z/OS DFSMS Software Support for IBM System Storage TS1140, TS1130, and TS1120 Tape Drives (3592)
z/OS DFSMS Software Support for IBM System Storage TS1140, TS1130, and TS1120 Tape Drives (3592)
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OCE modifications for 3592 Model J z/OS DFSMS Software Support for IBM System Storage TS1140, TS1130, and TS1120 Tape Drives (3592) SC23-6854-00 |
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The z/OS® DFSMS Open/Close/End-of-Volume (OCE) component is a set of system routines that builds the control block structure that connects the application, access method, and the operating system. OCE modifications include passing the media type and recording technology to DFSMS, DFSMSrmm, OAM/Library Automation Communication Services, and to the tape installation exits. OCE changes also include commands to scale the MEDIA5 cartridge either for performance or for full capacity and then to ensure that the same scaling factor persists across all volumes of a multivolume data set. During CLOSE of file sequence 1 on a performance scaled cartridge, performance scaling is externalized as an addition to message IEC205I. To make stand-alone tape mount processing consistent with SMS tape,
two system-wide parmlib member DEVSUPxx options
are added to ensure data class media policy is enforced for stand-alone,
non-specific mounts:
OCE detects new OPEN and EOV abends for WORM support when write
violations are detected:
The OCE routines also include the IFGTEP macro with several fields for mapping installation exit parameter lists. Values that can be returned are: EFMT1 in TEPMRECTK recording technology and MEDIA5, MEDIA6, MEDIA7, or MEDIA8 in TEPMMEDT media type, as shown in Table 1.
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