MacBook Pro and USB 2.0

After having the issues with my previous laptop (and working for a storage company), I decided to get a USB 2.0 external hard drive to (regularly) backup all of my data. I chose a Maxtor USB 2.0 drive and it seemed to work fine for a few days, but I quickly ran into some issues. The MacBook Pro wouldn’t even mount the drive. I thought it was just the drive, so I went to the local CompUSA and bought a USB 2.0 enclosure and a Samsung 300GB drive. I had the exact same problem. When I did a ‘cat /var/log/system.log’, I could see various messages similar to this one:

May 16 23:16:14 XXX kernel[0]: USBF: 12462. 59 AppleUSBEHCI[0x36e2000]::DoIOTransfer – error 0xe000404f queueing request

I have filed a bug with Apple (#4550783) and they are currently investigating the ‘ioreg -l -w0’ output. If I switch and use a Firewire compatible enclosure, everything works great. Has anyone else had problems with this? I’ve heard this has been an ongoing issue, not anything specific to the MacBook Pro.

[tags]apple, macbook, macbook pro, usb 2.0, usb, firewire, appleusbehci[/tags]

James Burke
Frisco, TX