Ahh Yess... SCSI I, SCSI II, SCSI III, SE, DF, Wide, Narrow, Fast, Ultra, LVD/SE, HVD, Ultra160 and Ultra320...
I know I am forgetting a couple of others. For a living I support external storage, all I can say is THANK GOODNESS FOR FIBRE CHANNEL! A little trick that support showed me when dealing with LVD/SE external devices is; Use a SE Terminator on a LVD/SE device to force the bus to SE. And always use the proper active terminator. I prefer to use an external Terminator then internal terminators with jumpers. One issue that I have run into a lot lately is people re-using SCSI cables. Customers do not like to fork out money for new scsi cables when they purchase new gear. The issue is; the old cable was designed to run SE SCSI at 10 to 20 MB per sec. New SCSI devices running LVD/SE or HVD can run at 40, 80, 160 or 320 MB per sec and the old cables can't handle the throughput and cause all kinds of intermittent problems. Just because the connectors fit does not mean you have the right cable. -----Original Message----- From: G-List [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: October 11, 2004 23:48 PM To: G-List Subject: Re: Corroboration on Termination At 07:28 PM -0400 10/11/2004, MikeRF/A2 wrote: >Can someone here verify this: > >"The terms active and passive were used for SCSI through SCSI III UW. >When LVD/SE and LVD devices entered the market, termination had to be >re-invented, as neither active nor passive would work for all >applications. If you place an LVD/SE drive on a SCSI III UW chain, an >older SCSI III active terminator may work, but has just as much chance >of not working." Yup. >Seagate tells me I need "active negation" termination on my LVD/SE >SCSI Cheetah drive. The drive itself provides no means for >termination. Odd. All drives that I've used have some form of termination available onboard, be it enabled by jumpers or with a flat-pack. If the drive is SCA, then the SCA Adapter will have termination pins. What's the exact model? What are you plugging it into? >Every time I turn around someone redefines the SCSI terminology I >thought I had figured out, making me crazy. No, it's not changed in years. But perhaps you're using newer technologies now and running in to these issues. >Every terminator specifically stating it provides "active negation" >(not many) costs as much as I paid for the drive. ug. Check CyberGuys. - Dan. -- G-List is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- We have Apple Refurbished Monitors in stock! | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> G-List list info: <http://lowendmac.com/lists/g-list.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/g-list%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com -- G-List is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- We have Apple Refurbished Monitors in stock! | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> G-List list info: <http://lowendmac.com/lists/g-list.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/g-list%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
