08-22-2009 04:11 PM
I own a pair of Maxtor Onetouch IV 500GB, USB 2.0 drives that I purchased about a week or two apart from Staples. Both are formatted journalled HFS+. In a spate of brilliance, I am using the identical drives to back each other up, rsyncing one to the other on a periodic basis. This system had worked for a while, but has since stopped.
This is currently a problem, as both have stopped working when I connect them to either my Macbook Pro or my employer's iMac. When connected, they do one of two things:
a) they don't show up in Finder or in Disk Utility, and the system.log file records numerous USB errors, such as:
Aug 22 17:19:19 intelbook kernel: USBF: 648.779 [0x3c85900] The IOUSBFamily is having trouble enumerating a USB device that has been plugged in. It will keep retrying. (Port 3 of hub @ location: 0xfd000000)
Aug 22 17:19:20 intelbook kernel: USBF: 649.197 [0x3c85900] The IOUSBFamily was not able to enumerate a device.
b) the drive is recognized, mounts very briefly, and then disconnects itself without any input from me (i.e. no touching of cabling, etc). This is not a clean unmount, so I also get the "Device not correctly removed" warning from the OS. This process seems to repeat itself ad naseum until I unplug the drive.
I have tried with minimal other USB devices (none, in the case of my MBP, and just the Apple keyboard and mouse for the iMac); I have tried with and without a hub between the computer and the drive. Other USB devices seem to work fine.
I have tried with and without the Maxtor software and drivers installed.
I would very much like to get one (or both) of these drives working so I can pull my photos off them, preferably without pulling a case apart and putting the drive in another enclosure (a possibility, but one I'd like to avoid, as these drives should still be under warrantee).
Any and all suggestions appreciated.