You are welcome. What USB hub are you using, and how many erupters. I really want something like the Anker, top mounted plugs and 10 ports that works with the Pi?
There actually is a great 49 Port USB 2.0 hub that works with the RPi, but unfortunatly that hub from Cambrionix costs a small fortune.
Be aware of always leaving like 0.5A headroom on a hub, so if you get a 5 Port hub with a 2.5A power supply only plug in 4 Block Erupter. On a 7 Port with a 3A power supply max 5 Sticks, with a 4A power supply you can use all 7 ports. This will help with stability and longer life of the hub.
I am thinking that the D-Link DUBH-7 could handle at 6 or seven. 5 of the port are 0.5amp and two are considered charging ports and are 1.2 amps. So six or seven block erupter would not overload it. I only have one block erupter now. I have five more on the way. So we will see.
Specs below.
Supplied Charging Current
Standard Mode:
All seven USB ports- 0.5 A per port 2
Fast-Charge Mode:
5 standard USB ports- 0.5 A per port 2
2 USB fast charging ports - 1.2 A per port 2
Yes BUT the power supply only supply's 5v 3A so the maximum be it would support is 6.