On Fri, 2008-11-28 at 09:02 -0800, Duane Brimhall wrote: > For the record (and I hope I'm not adding to the confusion), I've tried to > operate two WD My Book 320Gb Powered external drives from a single USB 2.0 > powered hub (plugged into the back of the computer). The computer (HP) would > only recognize one of the drives. > > I'm not using notebook drives that get their power from the computer. > > When I plugged one of those drives directly into one of the front ports, it > would be recognized, and it would show that I had two My Books hooked up (the > one still hooked up to the hub and the one from the front port). > > I guess what I was trying to say is, that I need to buy a few extra powered > hubs to see what would happen if I plugged one My Book, and no more than > that, into each of the powered hubs (I've got four, I'm holding two in > reserve). I have a similar number of ports on my computer as Jim. > > Based on what Jim said earlier, and confirmed by what I tried to do before I > knew about Jim's attempts, multiple hard drives off the same hub don't work. > > The next experiment that I need to try is to plug another one into another > port and see if my computer suffers from the same 1TB limit as Jim's. > > Duane > Forget using hubs when plugging in things like Hard Drives that don't have their own power supply. Mr USB port runs on about 6 volts and then Mr User jams 2 or 3 hard drives in which each need to drive a motor for the platter and a step motor for the pickup arm and all of a sudden you have a port that can't deliver enough juice to light an LED let alone run 4 or 6 motors. Simple voltage drop, besides which Mr USB port is like a road...he is only so wide and when you plug a device in singly it has the whole road to drive on...plug in another and each has half a road...plug in 4 and they have a quarter each...see where this is going ?...USB is basically a fixed bandwidth for data transfer, and not a particularly good one at that despite all the noises that business make when they try to sell you USB devices. It's a bit like wireless networks..sold as a done deal but anyone who has to deal with them knows just how poorly they perform in reality. Also don't trust your Western Dogfood drive....another brand with which I have used the dead members of it's bretheren to pave my 200 metre long driveway. Not trying to be a negative soul here just my experiences.
Bones -- --------------------------------------- Linux....no need to open Bill's Gates --------------------------------------- -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Papermodels II" group. 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/Papermodels?hl=en -~----------~----~----~----~------~----~------~--~---
