USB Loopback Errors

rdupont

Junior Member

Join Date: Jun 2007

Posts: 3
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#1

USB Loopback Errors

Jun-20-2007, 04:06 PM

We are seeing the following USB Loopback Error using Passmark 5.2, USB 1.1 Loopback Plugs and Windows 2000; USB, SERIOUS: USB1 Plug 1, Data packet transmission failed (Code 4) [Serial#; PM29KDT6]. Is this an internal data packet transmission fail that gets corrected by CRC in the USB or a real data packet error?
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Ian (PassMark)

Senior Member

Join Date: Feb 2004

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#2

Jun-21-2007, 05:56 AM

This is a I/O write error, rather than data validation or CRC error. It is a real error that would not be corrected in a lower USB layer.

Regards,
Ian
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