Date: Thu, 22 Aug 1996 19:40:24 -0700 From: "Justin T. Gibbs" <gibbs@freefall.freebsd.org> To: Torbjorn Granlund <tege@matematik.su.se> Cc: scsi@freebsd.org Subject: Re: Adaptec 2940UW sync at low rates Message-ID: <199608230240.TAA22206@freefall.freebsd.org> In-Reply-To: Your message of "Fri, 23 Aug 1996 00:37:06 %2B0200." <199608222237.AAA15687@insanus.matematik.su.se>
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>When the 2940UW is set in "Ultra mode", it refuses to talk at lower than 10 >MB/s to any devices. Unfortunately, I have a Toshiba 6.7x CD-ROM drive, and >a HP DAT drive that max out at 4.4 MB/s and 5.0 MB/s respectively. FreeBSD >warns about these devices, but to my surprise, at least the CD-ROM seems to >work great! (I haven't tried the DAT drive yet.) You are using an old version of the driver. Current versions of the driver support the full range of speeds when ultra is enabled. >My first stupid question is: Can I ignore this problem, or will it cause >serious problems with the devices that I simply haven't run into yet? Upgrade and the problem will go away. >My second stupid question is: Can an ASUS SC200 coexist with an 2940UW? >Which one's boot ROM will win...? :-) (The boot ROM for the SC200 is on the >ASUS motherboard.) They should co-exist fine. Simply disable the bios for the controller you don't want to boot from. >My third stupid question is: If one uses several similar SCSI controllers >(say an 2940UW and a plain 2940), which one will be ahc0 and which one will >be ahc1? Depends on slot position and how your BIOS does the probing. >Torbjorn -- Justin T. Gibbs =========================================== FreeBSD: Turning PCs into workstations ===========================================
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