Clark Martin wrote: > > At 10:33 PM -0400 5/11/05, DaveP wrote: > >In all my limited SCSI experience I've found it is the last Physical > >device on the cable that needs terminated... Shouldn't matter if the > >farthest one from the bus is device 1 or 7, if it's on the end, it gets > >terminated. And that doesn't mean the last plug on the cable, it means > >the last USED plug on the cable. If I'm off-base, please feel free to > >correct me. My SCSI is pretty limited. > > It's the cable you are terminating, not the drives. It's basic > transmission line theory. If the end of a transmission line (SCSI, > Ethernet, LocalTalk, etc) isn't terminated with a resistance equal to > the lines characteristic impedance there will be a reflection of the > signal. This reflection can interfere with the true signal causing > an error.
Unclear. Do you mean *terminate the cable*, but *not the drives*? In the ext. SCSI chain, the last *device* also has to terminated, doesn't it, or will a terminator block/plug take care of all the termination needed? If a case which holds a device has no terminator socket, > termin. device. The internal HDD, if lowest ID, needs it's own termination, of course. -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[email protected]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/pci-powermacs%40mail.maclaunch.com/> iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
