On Oct 20, 2008, at 2:08 AM, Nico Vanden Eynde wrote:
> Are you using a 7200 rpm or faster SCSI drive or the standard 80/160MB > drive > at 3800rpm ? > The faster ( high rpm ) SCSI drives draw way too much power to install > them > in the Colour Classic. The PSU is just not up for this. > > Have a look at the hard drive power requirements on both the 5v and 12v > lines. > In the spec sheets ( Google them ), you can often find the spin-up > current > the drive needs, which is way more than the number on the drive: these > are > just for idle/working mode. > > Sometimes these more recent/faster SCSI drives work for a while in > Compact > Macs like to colour classic but in the end the regulators and > capacitors in > the PSU get overloaded and brake down. > > Also when a drive gets older, you often get "stiction" of the heads, > which > even asks more power to get the heads out of the parking position: > then you > see the hard drive typically spin up and down a few times on power-on > before > it completely shuts down. > That must be the problem since the drive is indeed a 7200rpm 1.2GB. -RPM --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/vintage-macs?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
