occasional usb hangs

[David Relson <relson@xxxxxxxxxxxxxxxxx>]

Greetings,

I'm having some USB problems.  I'm using BackupPC to perform system
backups to an external hard drive (Maxtor L100P0) in a usb enclosure
(with Cypress Semiconductor usb).  A full back is approx 3,100,000
files totaling 65 GB (compressed to 31 GB) and takes 12 or so hours
during which the USB drivers get a decent workout.

The first part of this year running Mandriva kernels (2.6.14 and
2.6.15) all worked well.  I switched to Gentoo several months ago.
With its default 2.6.17-gentoo-r7 kernel, the USB subsystem would hang
pretty much every time I ran a full backup.  A few weeks ago I
switched to the 2.6.18-gentoo-r1 kernel and backups have been working
quite well, though not 100%, i.e. there's an occasional USB subsystem
hang that requires a reboot to clear.

I'll be glad to provide additional info if you'll let me know what you
want/need.

Regards,

David

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