HP-UX 11i v3 Read Before Installing or Updating, September 2007 (Update 1 Release)

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USB Mass Storage Device Not Configured
If no USB mass storage device is attached to your HP-UX system
at installation, the USB mass storage driver will not be
configured into the kernel. If a USB mass storage device is
subsequently attached to the system, HP-UX will not be able to
communicate with it because the driver has not been configured.
What To Do
Verify that the USB software is installed on your system by
executing the following command:
swlist -lproduct USB-00 | grep BLKONLY-MS
If the installation scripts indicate that the USB product was not
installed because the legacy USB driver was disabled, run
'kcmodule -s hcd=static hid=static hub=static' and
reinstall USB-00 by executing the command 'swinstall
USB-00' using your install media.
Once USB-00 is installed, you can configure it into the kernel
using the kernel configuration tools as follows:
kcmodule -s UsbBulkOnlyMS=static UsbIomega=static
Reboot your system to make sure the changes take effect.