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- Path: amtrash.comlink.de!J_Plewka
- From: J_Plewka@Amtrash.comlink.de (Joern Plewka)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: A3000 SCSI questions
- Date: 19 Jan 96 19:29:47 +0100
- Message-ID: <w$$ErMD42DaCz4@j-plewka.amtrash.comlink.de>
- References: <4crkgh$ct6@bmerhc5e.bnr.ca> <dalec.0432@zorro.amitrix.com>
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- dalec@zorro.amitrix.com (Dale Currie) -> "Re: A3000 SCSI questions"
- (12.01.1996)
- > Hmmm, it's called "Black Magic"! ;-)
- >
- > Seriously, there are a several possibilities. First candidate would be the
- > quality of your cabling, particularly on the external drives. Using DB25
- > to C50 cables with less than the full 50 wires in them will often cause
- > problems, and can pick up external noise from adjacent power cables quite
- > easily. Also, keeping the length of the external bus as short as possible
- > helps.
- >
- > Next, some devices tend to be more sensitive to "noise" on the SCSI bus
- > than others, and changing their physical location on the chain can
- > sometimes eliminate a problem. An active terminator on the end of the
- > external chain can also help sometimes.
-
- I`m using A3000T-40 with 3m of external SCSI (Scanjet etc.).
- Sometimes all IDs are in use...most of them located externaly.
-
- The machine is active terminated on both sides...no problem if no
- cheap cable is used and internal 50pin connectors are not broken
- unvisible. Otherwise....big TROUBLE...
-
- An other way is to use an earlier revision of Syquest 3270...
- It`s the worst behaved component connected to my A3000T until now.
- Many time and many money/work to do our own terminators to get these
- drives work (only one/bus was possible)...then dataloss and now replaced
- to a toaster.
-
- Greetings Joern
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