In a message dated 3/1/03 6:17:38 PM, [EMAIL PROTECTED] writes: << So the IDE drive is just as fast I assume as if it were connected to an IDE bus? >>
No. The drive transfers data to the "Bridge" at a maximum rate of the drive, not to exceed 40 MB/sec, which effectively means a drive, even an UATA/100 drive, is operated at a UATA/33 level. The Bridge transfers data to the host at the maximum rate which the host adapter can accommodate, which for a F-SCSI bus is 10 MB/sec, and for an UW-SCSI bus is 20 MB/sec, but for a N-SCSI bus is 5 MB/sec. The fastest combination will always be a fast native UATA bus (such as the UATA/33 bus on the B&W G3 or the UATA/66 and UATA/100 buses on the G4) and a similarly fast drive. The Beige G3 bus, and the second buses of the later machines, are limited to 16.67 MB/sec. An UATA card is one way to simulate a fast native bus, and yet have these drives appear as if they were SCSI ... for machines and OSes which can accommodate these cards. -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.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/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
