improve the situation, or do i have to play around with some parameters inside Logic, which?

any help appreciated

gma

[geedoubleyou]

The audio software that I use (Cubase, DP3) recommends a disk cache( memory control panel) setting of 256k or 512K.

The idea being that by caching smaller chunks of data, data will always be available at the processor.

A large disk cache will cause cpu overloads, because the CPU will constanly send out fetch data commands, while waiting for the default OS9 cache of 8Gb to fill up.

Disk to slow errors can also result from a fragmented hard drive.