On Thu, 15 May 2003 netbsd@ns.purk.ee wrote:

> Disabled USB2 (ehci) and removed TV card.
> Another issue what i'm having is writting large file to another U160 disk is
> quite slow wit new ahc driver ( 25MB/sec ) Same hardware running FreeBSD (
> 35MB/sec).Compiled with various ahc options.Any hint?
>
> sd1 at scsibus0 target 0 lun 0: <QUANTUM, ATLAS10K3_18_WLS, 020W> disk fixed
> sd1: 17537 MB, 31022 cyl, 2 head, 578 sec, 512 bytes/sect x 35916548 sectors
> sd1: sync (12.50ns offset 127), 16-bit (160.000MB/s) transfers, tagged queueing
> sd2 at scsibus0 target 1 lun 0: <QUANTUM, ATLAS10K3_18_WLS, 020W> disk fixed
> sd2: 17537 MB, 31022 cyl, 2 head, 578 sec, 512 bytes/sect x 35916548 sectors
> sd2: sync (12.50ns offset 127), 16-bit (160.000MB/s) transfers, tagged queueing

	Is it filesystem related?
	How does 'dd if=/dev/rsd1a of=/dev/null bs=1m count=1000'
	compare between the two machines. If you have a swap partition
	you can swapctl -d it and test write performance :)


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		David/absolute          -- www.netbsd.org: No hype required --