Hi, The power supply in (most) external cases is heavy enough for powering most 7200 rpm SCSI drives. If you go to 10000 rpm drives in an old external case then you will likely see power issues again.
I would recommend installing a standard IBM or quantum Prodrive LPS 160MB drive in your Classic Colour and use this drive just for the OS and install all your applications on the external drive. Of course you could install everything on the external drive as well and boot from this one immediately, it's just a matter how you set the SCSI ID on the hard drive. If you want a completely silent classic Colour you can always try this Mod: - buy a Solid state IDE hard drive of 4 or 8GB with SLC chips - get an Acard SCSI to IDE adapter ( Ebay.com ) and a pair of brackets from 3.5 to 2.5" as the SSD is a 2.5" drive. You will get a super fast hard drive & completely noiseless system. I have modified my SE/30 this way and replaced the standard fan with a temperature controlled super-silent one and the system is now practically noiseless. The upgrade: 4GB Transcend IDE SSD, temperature controlled quiet fan, extra mounting brackets and the Acard adapter costs about 160 euro. Take Care, Nico -----Oorspronkelijk bericht----- Van: [email protected] [mailto:[EMAIL PROTECTED] Namens Bobb Choate Verzonden: maandag 20 oktober 2008 23:11 Aan: [email protected] Onderwerp: RE: Mystic Color Classic Low Voltage Greetings Every1;; I had a similar issue and did as a previous eMail suggested - Mounted in an external case with its own power supply and all was good!!! Peace Bobb <>>< 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 -~----------~----~----~----~------~----~------~--~---
