Date: Fri, 26 May 2000 18:28:41 -0400 From: Doug Ledford <dledford@redhat.com> To: crawford@goingware.com Cc: aic7xxx@FreeBSD.ORG Subject: Re: 64-bit PCI with SCSI? Message-ID: <392EFA99.93846F49@redhat.com> References: <959095688_PM_BeOS.crawford@goingware.com>
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"Michael D. Crawford" wrote: > > Hi, > > I see from the README in the latest development kernel sources (linux) > that the aic7xxx driver supports the Adaptec 39160 card. > > This is a 64-bit PCI Ultra-160 SCSI . > > I'm about to build a server and want it to go real zippy and stuff. If > I get one of these cards and put it in a 64 bit slot, will Linux use the > 64-bit PCI bus? Is this something that's perhaps handled transparently > by the PCI bridge or does it require a kernel version with 64 bit PCI > enabled? > > Or perhaps will the 64 bit card work at the same speed as a 32 bit card > even though it is in a 64 bit slot? > > They have cheaper Ultra-160 cards that go into 32 bit slots. > > BTW - I'm new to the list and sorry to be bugging you with such > questions. I have a little knowledge of SCSI programming (mostly > writing scanner drivers) and hope I can contribute something more > substantive later. > > Regards, > > Mike Crawford > crawford@goingware.com > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe aic7xxx" in the body of the message The driver uses the 64 bit transfer path (it's not entirely transparent to the driver, in that the driver can turn off the 64 bit transfers, but why would it?) -- Doug Ledford <dledford@redhat.com> http://people.redhat.com/dledford Please check my web site for aic7xxx updates/answers before e-mailing me about problems To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe aic7xxx" in the body of the message
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