Iomega SCSI-to-USB cable problem

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Hi,

I have an Iomega SCSI-to-USB cable, model# SCSI USBA. Iomega called it the
Jaz USB Adapter; see
http://www.iomega.com/europe/support/english/manuals/jazusb/home.html
Picture: http://ecx.images-amazon.com/images/I/31Q4Z3PMT5L.jpg

My cable has USB ID 059B:0040. It is identical in appearance to the
Microtech XpressSCSI, which does work with Linux. Both are probably OEM
products manufactured by Shuttle Technology/SCM Microsystems.

I haven't been able to get my cable to work, though I only tested it with
non-Iomega drives. Has anyone used this cable with non-Iomega drives?
Either mine is faulty, or its firmware is designed to only work with
Iomega drives. (I think it's most likely faulty.)

I get this dmesg output on powering on the SCSI device, inserting then
eventually disconnecting the USB cable:
[ 5908.360421] usb 7-1: new full speed USB device number 4 using uhci_hcd
[ 5910.564219] scsi8 : usb-storage 7-1:1.0
[ 5913.704183] usb 7-1: reset full speed USB device number 4 using uhci_hcd
[ 5918.032207] usb 7-1: reset full speed USB device number 4 using uhci_hcd
[ 5922.348444] usb 7-1: reset full speed USB device number 4 using uhci_hcd
[ 5924.916423] usb 7-1: reset full speed USB device number 4 using uhci_hcd
[ 5965.296235] usb 7-1: USB disconnect, device number 4

I created usbmon and Wireshark captures when doing that. If anyone feels
like investigating, I have uploaded them (~5KB archive) to
http://www.mediafire.com/download/uw4d4dmcq8qfbwg/Iomega_SCSI-USB_problem.tar.gz

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