On Jun 22, 2009, at 11:14 AM, John Martz wrote:
> > On Mon, Jun 22, 2009 at 2:00 PM, Bruce > Johnson<john...@pharmacy.arizona.edu> wrote: >> >> No. So long as you can connect them (and both 2.5" and 3.5" drives >> require the same voltages) things should work out fine. > > I don't know how pertinent to this thread this is, but I'm not > positive they use the same voltages. > > I agree that since both 2.5" & 3.5" drives use the same connector then > the same voltages should be *supplied* to the drive. However, I don't > know how they could pull off the trick of powering a 2.5" drive from a > USB connector unless the 2.5" drives required anything other than 5v. > > I've always assumed that the 2.5" drives simply ignored the 12v power > line in the connector (and probably also the 3.3v ... as apparently > most (all?) of the 3.5" drives do in order to allow them to be powered > via a 5v & 12v 4-pin molex connector plugged into a SATA power > connector adapter). > > I hate it when manufacturers take "shortcuts" and don't fully > implement a spec. But it's a fact of life that they do this when > "everbody knows" it will work. It wouldn't surprise me at all if the > 12v (and 3.3v) pins on most laptop supplies were open. > > Sorry to view off point so far. > > -irrational john > Well after plugging the 2.5 into the I/O board and the power supply, the 2.5 booted and ran fine. However when the 3.5 drive was used, it wouldn't even mount on the desktop? This icydock enclosure has always given me grief when it was hooked up via USB... it would "unmount" itself after 3 mins or less time plugged/ mounted on the desktop? This must be a power supply issue then... wonder where to get another power supply for it? I hate to chuck it in the trash.... Jeff --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed Low End Mac's G3-5 List, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com To unsubscribe from this group, send email to g3-5-list-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
