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USB pen drives only work intermittantly



Hi folks,

I have a bad feeling that something in the USB subsystem is corrupted in my lab image, but just in case not...

I have a lab of 30 machines which all work perfectly except when one tries to mount a USB pen drive. Sometimes it will work fine and mount and other times it will not. When the drive fails to mount, it appears in system profiler but not in Disk Utility; basically the machine knows there's a USB device there but doesn't see that it's a storage device. Re-starting the machine will usually cause the drive to mount OK a few times but the problem comes back fairly swiftly.

This happens fairly consistently over 30 machines in one lab (1GHz eMacs, 1.25GHz eMacs and G4 (PCI Graphics)) but not in another (which has much the same hardware and software but uses a slightly different image) and the make or capacity of the pen drives seems to make no difference.

Has anyone seen anything like this before?

TIA

--geoff
______________________________________
Geoff Lee <email@hidden>
Computing Support, Architecture
School of Arts, Culture and Environment
University of Edinburgh
20 Chambers St,
Edinburgh, Scotland,
EH1 1JZ
Tel: +44 (0)131 650 8020
______________________________________

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