i have installed a brand new IBM 3650 server with a single ibm dds5 sata tape drive attached . i the server is installed with windows 2003 r2 and CA Arcserve backup r12 sp1. whne i try to run any backup it fails with an error code E3712"unable to close session" E3719 unable to write media media name and EC=Hardware Error" . I tested the backup with ntbackup its working fine with same tape drive and media. any body know the solution please help.