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Hello all i am extremely suck and can't find a solution to this. I know that it is not a heat issue because i have 2 D-link 7 hubs running 5 erupters with a fan on each. Also i am using bfgminer does anyone have any ideas ?
Any help would be a lifesaver i am losse a G/H right now and for small mine like mine that is huge!!

Update:
I was able to bring the HW errors down 10% by changing my miner.config file to :

{
    "algo": "c",
    "api-listen": true,
    "api-port": "4028",
    "expiry": "120",
    "hotplug": "5",
    "log": "5",
    "no-pool-disable": true,
    "queue": "1",
    "scan-time": "60",
    "shares": "0",
    "kernel-path": "\/opt\/minepeon\/bin",
    "api-allow": "W:0\/0",
    "pools": [
        {
            "url": "xxxxxxxxxx",
            "user": "xxxxxxxxx",
            "pass": "yyyyyyyyy"
        }
    ]
}


Now i am getting 40% Hw errors on the same 4 block erupters. Could it be another setting that might be causing the rest of these errors?

Have you tried running them one at a time to make sure that they are getting enough power? More than likely its the hub not the block erupter.

I have tried several combinations. When one hub with 5 and a fan or 6 and no fan is plugged in it runs under 1% HW errors. But whenever I start daisy chaining them through a non powered of powered hub the errors show up. ???

If they're dead I'll buy them...seriously.

Can you explain as clearly as possible what the current layout of it all is? Like:

PC>
     unpowered generic 5 port>
                                        49 port USB HUB (49 miners)
                                        Dlink 7 port (5 miners 1 fan)


or something similar? I'm sorry, I'm just having a hard time understanding your current layout.

Sure sorry i wasn't very clear. My set up is

Raspberry pi running mine peon >
                                      >a usb linksys wireless card
                                      >D-link 7 port powered hub
                                                                           >D-link 7 port powered hub
                                                                             5 block erupters and a fan
                                                                           >D-link 7 port powered hub
                                                                             5 block erupters and a fan

The Pi doesn't support chained hubs. It's a hardware limitation of its "soft" USB controller. And, worse, your 7 port hubs are probably daisy chained internally.

Technically, it supports one level of chaining. If you have the model B though, you already have a built-in hub, that's how it gives you two USB ports. And, again, most 7 port USB hubs are chained internally and so won't work correctly with the model B Pi.

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=28&t=53832

 Okay then what should i do about it? Also why does this same set up seem to work for other people for instance whonesta's set up in this form https://forums.butterflylabs.com/bitcoin-discussion/766-need-your-help-new-linux-mining-distro-raspberry-pi-minepeon-23.html

just out of curiosity try taking 1 erupter from each daisy chained hub and plug them into the 1st hub with the wireless card. might do something and even out power flow
also make sure the 2 daisy chained hubs are using the charge ports as it sometimes makes a difference

As far as I know the rpi supports hubs nestled 1 deep so this SHOULD work. Just in case though, test this setup with a PC or laptop before further troubleshooting as you may just be wasting time.

What are the power supplies rated for? Its possible that you are running it fairly close to the limit or it could be a bad power supply. I'd try running just 2 BE's at a time (one in each hub) to rule out power/hub issues, if they constantly have errors on hub A then hub A is shot, same if B, if no errors on any BE's you put in (2 at a time) then its power.

If its power I'd keep adding BE's one at a time until I found how many I can run without massive amounts of HW errors. I'd also look up ac/dc adapters and get one that is a bit more powerful than the stock unit. Alternatively you can crack it open and solder +5 and GND wires from a computer power supply (red/black) to the bottom of the barrel jack.

As far as I know the rpi supports hubs nestled 1 deep so this SHOULD work. Just in case though, test this setup with a PC or laptop before further troubleshooting as you may just be wasting time.

What are the power supplies rated for? Its possible that you are running it fairly close to the limit or it could be a bad power supply. I'd try running just 2 BE's at a time (one in each hub) to rule out power/hub issues, if they constantly have errors on hub A then hub A is shot, same if B, if no errors on any BE's you put in (2 at a time) then its power.

If its power I'd keep adding BE's one at a time until I found how many I can run without massive amounts of HW errors. I'd also look up ac/dc adapters and get one that is a bit more powerful than the stock unit. Alternatively you can crack it open and solder +5 and GND wires from a computer power supply (red/black) to the bottom of the barrel jack.
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It is possible my power supply could being doing something strange i will swap it out with another power strip to see if that will help.