MacPro Front Firewire and USB Ports Acting Up

Devices connected to the front firewire 800 and USB ports on my MacPro are acting up. (2x2.66GHz dual-core, early 2007) I put a firewire rugged LaCie onto the firewire port and the MacPro hung. The drive works fine on my MacBook. On the MacPro, the CPU on all cores ran up to 100% and the machine became inaccessible. I put a 80 GB video iPod on the USB port and it could not sync without errors. Could not eject the iPod - OS X reported that an application was accessing the device, even though nothing was running.
It seems as though connecting devices to the front ports initiates a process that does not behave and/or teminate correctly. All other ports work OK, including those on the back of the machine and the USB and firewire ports on my Cinema display.

OK, a couple of things. First, have you tried another USB cable? You may have one that is flaky at USB2 speeds which can cause all sorts of mischief.
Have you tried both "free" USB ports on the machine, or the USB port on the machine that you have the keyboard hooked to?
Finally, you may find some information in your system log that would point to the answer.
In my own experience, USB2 on the G5 has not been capable of reaching serious transfer rates. While I get transfer rates close to 60 MB/sec through FW800, I have never gotten more than about 13 MB/sec through USB2, using several flavors of external drive/SATA toaster/enclosure interfaces. However, I have also had bad USB cables lock the machine up like the Tin Man.

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Try Reset SMC. http://support.apple.com/kb/HT3964
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Message was edited by: EZ Jim
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Hey guys, I just got an used but in mint condition mac 1.8 dual with os x 10.4.11. Im trying to copy some big files to it via USB but it keeps frozing up and I have to reboot the machine. I ran disk utility and there was no problem. I found that via the port on m y keyboard is not freezing but it's gonna take like 2 days to transfer 50 gb. Is there any way to test the usb ports for errors?
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OK, a couple of things. First, have you tried another USB cable? You may have one that is flaky at USB2 speeds which can cause all sorts of mischief.
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Hello! Resetting the ports is done by resetting the pmu. press the button once with all external cables unhooked. Below is a pict of an example of the pmu location. Also an intermittent problem is often a bad cable. Tom
[IMG]http://img470.imageshack.us/img470/1623/mddlogicbd4ga.jpg[/IMG]

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my friends machine is no longer using devices connected to the firewire and USB ports. Here is the description of troubleshooting steps so far. Any other suggestions?
--- snip ---
suddenly my G5 tower stopped recognizing any firewire device... no harddisk no soundcard.... also the same harddisk is not recognized via USB....
BUT.... the USB ports recognize USB sticks, mac keyboard, mouse.. no problemo.
also.. at the same moment the built in soundcard (mac av) stopped working, AND the internal CD drive !!!
i tried : flashing the PRAM ... on boot up hold down command, option, P, and R until the machine reboots it's self then let off the keys...
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2. Disconnect ALL cables from the computer, including peripherals and power.
3. If possible, move the computer to a place where you are not standing on carpet.
4. Open the case and ground yourself by touching part of the metal frame inside the computer.
5. Find the Cuda or PMU button
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7. Wait 10 seconds, then reconnect the cables you removed in step 2 and turn the computer on.
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screen. You will be prompted to release keys at this point.
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gromit95 wrote:
replaced battery did not fix problem
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That date code was probably the build date code, rather than the expiration. This would be true for either the Tadiran or Saft batteries. The lithium batteries have a shelf life of up to 10 years.

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Hi Jamie,
Could be many things, we should start with this...
"Try Disk Utility
1. Insert the Mac OS X Install disc that came with your computer, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
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3. Click the First Aid tab.
4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
5. Select your Mac OS X volume.
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http://docs.info.apple.com/article.html?artnum=106214
Then Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot.
The usual reason why updates fail or mess things up, is if Permissions are not fixed before & after every update, with a reboot... you may get a partial update when the installer finds it doesn't have Permissions to change one obscure little part of the OS, leaving you with a mix of OS versions.
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I am looking to add more Firewire 400 and USB 2.0 ports to my Dual 2.7 PowerMac G5. I don't need a combo card (two separate cards is fine). I was wondering which brand card works well with my Mac and OS X. I had a FireWire card that I moved from my Dell to my PowerMac but had a number of problems with a couple connected HDD's and Final Cut Pro. The card which I think was from Belkin was listed as OS X compatible on its packaging.
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Check out OWC/Macsales. Usually can't go wrong with Sonnet or an OWC "house branded".
http://www.macsales.com
Check out user reports for PCI G5 Compatibility
http://www.xlr8yourmac.com
I've used OWC FW800, Aaxeon PCIe, and a number of Sonnet USB2 (and combo).
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MacPro Front Firewire and USB Ports Acting Up

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