plexwriter 161040a in pio mode 4?

[DANNY61902]

i just noticed today that, on boot, my computer recognizes my plextor plexwriter 16/10/40a as a mode 4 drive. i know dma is enabled on both devices on each channel (using the two onboard ide channels), and all 3 of the other devices (pioneer dvd-106s, ibm deskstar 60gb 60gxp, seagate barracuda ata ii 100) are listed as running in ultra dma mode in the device manager. the plexwriter is listed in the device manager as running in dma mode, but not ultra dma mode. however, in the bios, it is recognized as a "mode 4" drive. (i believe this to be pio mode 4.. am i correct?)
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win2k sp2
asus a7m266
via 4-in-1 4.32v
512mb crucial pc2100 @222
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any help would be greatly appreciated.. thanks

 

[shathal]

First off, DMA has nothing to do with PIO or ATA - it's just "Direct Memory Access", and doesn't get into this debate.

What the BIOS detects the drive as counts - I'll assume that "mode 4" should indeed be PIO 4, as UATA mode 4 is ATA/66.

Check for a firmware update & check if you are detecting the drive "AUTO" in the BIOS - that may help you.

 

[seind]

Maybe this will confuse you even more

 

[DJFuji]

hey i'm the guy who put out the post that the last guy linked to. I'm having the same problem with both a TDK drive AND a plex. And the TDK is NOT a rebadged plex. It's the ricoh type drive. Apparently there is still enough similiarities to warrant the same problems, however. The jumper trick *seems* to work, but im not sure if its actually DOING anything other than changing the detect type. The strange thing is that the theoretical transfer rate (burst) on my two drives matches PIO4 and NOT UDMA33/66/100. It's like they intentionally made the drive PIO4. Why, I have no clue