SCSI chains, quick question...

Vincent Trouilliez vincent.trouilliez at
Sat Mar 5 04:35:22 UTC 2005

Problem: I have got a SCSI scanner, and an internal SCSI CD writer. 
I got the scanner first, 9 months ago, it was working fine. 
Then I removed it. Then later I was a given a SCSI CD writer, which
worked fine.
But today, for the first time, I tried plugging both the CD writer and
scanner at the same time.  But at boot, the SCSI card (common Adaptec
2940 affair) times out when trying to detect the devices. CD writer
alone no problem, scanner alone no problem, but both at the same time,
times out, nothing detected ! :-/

I very vaguely (probably wrong), that when you have both internal AND
external devices, then the terminator must be placed on the external
peripheral ? Or did my brain invite this during some bad dream ?
So I tried that :

internal CD writer : ID 2
scanner : ID 3
terminator : on the scanner.



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