Bruce Johnson wrote: >>I don't want to bore other listers, so if you want to e-mail me directly, and >>discuss it deeper, that's ok. >>STeve >> >> >Well, from what I can tell, you've managed a seriously complex and >redundant test of your 50 MHz system bus, Steve ;-) > Thanks Steve for a very interesting, off list (as requested) summary.
>Testing the ATA card would best be done by transferring files from a >drive on one bus to a drive on the other, > Was included. as was FW >Also, Firewire connects at 400 mega*bits* per second, not mega*bytes* >that's an eightfold difference right there. That means it's about 50 MB/sec. > Still 4 - 5 times faster than standard scsi and able to daisy chain more devices than ATA or scsi. >Also, *everyone* lies about their transfer speed./ Most devices do well >with burst transfers where the data's alrready in the memory buffers. >That's how they achieve their higest speeds, and is only rarely, if >ever, achieved in real life. > Especially on these machines. Nice to see someone will do the work and send you the results. Could someone lend Steve a scsi card to complete the test. ;) >These are also measuring the speeds where the device or interface it >self is the limiting factor. Since you're moving data between different >devices on all your interfaces, you're measuring the speed of the common >bottleneck...your system bus. :-/ > Which is why a decent test is needed, what performs best with our chosen limitations? For that matter how much is gained by adding a 10k drive, replacing the 5.4 rpm drive in a beige powermac? 7.6k being a general and easy upgrade for most of us. I wasn't too surprised by most of the results, some where very interesting. With the sale of 800mhz upgrades for our machines, serious questions should be asked regarding the value of such upgrades compared with the upgrades to the rest of the machine and what sort of performance should be expected. Based on Steve's results, my choice of going with FW on this machine wasn't the fastest choice I could have made (latency I guess) though for the future of this machine it doesn't stack up badly against ATA. I wont woffle on :) Thanks for the results Steve. I hope other folk will bench mark their systems so we all can see what's best for us considering our Mac's limitations, in given fields and for differing tasks. -- 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
