--- Phil Beesley <[EMAIL PROTECTED]> wrote: <clip> > be used internally and that auto motor start is ON
I knew there was something I forgot in my other reply to this. Macintosh computers do not send a "start unit" command on the SCSI bus. What also does not work is an Autostart Delay. What that does is wait the number of seconds equal to the SCSI ID number to power up the drive spindle motor. So ID #6 would wait six seconds after turning on the Mac before that drive would spin up. Not good when the Mac is expecting all SCSI devices to be ready to go when it goes looking for what's on the bus! > In theory there should not be any problems if > more than one device in the chain has terminator > power enabled. All devices on the bus can be set to provide termination power to themselves, if that does not also enable termination on the device. What you do not want is any more than two devices supplying termination power to the BUS. For desktop Macs that's the Mac and one other device, usually the one at the end of the external SCSI chain. PowerBooks with SCSI do not supply termination power to the bus so when using external SCSI devices on a PowerBook, at least one must supply termination power to the bus. Hmmm, don't recall if the Mac Plus supplies termination power to the bus or not. ===== "When you are wrestling for possession of a sword, the man with the handle always wins." Hiro Protagonist __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com -- Vintage Macs 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> Vintage Macs list info: <http://lowendmac.com/lists/vintagemacs.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/vintage.macs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
