Date: Wed, 2 Aug 2000 11:47:19 -0700 (PDT) From: Matthew Jacob <mjacob@feral.com> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: dual channel U160 adapters Message-ID: <Pine.BSF.4.05.10008021147110.31711-100000@semuta.feral.com> In-Reply-To: <14728.26123.830234.107666@grasshopper.cs.duke.edu>
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QLogic 12160. On Wed, 2 Aug 2000, Andrew Gallatin wrote: > > We're looking for a good dual-channel U160 adapter to plug into a > motherboard with multiple 64-bit/66MHz slots and enough I/O > bandwidth to comfortably handle over 320MB/sec of DMA transfers. > (we've measured over 450MB/sec). > > Is there anything else out there other than the Tekram DC-390U3D and > the Adaptec 39160 which is generally available? > > Neither of these look ideal because it doesn't look like either one > has enough PCI bandwidth available to be able to run both channels > flat out at the same time. Adaptec's site says the 39160 is 64-bit > but not 66MHz, so it will be limited to 256MB/sec. Tekram claims that > the DC-390U3D is 64-bit/66MHz, but then says its limited to > 266MB/sec.. > > Would we be better off with 2 Adaptec 29160's on different PCI busses? > > Thanks, > > Drew > > ------------------------------------------------------------------------------ > Andrew Gallatin, Sr Systems Programmer http://www.cs.duke.edu/~gallatin > Duke University Email: gallatin@cs.duke.edu > Department of Computer Science Phone: (919) 660-6590 > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-scsi" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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