From owner-freebsd-hackers  Wed Jan 14 12:00:16 1998
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Subject: Re: Any good comparison of Linux/FreeBSD/NetBSD/OpenBSD/Hurd?
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> What are your flags on wdc0 and wdc1? Bit 0x2000 has to be set for each
> drive to enable DMA support on that drive. You flags should be something
> like 0xa0ffa0ff (which enables all the performance features, including DMA).

Thanks, that made a world of difference. I'm now getting basically the
same results from the raw device for the EIDE disk:

# dd if=/dev/rwd0 of=/dev/null count=5000 bs=32768
5000+0 records in
5000+0 records out
163840000 bytes transferred in 16.030623 secs (10220439 bytes/sec)

but vmstat now gives me 96% idle time instead of 57% or so. Nice!

Steinar Haug, Nethelp consulting, sthaug@nethelp.no