>33 USB drives, is it possible?
So I'm trying to install more than 127 usb devices into one computer for a project for school.
Every year my school hands out a bunch usb drives to each graduate. I managed to get permission to borrow them before they hand them out.
I want to raid them all together.
-- For science.
--It's the maximum theoretical limit, per host controller
Hubs count towards the 127 device limit.
The problem I'm having is I can't get an operating system to recognize more than 36 of them at once.
Here are my results so far.
Windows 7 turns off the usb port at 36 usb drives and I have to unplug all the usbs and restart to get it working again.
Linux (Ubuntu 10.04) stops recognizing more usb drives after 33. I have no clue why it is failing so far short of 127.
The box has 4 externally powered 10 port hubs, each with 10 usb drives plugged into them which is then plugged into the motherboard. From a power consumption standpoint this should be providing 1.5Amps to each hub and each drive shouldn't be pulling more than 100mA when constantly writing. So I should be good.
ChromeOS (linux I know) stops recognizing drives after 16, haven't played with dev mode.
OSX does funky stuff when 20 get plugged in, it somehow recongizes 23.
Has anyone else dived down this path before?
Proof I'm not just messing with you guys is attached.