Do you need tape cartridges with more capacity ?
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If you need tape cartridges with more capacity, the IBM TS1140 tape drive may be an option. z/VSE supports this tape drive since mid of last year. To get the TS1140 supported you need to apply APAR DY47436. DITTO/ESA also needs to be updated with APAR PM62302. The TS1140 support is included into z/VSE 5.1.2.
Cartridges are supported as re-writable or WORM (Write Once Read Many) formats.
The TS1140 also supports drive-based data encryption to protect your data. The IBM Encryption Key Manager (EKM) component, a Java program, is used to manage encryption keys. The EKM and the tape drive communicate via the TCP/IP protocol.
A job running on z/VSE can issue a request to encrypt the data to be stored on tape. This request is initiated using the appropriate mode setting in the Job Control ASSGN statement and the Job Control KEKL statement. The KEKL statement contains the key-encryption-key label retrieved from the EKM.