At 7:45PM 6/8/03 [EMAIL PROTECTED] wrote: >I have a 7500 that has a 20GB seagate barracuda hard drive. I put the >seagate in when the old drive went kaput less than two years ago. As soon >as I installed the drive I too heard a strange clicking noise that scared >me. Sometimes it would also make a faint, tinny-sounding (as in tin, not >tiny) beep. The noises weren't constant, just once in a while. But, the >drive appeared to work just fine, so I just got used to it. > >
SCSI drives have a clutch that engage the read/write head when the platter achieves optimal 7200-10000 rpm speed, and disengage them when you shut down. A stepper motor moves the head to read data sector by sector. These two actions necessarily make them noisier than IDE drives. The trade-off is data security - the heads write backups of data on any available space on each platter so recoverability is better and by design free up the cpu to perform other functions while reading/writing data. Charlie -- 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
