--- Mark Benson <[EMAIL PROTECTED]> wrote: <clip> > I've heard nothing but bad news about SCA drives and > running them in > Macs. I guess getting them down to 50-pin is nigh-on > impossible. I > expect they run OK in 68-pin rigs tho as they are > really just 68-pin > drives that are designed to fit in a server with > hot-plug carriers that > have power and SCSI in one plug. <clip>
68 pin, 16bit wide SCSI is designed to be backwards compatable with 8bit wide narrow SCSI. The adaptor used must properly terminate the high byte, then the wide device will automatically "shift" to narrow mode. Wide SCSI devices must fully meet the specifcation to be able to do that. It's possible to connect both wide and narrow devices to a wide bus, but all narrow devices must come after the wide devices, and an inline wide to narrow adaptor with high byte termination should be used between the last wide device and first narrow device. You can connect a narrow adaptor on the last wide device but then that device will run in narrow mode. That's what I found somewhere on Adaptech's website a while ago. Was there ever a Wide SCSI NuBus controller? Especially a non-busmaster one? If I could run my 18.2gig Seagate SCA drive in Wide mode it might be able to keep up with the Media 100's video capture, which it can't in narrow mode. I had to RAID 0 stripe a pair of 2gig drives and a pair of 1gig drives to do it. ===== Say hello to Juror #49. Yep, I'm on jury duty until the end of March. Gotta call in each weekend. Fun. __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it! http://webhosting.yahoo.com/ps/sb/ -- 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
