From owner-freebsd-current@FreeBSD.ORG  Wed Jan 31 06:25:16 2007
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Subject: Re: Interesting speed benchmarks 
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Ian FREISLICH writes:

>  > >  DUMP: finished in 12961 seconds, throughput 2095 KBytes/sec
>  
>  As a random datapoint that might or might not be related.  In the
>  last year or so I was pontificating about how much better SCSI
>  was that IDE/ATA to my boss.  I then did some benchmarks on my
>  (CURRENT) system and discovered that an old 10Gig 7.5krpm UDMA33
>  disk significantly out perform some Seagate Cheatah LVD 10krpm
>  disks.

	In supplemental testing (advised by Peter Jeremy) the disk has
been able to transfer(read) 25 mbytes/sec - sufficient to declare it
not the bottleneck.
	Additional testing will happen, but dump is by far the prime
suspect. 

>  Last time I looked, ahc(4) was still under GIANT.

	I noticed that.  Is there any sentiment for pulling it free?
And how much would that help?


				Robert Huff