Enabling DMA effecting avisynth

NicolasW · Messages: 575 Registration: 09.08.2001

is there any reason that enabling DMA on a hard drive would affect avisynth good or bad? xnakx

racecar · Messages: 646 Registration: 10.13.2001

It should definitely affect it for the good, especially if you are working with a large filesize source, like uncompressed or huffyuv video. Probably wouldn't help so much with mpeg sources, but it shouldn't ever hurt to have dma enabled for your drives.

ArcticSilverM3 · Messages: 398 Registration: 09.29.2002

You shouldn't ever be running HD's in PIO mode because access to PIO mode devices costs you a lot of cpu power (about 50-100%...) and in addition to that, the transfer rate will be limited to about 16MB/s in PIO mode 4. I guess everyone here using avisynth has DMA enabled for his IDE HD's, so you can be pretty sure there are no problems with it.

Stinky · Messages: 86 Registration: 10.03.2003

well when i enable DMA for the DVD drive rip speeds are increased substantially, But when i enable it for the hard drive(IBM DeskStar 40g) I have read errors and execption errors with Avisynth. Disable it on the HD and things are all well agian. I guess i should take a look at the other components (RAM, MB) thanks for the replies

johnb · Messages: 49 Registration: 01.31.2003

ok thanks for all the help