OK, Can you do this on a PB 520? I have a PPC board and a card cage. Donna Pointer-- iMac, ergo iAm
> Re: Speaking of PCMCIA.. > > > In a message dated 10/17/01 9:11:44 AM, [EMAIL PROTECTED] writes: > > << > Please elaborate on the ultra wide scsi. What kind of a card does this (on a > 520) and how much does it cost? How much faster speed does ultra wide give > you, or is it a matter of being able to use more current devices? >>> > > The 520/540/550's external SCSI port is limited to 5 MB/sec. This is often > referred to as Narrow SCSI. > > There is a variant of this 8-bits-wide SCSI called Fast SCSI. This is used > internally in the 7500 and other similar Macs. > > This is 10 MB/sec. > > But, on machines so equipped, the external SCSI port is still 5 MB/sec. > > And, this external port is on a separate SCSI bus controller chip on many > Macs. > > An UW-SCSI port is 16-bits-wide, and is, consequently, capable of faster > aggregate transfers. > > Certainly 20 to 40 MB/sec, unless it is forced into 8-bits-wide mode by the > device. > > There is a 160 MB/sec variation. > > I believe the PCMCIA UW-SCSI cards are from Adaptec, but there could be > others. > > Most servers use UW-SCSI. > > Current LVD (low voltage differential) SCSI drives are generally compatible > with single-ended SCSI, such as Narrow, Fast, and UW-SCSI. -- PowerBooks 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> PowerBooks list info: <http://lowendmac.com/lists/powerbooks.shtml> 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/powerbooks%40mail.maclaunch.com/> Using a Macintosh? Get free email and more at Applelinks! <http://www.applelinks.com>
