Hello,
From the technote given below verify if the device is listed in the hardware compatibility list.
(title) Where to find a list of supported devices for VERITAS Backup Exec (tm) and the latest drivers for supported tape drives and robotic libraries
http://support.veritas.com/docs/251466
If the device is tested then install latest Veritas Drivers.
If the device is compatible then install OEM drivers and verify results
thanks
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