Date: Mon, 21 Oct 2002 07:54:32 -0700 From: "Kevin Oberman" <oberman@es.net> To: Mark Santcroos <marks@ripe.net> Cc: Randy Bush <randy@psg.com>, FreeBSD Laptoppers <freebsd-mobile@FreeBSD.ORG> Subject: Re: hard drive Message-ID: <20021021145432.CD5DD5D06@ptavv.es.net> In-Reply-To: Your message of "Mon, 21 Oct 2002 07:28:19 %2B0200." <20021021052818.GA554@laptop.6bone.nl>
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> Date: Mon, 21 Oct 2002 07:28:19 +0200 > From: Mark Santcroos <marks@ripe.net> > Sender: owner-freebsd-mobile@FreeBSD.ORG > > On Sun, Oct 20, 2002 at 12:26:25PM -0700, Randy Bush wrote: > > for me, the bottleneck on laptops is the disk throughput. the hard > > drives themselves are slow, and the bandwidth to them sucks. for > > big makes etc., a 10GHz cpu would not improve throughput as much as > > doubling the disk goodput. > > > > is anybody making laptoys with real disk i/o subsystems? > > Imho the gap between desktop and laptop is getting smaller. There are > quite some laptops shipping with UDMA100 now. > > "dd if=/dev/ad0 of=/dev/null bs=4096" gives me 22 MB/s. I don't have a > recent desktop so I don't know how this compares to recent desktop > performance but I don't think it is bad. > > This combined with a 1800Mhz PIV and 256MB DDR memory makes it do > buildworlds in 45 minutes. My IBM T30 has a 1800 MHZ P4 and UDMA100. I have 512 Mb DDR RAM and buildworld takes 33 minutes for Stable. It also has a higher resolution display than my desktop LCD panels. I'd say the gap may be narrowing, but a 4 processor Xeon with SCSI drives will still blow my laptop away. But it is much faster than my normal desktop, a 1000 MHZ PIII with 512 Mb RAM and UDMA133 disk controller. The laptop cost more than the desktop, as well. R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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