One thing I forgot to mention in my last post about SCSI disk mode... One persons setup may not require termination on the end of the SCSI chain while another setup might, even with the exact same computers. This can be due to the length of the SCSI cable connecting the two (or more) devices. Termination is for the purpose of putting an effective load on the end of the chain. Otherwise the signal in the cable can bounce from one end to the other and interfere with itself. But, if the cable is short enough this may be little problem. Also if it's physical length is a particular multiple/fraction of the wavelength of the signal in the line then there may be no need for termination.
To put it another way, you may get by without terminating both ends of a SCSI chain if cable lengths are just so, but it should always work to terminate both ends. One problem that may seem to override this statement comes when devices in the middle of the chain are unknowingly terminated. In this case, impedances again become mismatched due to termination in more places than just the two ends (source and load). Also, it can work to terminate one end, and also somewhere in the middle of the chain instead of the other end. But, this is only possible because the cable lengths are arranged just right. Almost impossible to calculate but trial and error my give workable results. Greg __________________________________________________ Do you Yahoo!? U2 on LAUNCH - Exclusive greatest hits videos http://launch.yahoo.com/u2 -- PowerBooks is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> PowerBooks list info: <http://lowendmac.com/lists/powerbooks.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:powerbooks@;mail.maclaunch.com> To unsubscribe, email: <mailto:powerbooks-off@;mail.maclaunch.com> For digest mode, email: <mailto:powerbooks-digest@;mail.maclaunch.com> Subscription questions: <mailto:listmom@;lowendmac.com> Archive: <http://www.mail-archive.com/powerbooks%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
