From: Sean McGrath (sean at domain hdl.ie)
Date: Wed 19 May 1999 - 10:33:23 IST
Kenn Humborg wrote:
> Sean McGrath wrote:
> > [root at domain portia:/var/log]#hdparm -t /dev/hda
> > /dev/hda:
> > Timing buffered disk reads: 16 MB in 0.34 seconds =47.06 MB/sec
> > Anyone else seen this ? I can't do the same on another machine...
> > hda: QUANTUM FIREBALL_TM2110A, 2014MB w/76kB Cache, CHS=1023/64/63, DMA
> I've played with these settings on quite a few machines.
> It seems to be very disk/chipset dependent.
> You should also try hdparm -d 1 /dev/hda to turn on DMA
yes, the figures are a bit high. Vincent pointed that out and got me
thinking of pci bus speeds, and 47MB/sec is impossible.
The machine is a app/fileserver so the software buffering comes in.
The dma setting didn't change much.
> Note that these will reset to the original 0 settings if
> the ide driver resets the IDE bus, unless you do hdparm -k 1
> to keep settings across resets.
have done already.
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