Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!unido!opal!tmpmbx!scuzzy!src From: src@scuzzy.in-berlin.de (Heiko Blume) Newsgroups: comp.periphs.scsi Subject: Re: SCSI max length Message-ID: <1991Jan04.191812.16844@scuzzy.in-berlin.de> Date: 4 Jan 91 19:18:12 GMT References: <2167.AA2167@caleb> <37560@cup.portal.com> Organization: Contributed Software Lines: 28 ts@cup.portal.com (Tim W Smith) writes: >By being very careful to get good cables, and good termination, >and other magic things that I don't understand, you can get >something like *100* feet. in fact the maximum length depends on the kind of SCSI bus you use. "Single Ended" SCSI allows up to six meters, "Differential" SCSI allows up to 25 meters. you can use Single Ended to Differential adapters to achieve greater distance between your host adapter and the devices, if these are Single Ended. i.e. Host <-SingleEnded-> Adapter <-Differential-> Adapter <-Single-Ended-> Device(s) tho, i'm not sure about the max length with this, if the adapters don't have their own power supply. the optimum cables are: - 132 ohms imp. 50 cond. flat or 25 signal twisted pair cable for Single Ended - 122 ohms imp. 50 cond. or 25 signal twisted pair cable for Differential both should be shielded. the mileage with your Devices' SCSI implementation may vary, of course. -- Heiko Blume <-+-> src@scuzzy.in-berlin.de <-+-> (+49 30) 691 88 93 public source archive [HST V.42bis]: scuzzy Any ACU,f 38400 6919520 gin:--gin: nuucp sword: nuucp uucp scuzzy!/src/README /your/home