Date: Wed, 20 May 1998 13:06:18 -0500 (CDT) From: Jim Bryant <jbryant@unix.tfs.net> To: beattie@aracnet.com (Brian Beattie) Cc: freebsd-current@FreeBSD.ORG Subject: Re: Help - please... Adaptec 1542 and Exabyte tape problem... Message-ID: <199805201806.NAA10019@unix.tfs.net> In-Reply-To: <Pine.LNX.3.96.980416094305.4146A-100000@shell2.aracnet.com> from Brian Beattie at "Apr 16, 98 09:45:20 am"
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In reply: > On Wed, 15 Apr 1998, Tom wrote: > > > > > On Thu, 16 Apr 1998, Kerry Morse wrote: > > > > > Apr 16 13:35:05 proxy /kernel: aha0: DMA beyond end Of ISA: 0x357cd10 > > > > Bounce buffers are required to DMA above the 16MB for ISA devices. > > However, bounce buffers do not work for the aha driver (it is unclear > > whether the driver or the bounce buffers are broken). > > > > This is any old problem. See the archives. It seems that any developer > > who has more than 16MB of RAM has also decided to upgrade to non-ISA > > controllers. > > > > I am planning to implement the aha1542 controller under the new CAM > interface. I have more than 16MB and plan to ensure bounce buffers work. crap.. i just sold my 1542cf for this very reason... i was wanting it to handle low-bandwidth stuff like the CD-ROM, M-O drive, and DDS-2 tape drive, but I kept getting the above messages... now i've got a heck of a lot of stuff hanging off my 2940UW... i of course have 'OPTION BOUNCE_BUFFERS' in my config... jim -- All opinions expressed are mine, if you | "I will not be pushed, stamped, think otherwise, then go jump into turbid | briefed, debriefed, indexed, or radioactive waters and yell WAHOO !!! | numbered!" - #1, "The Prisoner" ------------------------------------------------------------------------------ Inet: jbryant@tfs.net AX.25: kc5vdj@wv0t.#neks.ks.usa.noam grid: EM28pw voice: KC5VDJ - 6 & 2 Meters AM/FM/SSB, 70cm FM. http://www.tfs.net/~jbryant ------------------------------------------------------------------------------ HF/6M/2M: IC-706-MkII, 2M: HTX-212, 2M: HTX-202, 70cm: HTX-404, Packet: KPC-3+ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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