At 15:27 -0400 05/12/2002, Phillip L.Meza wrote: >Alan, I think you misunderstood. I do have a SCSI internal burner, a >Yamaha 2100S I've been running it from MoBo since initial install a >year ago now. Early on I eliminated the Jackhammer card and was told >I could successfully run a device such as a CDRW no problem from Mobo >in addition to my Epson 1200S Perfection Scanner. Im running both >devices in OS9.1 & OSX successfully. I had the adaptec 2930U card >from my C600 machine and thought about reconsidering SCSI as a "Help" >maybe to run those devices more efficently but as you stated >"redundancy" here.
The built in SCSI busses have maximum theoretical performances of 10 MB/s and 5 MB/s for the Internal and the internal/external busses (0 & 1) respectively. The 2930 card has a maximum theoretical performance of 20 MB/s but your devices must support Ultra-SCSI or better in order to benefit from it. That said, I don't think that a CDRW drive will transfer enough data to get much benefit from the extra throughput. Anything up to 16X or so probably won't push the 5 MB/s limit. You're probably good to at least 32X for the 10 MB/s limit, figuring that all those nXs and Y MB/s are theoretical maximums and assuming that the various inefficiencies will cancel out. A moderately fast hard drive (by today's standards) would benefit from the 2930U over either of the built-in busses. Jeff Walther -- SuperMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | Service & Replacement Parts [EMAIL PROTECTED] | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> SuperMacs list info: <http://lowendmac.com/supermacs/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/supermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
