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secondary channel hd only using DMA mode 2?

B

bigpoppapumpg

Member
ide 0 master is my western digital 160 gb hd. ide 1 master is cd rom, ide 2 slave is maxtor 80 gb 7200 rpm hd. the WD is using ultra dma mode 5, but the maxtor(and the cd-rom) are stuck at ultra dma mode 2.

why wont the maxtor run at dma mode 5?
 
If the hard drive is slave to the cdrom that's probably the the problem.
I think it would be faster to go with:
IDE Channel 0:
HD 1, master; HD 2, slave;
IDE Channel 1:
CDROM, master; empty;
 
Just guessing, since you didn't mention, but I would say that your using a 40-pin cable for your IDE 1 devices, try a 80-pin cable.
 
Originally posted by: Pistolero
If the hard drive is slave to the cdrom that's probably the the problem.
I think it would be faster to go with:
IDE Channel 0:
HD 1, master; HD 2, slave;
IDE Channel 1:
CDROM, master; empty;
Click to expand...


the reason i didnt do it that way is that I anticpate doing alot of copying from hd to hd... figured it would be much faster if they weren't sharing the same channel. as for the cable, i'm using a ultra133 cable which came with that maxtor hd... don't think it's the cable that's forcing the dam mode 2... if anything it must be that its slave to a cdrom. still there should be a way to run a 2nd hd on ide 1 using dma mode 5!
 
"i'm using a ultra133 cable which came with that maxtor hd... don't think it's the cable that's forcing the dam mode 2" if you were using a 40-pin cable it would, but your not so, try removing your cd-rom and see if that changes anything, You should be able to run both devices on same cable, cd-rom will not drop hd to dma 2.
if you remove cd-rom and it still shows as in mode 2, then it's either your cable, or possibly a bios setting, thats preventing you from runnin dma 5.
or flip-flop master/slave settings on cd-rom/hard drive.
 
- Check the cable is a 80 pin one, a 40 pin cable will only work at UDMA 2.

- While youre doing the above, put the harddisk as master and cdrom as slave. As a general rule, always put fastest drive first on a channel.

- If the above doesnt show it sorted, go to Device Manager > IDE/ATAPI Devices > hghlight Secondary IDE Channel and press Delete. Dont worry it will reappear on reboot, and select the fastest speeds it detects possible.

If after a while it resets to UDMA 2 again, its probably because it's detecting too many errors, though only recall seeing this happening on CD drives, so possibly this doesnt happen for harddrives? Anyway, in this case try a new cable, and route it away from anything that might give interference. If it goes to UDMA 2 immediately, then 😕

 
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