Date: Wed, 7 Oct 1998 20:12:01 +0200 From: Christoph Kukulies <kuku@gilberto.physik.RWTH-Aachen.DE> To: Adrian Filipi-Martin <adrian@ubergeeks.com>, James Mansion <james@westongold.com> Cc: Steve Passe <smp@csn.net>, vanmaren@fast.cs.utah.edu, freebsd-smp@FreeBSD.ORG, kuku@gilberto.physik.RWTH-Aachen.DE Subject: Re: hw platform Q - what's a good smp choice these days? Message-ID: <19981007201201.A795@gil.physik.rwth-aachen.de> In-Reply-To: <Pine.BSF.3.96.981007094419.4604A-100000@lorax.ubergeeks.com>; from ADRIAN Filipi-Martin on Wed, Oct 07, 1998 at 09:51:19AM -0400 References: <32BABEF63EAED111B2C5204C4F4F502017F7@WGP01> <Pine.BSF.3.96.981007094419.4604A-100000@lorax.ubergeeks.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, Oct 07, 1998 at 09:51:19AM -0400, ADRIAN Filipi-Martin wrote: > On Mon, 5 Oct 1998, James Mansion wrote: > > > Its all very well, but SCSI disks are a LOT more expensive than IDE > > ones. > > > > Might be faster IO per drive with SCSI, but I'd rather have twice the > > capacity and spend the remainder on more RAM. > > > > James > > Well, IDE tends to use significantly more CPU for IO than SCSI. > Isn't that what does all the DMA work for IDE? If you have cycles to As far as I understand, using Ultra DMA (IDE DMA) doesn't burn cycles since it works like bus master DMA and FreeBSD supports it, doesn't it? > burn, why pay for an SMP configuration? I wouldn't recommend IDE on > anything but a single user machine, because of the synchronous access to > the drives. (Has the sycnhronous drive access been dropped from EIDE? I > don't follow IDE developments much.) > > Adrian > -- > [ adrian@ubergeeks.com -- Ubergeeks Consulting -- http://www.ubergeeks.com/ ] -- --Chris Christoph P. U. Kukulies kuku@gil.physik.rwth-aachen.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?19981007201201.A795>