Last week I got a new Sony DVD drive which came with Nero software. Using Nero Backitup to back up MS Word files from my hard drive, I could successfully burn a single file or a small folder say about ten files, but whenever I tried to burn something bigger, I would get
Burn Process Failed at 4 x (5,540 KB/S)
Back up Process Failed.
Looking at the Nero website I have isolated the cause of this problem: In Device Manager, when the Secondary IDE Channel Transfer Mode is set to ‘DMA if avaliable’, the burning process is always (except for very small projects) interrupted by ‘Communication Failure’. When the Transfer Mode is set to ‘PIO only’, the burning process works ok.
Can anyone explain what DMA / PIO mean and why this happens.
(CPU AMD Athlon XP2400+ (2Ghz); RAM 512MB; HD Maxtor 80MB)