Rather than fiddle with rmmod, perhaps loading ehci_hcd in the
initrd.img file is the answer. It certainly seems to have resolved my
problems, with fully patched Hardy....
1. Add to /etc/initramfs-tools/modules:
ehci_hcd
2. Reconfigure current kernel:
dpkg-reconfigure linux-image-2.6.24-23-server
3. Reboot.
dmesg confirms that ehci_hcd is loaded before ohci_hcd, and that my
usb_storage device is using ehci_hcd. I'm getting about 27MB/s write,
and about 10MB/s read&write onto the disk, without errors.
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ehci_hcd module causes I/O errors in USB 2.0 devices
https://bugs.launchpad.net/bugs/88746
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