This issue has been bugging me for a couple of days so I’m looking for some expert help. I’ll put it all down so that all the info is up front so sorry for the lengthy description…
I have been burning discs for a while now with my Optiarc AD-5170A without problems. I usually burn at 4x anyway, usually using ImgBurn or CloneDVD 2, but sometimes find higher speeds cause miscompare errors when verifying the burn - I had just put this down to the poor media I use (well, it’s cheap and I never really have problems playing the results in my DVD player!).
Anyway I recently bought a CPU on eBay, got some old server RAM from someone and bought a new hard drive to up my system performance and I’ve been trying to tweak the PC to get the best out of it (spec in my sig) - which led me to look at the transfer modes of my drives in Device Manager. Now, the chipset on my mobo is a VIA KT266A and should be capable of UDMA Mode 5/ATA100. However, to my surprise the Optiarc is running on Multi-word DMA Mode 2! Furthermore the HDD, which is capable of ATA133 is running in UDMA Mode 4/ATA66! And so to my first question…
1. Should I care? Will this transfer mode limit the speed at which I can burn discs? What are the advantages of running it in UDMA Mode X and what UDMA Mode should it run at?
The DVD issue is one thing however obviously I want to get the best out of my hard drive so I rooted around here and elsewhere and did a few things to try to enable higher transfer modes without any success.
[li]Uninstalled the VIA Bus Master IDE Controller - rebooted[/li][li]Uninstalled the ASPI layer using ForceASPI - rebooted[/li][li]Played around with the BIOS settings - not many options really[/li][li]Changed the cables around (HDD to secondary master, DVD to primary master)[/li][li]Ran the Hitachi disc utility to check that UDMA 5 is enabled on the HDD - it is![/li][li]Installed a new 80 cable IDE connector for the DVD[/li][li]Ran resetdma.vbs - message advised “No resettable ATA channels with Windows drivers found”[/li][li]Set each drive to “PIO Only” mode - rebooted. Reset them to “DMA if available” - rebooted.[/ul]Incidentally my BIOS is flashed to the latest version. My next course of action may be to flash the drive but I don’t want to if I don’t have to and I can’t see how that would help. Alternatively are there any reg hacks to try? I’m a bit perplexed to say the least, so to my second question…[/li]
2. Have I missed anything obvious or, better still, have I missed anything really obscure???
All suggestions welcome.