Hi, please check the following also:
- Are SCSI cables inserted properly for single host configuration? Check MSL doc for proper cabling.
- If this is Fibre Channel tape library, and all devices are doubled (instead of one robotic, you see two, instead od two drives, you see four), library is probably set up for multipath, and you can use it in Data Protector as such (Multipath option when configuring library in Data Protector).
- Is this tape library partitioned in two logical libraries? Check MSL web GUI or local GUI if this is true.
- Are HP StoreEver drivers installed and up to date?