On Wed, Mar 07, 2001 at 11:58:37AM +0100, Zdenek Kabelac wrote:
> On Wed, Mar 07, 2001 at 05:52:21AM -0500, William Park wrote:
> > I hear some people are getting around 100Mb/s disk transfer rate.
> > Can this be true? If so, how is it done?
> >
> > At the moment, with my 2.2.18 kernel,
> > hdparm -m16 -d1 -t -T /dev/hda
> > reports around 30Mb/s with or without Andre Hedrick's ATA-66-100 patch.
> > The key option here is DMA (-d1).
>
> Well - if you are getting speed above 22MB/s you are definitely using
> Andre's code for UDMA4 - the only problem is if you are stressing
> your computer to hard you will get deadlock sooner or later -
> for bp6 the safe mode seems to be UDMA3 - around 24MB/s (-X67)
> (-X68 is UDMA4 - the mode you are using)
> (For 2.4 kernels the default mode for IBM drives is now UDMA3)
I swear... If DMA is enabled, I get the same number with standard 2.2.18
kernel.
---William Park, Open Geometry Consulting, Linux/Python, 8 CPUs.
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