Date: Fri, 22 Mar 1996 17:58:06 -0500 (EST) From: "Stephen F. Combs" <combssf@salem.ge.com> To: Nate Williams <nate@sri.MT.net> Cc: Terry Lambert <terry@lambert.org>, hackers@freebsd.org Subject: Re: Crash advice needed (long) APPENDIX A Message-ID: <Pine.SUN.3.92.960322175703.7194B-100000@combs.salem.ge.com> In-Reply-To: <199603222151.OAA20160@rocky.sri.MT.net>
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Sorry Guys, I started with a 1542A (circa 1989) with internal AND external devices. I'm useing a CF now, but I've used 1542A's, 1542B's, AND 1542CF's. ---- Stephen F. Combs Internet: CombsSF@Salem.GE.COM GE DS&TC Voice: 540.387.8828 Network Services Home: CombsSF-Home@Salem.GE.COM 1501 Roanoke Blvd FAX: 540.387.7106 Salem, VA 24153 On Fri, 22 Mar 1996, Nate Williams wrote: > Date: Fri, 22 Mar 1996 14:51:02 -0700 > From: Nate Williams <nate@sri.MT.net> > To: Terry Lambert <terry@lambert.org> > Cc: hackers@freebsd.org > Subject: Re: Crash advice needed (long) APPENDIX A > > > > Apart from the fact that 20' is too long (3m max for fast-SCSI, 1542C is > > > a Fast capable controller that will try to use 10Mbytes/sec with a Fast > > > device) Adaptecs tend to work better if the controller is at the end of > > > the SCSI bus. So, either use the internal or external connector but not > > > both at the same time > > > > Using both busses is not a problem for the CF; the C and prior can > > only successfully use the internal or the external unless there is > > a modification (invloving a capacitor and a resistor soldered on near > > the external connector). > > Bzzt. Thanks for playing, but no dice. I've run my 1542B (which was > *very* much prior to the C model) with internal/external devices since a > month after I got it. I updated to the most recent BIOS revsion before > I did that, but I've had no problems that have been due to my board. > It's worked flawlessly running SCSI-I and SCSI-II disks, tapes, and CD's > externally. (Though I haven't yet stuck a scanner on it. That'll be > the next project. :) > > Termination seems to be less critical on older SCSI devices, as I ran > with the adapter terminated, external devices, and with both my internal > drives terminated until I got my new disk a year and a half ago. Now I > have to run everything properly terminated, and have added an external > 4MM DAT w/out problems. > > I'm running a mixture of SCSI-I and SCSI-II peripherals if that makes > any difference. > > Termination <-> External S2-DAT <-> 1542B <-> Quantum 1.8G S2 \ > <-> Quantum 40MB S1 <-> Tanberg 150 S1/S2(?) <-> NEC 3X CD <-> > Termination > > My Tandberg claims to be a SCSI-II device, but I don't think it is. > > > > Nate >
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