hdparm help

Forum Linux/Free BSD : Linux/Free BSD General Discussion - hdparm help

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I need help with hdparm. basicly my problem is that i do not know what command to use to set the UDMA transfer to UDMA66
I use 2 WD 20 gig expert drives. And a Abit kt7
Anyone that can help with this specific question please let me know. I have read the Howto but it does not mention anything about UDMA66 only 33

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I use in lilo.conf an append line :
apend="reboot=warm ide0=dma ide1=dma"
Think DMA will be default with 2.4. With 2.2 it tells the IDE driver to set DMA, it doesn't use multi-sector transfers though.

To use hdparm, try 'hdparm -d 1 -m 8'. You might also like to turn on 32 bit commands (perhaps -c cannot remember).
Anyway benchmarking with hdparm -t and -T showed that the append line is 90% of everything, perhaps multi-sector transfers reduce interrupts, but it doesn't seem to speed transfers on any of the mobo's I've tried.

Reply to Anonymous

I suggest you go over to www.linuxnewbie.org. you will find the hdparm hack info as well as many other tips in the newbie help files

-plasmid

Skydive...because life is too short to waste on the ground.

Reply to Anonymous

Maybe i was not specific enough in my first post about my problem. First of all i have READ ALL THE HOW-To's on hdparm. I have also used my same drives with it enabled on my previuos motherboard. What i am having trouble with is the Via controler. My old controler was a Promise U66 that came with my Bxmaster MB. My current MB is the KT7 and noticed that i am not getting the full benefit of my drive.
by doing a hdparm -Tt i can see that the tranfer rate is lower then what is was with the promise controler. I have done hdparm -i and noticed that the controler is set to UDMA2 mode.

When i try to force it any higher my drives start to output trash to my tty's

Anyway if you have had a similar prob and have solved it in anywa please let me know

Thanks

Rop

Reply to Rop
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