Hello,
1. Please refer to the following technotes if the device is compatible with backup exec.
Title : Backup Exec 9.x for Windows Servers Standalone Drives Hardware Compatibility List (HCL)
http://support.veritas.com/docs/271382
Title : Backup Exec 9.x for Windows Servers Robotic Library Hardware Compatibility List (HCL) (includes tested drives)
http://support.veritas.com/docs/271383
If it is please install the latest Veritas drivers:
http://support.veritas.com/docs/273853
If not then install the OEM drivers.
Verify that you have the latest firmware
Verify that the device is not connected to a RAID controller since it is not supported by Backup Exec. Please use a SCSI card with SCSI drivers.
Try the steps in the following technote:
http://support.veritas.com/docs/268626
Most importantly please check if the media used is compatible with the device.
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