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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!nntp.coast.net!chi-news.cic.net!ddsw1!news.mcs.net!news.uoregon.edu!symiserver2.symantec.com!usenet From: tedm@agora.rdrop.com Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: BOUNCE BUFFERS AND BUSLOGIC ISA CONTROLLER Date: 14 Sep 1996 16:53:05 GMT Organization: Symantec Corporation Lines: 13 Message-ID: <51enth$t3q@symiserver2.symantec.com> References: <323735BE.41C67EA6@mindspring.com> Reply-To: tedm@agora.rdrop.com NNTP-Posting-Host: 198.6.34.1 X-Newsreader: IBM NewsReader/2 v1.2.5 In <323735BE.41C67EA6@mindspring.com>, Ron Bolin <rlb@mindspring.com> writes: >Every so often I get a system panic when writing to SCSI tape using >FreeBSD 2.1.5R. The system is an ISA 486/66d from AST with 32MB RAM. >The system has a new Buslogin 545C SCSI-II controller and an Archive >Viper 150/250 >SCSI QIC tape. There were a few comments in the buslogic device driver about that series of cards not being able to DMA on > 16MB machines. While I'm sure that this probably has been fixed by now, I'd try removing 16MB or ram from your machine and running the tape drive for a testing period of time to see of the panics stop.