Date: Sat, 21 Jun 2003 15:08:03 -0400 From: "W. Adrian D'Alessio" <[EMAIL PROTECTED]> Subject: Re: HD speed
One of the Hardware Hell link sites I looked at this morning said that the Quantum Fireball drives spun at 4800 but were equal in overall performance to many 5400 rpm drives.
I think many SCSI 50 pin drives run at 7200 rpm.
I missed the beginning of this discussion, so please pardon me if this has already been said.
Rotation speed is not a good predictor nor basis for comparison of hard drive performance, unless the drives being compared were released within about six months or a year of each other.
For example, the early Barracuda ST32550N drives are a narrow SCSI drive which spin at 7200 RPM. Sounds great right? They deliver no better than 6 MB/s of data no matter what you do to them. That's as fast as they go, because that was good performance back when they were released. The 7200 RPM ST15150N is even slower.
Today's 7200 RPM hard drives can deliver in the neighborhood of 20 MB/s or more (I'm a little out of date on the topic). Which makes them faster than the first Cheetah models which spun at 10,000 RPM.
So, a 5400 RPM drive may be faster in real performance than a 7200 RPM drive if the 5400 RPM drive was released a year or more later than the 7200 RPM drive.
Model year is usually much more important than rotation speed when predicting hard drive performance.
Jeff Walther
-- 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
