Last June I bought the components to build a new PC. 2ea Lite-On SOHW-1673S's were included. They have operated very nicely and done their jobs with almost no coasters made until the last couple of weeks or so. Nero is my burning app. I'm still running the original JS02 firmware.
The master unit has carried most of the load and is now behaving oddly. The slave unit seems to be working per normal. When burning a disc now, the master drive's buffer is no longer staying consistantly in the high 90%'s. It bounces from as low as ~2% to the high 90%s. Plus, it verifies the burn at only 14 to 16X instead of starting in the low 20X's and increasing to the mid 40X's as it reads towards the end of the disc as it used to do and the other drive still does.
I've gone into the BIOS. Both drives have DMA and PIO set to 'Auto' giving PIO: 4 and DMA: Ultra DMA-4.
Nero says the master drive's DMA is off while the slave's is on. Going into the Device Mgr, the Primary IDE Channel/Properties/Advanced Settings/ Device 0 was set to 'PIO only'. I've changed it to 'DMA if available'. The Current Mode Window will not change from 'PIO Only' to 'DMA if Available', even after several reboots. It seems to be locked in the 'PIO Only' mode. I can't get it to change over to DMA. Device 1 was and is set as it should be.
There is little doubt in my mind this problem is the source of the trouble. At first I was suspicious that the drive was going bad. Now I'm beginning to think the problem is with WinXP. I'm open to any thoughts or suggestions on this.
Thx for any help in getting this worked out.