USB Drive Controller Failure and Shared IRQ

[Matthew Carpenter]

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Hi all,

I used to consider myself pretty great with HW (back when we had to
control everything).  Since PCI and auto-resource management came about
I've kinda just let the machines do what they wanted to except where ISA
was involved.

I have had a machine that I've been trying to do a drive-backup from a
SATA drive to a USB-attached drive (using RSYNC for offsite backup.
Very slick).  All goes well for about an hour.  Then errors start
happening and the backup never completes.  A reboot is necessary for the
drive to even be recongnized again.

This same USB-drive and cable work flawlessly doing the same thing on
several other machines.

I thought it must be the USB controller built into the board.  So I
bought another one and plugged 'er in.  Same results.  I just ordered a
replacement Mobo and this morning I notice that IRQ 10 is being shared
by (this information came from the BIOS boot-screen, not Linux):
*) The USB controller on the Mobo
*) The new USB controller (PCI)
*) The SATA RAID Controller.

Could this be causing my issues?  I would think that issues caused by
shared-IRQ would occur next to immediately, and have far worse effects.

Thanks all!

- --
Matthew Carpenter
matt at eisgr.com                          http://www.eisgr.com/

Enterprise Information Systems
* Network Server Appliances
* Security Consulting, Incident Handling & Forensics
* Network Consulting, Integration & Support
* Web Integration and E-Business
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