>
> Scott Lurndal <slurn@xxxxxxxxxxx> writes:
> > While the /dev/raw stuff was included in the 2.2 sgi raw I/O
> > work, it wasn't tested nor used, rather we used the standard
> > unix raw device paradigm:
> >
> > so try this instead:
> >
> > # mknod /dev/rsdb1 c 8 17
> > # mknod /dev/rsdc1 c 8 33
>
> Hi Scott,
>
> Thanks for your suggestion. It did actually seem to work (aside
> from the "Device not configured" error message"; see below) But
> it took a really really long time to run -- more than 3 hours when
> I left last night. I'm thinking that perhaps the POSIX Asynchronous
> I/O patch might speed things up (http://oss.sgi.com/projects/kaio)???
No, dd.raw doesn't use async I/O.
However, if you increase the I/O size (128k or perhaps 256k instead
of 2048) you'll see much better performance.
scott
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