LinuxQuestions.org - How to find out if DMA acceleration is on? or its status

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chickenjoy

06-14-2007 02:27 AM

How to find out if DMA acceleration is on? or its status

for Hard Drive and CD-writer?

TIA

bathory

06-14-2007 02:37 AM

Use something like:

Code:

hdparm -iv /dev/hdX

X being your drive letter.

Regards

chickenjoy

06-14-2007 03:04 AM

thanks, my cd-rom has "using_dma = 0 (off)" whilst my HD doesn't show it, does that mean my HD doesn't support DMA acceleration?

bathory

06-14-2007 04:51 AM

Make sure your drive(s) support dma and it's enabled in the bios. Also take a look at your bootloader config file (grub.conf or lilo.conf) to see if you have disable it from there.
You can try to set dma on using

Code:

hdparm -d1 -m1 /dev/hdX

(for the hard drive better do it in single user mode just to be sure).

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