Date: Sat, 13 Jul 1996 11:07:11 -0400 From: Gary Chrysler <tcg@ime.net> To: David Kelly <dkelly@hiwaay.net> Cc: rich@oester.com, hackers@FreeBSD.org, questions@FreeBSD.org Subject: Re: adaptec 154X support Message-ID: <31E7BB9F.6CAB@ime.net> References: <XFMail.960712213059.dkelly@hiwaay.net>
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David Kelly wrote: > > On 18:32:45 "G.R.Gircys" wrote: > > >have a fine ole dx2/66 board with adaptec 1542B (older style with > >jumpers) - worked flawlessly with bsdi for 2 years - now moving to > >freebsd and find that during 2.1 install (usually while copying floppy > >resident files) system either hangs or panics (virt screen 2 messages > >about scsi bus locked). > > > >so i try a newer card - 1542 C/CF series - works great. > > > >does freebsd support the older adaptec 154X A/B? in my caseseems the > >answer is no. > > Have you fiddled with bus timing on the Adaptec cards? > > Along the same lines I have a 486DX33 that has worked fairly well with > SCSI for several years. Until the first of the year. It started trashing > files that were not being written to. Tried BIOS settings. Tried the > Adaptec 1542CF settings. Tried another 1542CF, disk drives, UltraStor > 14F, even finally got desparate and tried MS-DOS. More or less the same > with everything, while everyting worked on other systems. > > Decided the MB was broken. Pulled the SCSI card and its current uptime > is about 75 days now. I hate PC's. Wish it would break good and proper > so I could put it out of my misery. That box really nees a P166 in it, > but then I might feel like the 640x480 256k VGA card would need to be > replaced... :-) > I don't know if this has anything to do with your alls troubles but maybe it'll be good info for somebody. I have several Adaptec 1542CF's, For each and every one of them I have had troubles with external drives. Never used one with internal drives, So don't know about that. The solution, Call Adaptec techsup they'll send ya a special external cable and the troubles dissapear! For FREE at that! I don't pretend to understand the internals of SCSI cabling, So I have no idea whats special about the cable, Just that it has solved my problem each time! I *belive* it has something to do with a tolarance range of something in the SCSI cable spec, It's -xx to +xx and the 1542 falls out of this range.. ?? Not really sure though. They did explain it to me ~4 years ago. I'm sure if those fried brain cells got tickled enough I would remember. When I bought my last 1542CF (less then a year ago) I did call and recieved yet another free cable. I wouldn't mind knowing/remembering. I'll posts whatever is written on the cables if anyone wants it. I more then likly have the paper work from them as well. My experances with this problem have _NOT_ been in FreeBSD, But other OS's/NOS's. MS-Dog and Netware to be exact! I do have a 1542CF in my FreeBSD 2.1r box running a 3501B SCSI CD and it works flawlessly. No SCSI HD's though.. (Yet) -Enjoy Gary ~~~~~~~~~~~~~~~~ Improve America's Knowledge... Share yours The Borg... Where minds meet (207) 929-3848
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