IBM Magstar 3494 manual Import and Export List Volumes Format

Appendix B. Virtual Tape Server Import/Export Advanced
Function
Import and Export List Volumes Format
	Lists of volumes for Export or Import are provided to a Virtual Tape Server on
	logical volumes called the Export List Volume or the Import List Volume, which are
	resident in the VTS. The following ®gures de®ne the requirements of the format for
	the Export List Volume and Import List Volume. There are ®elds, records or ®les of
	the two formats which are similar; therefore, only one ®gure for these similar areas
	is shown. For example, the Import List Volume ®gures refer to a HDR1 ®gure which
	is in the Export List Volume section.
	Sample JCL for preparing the Export List Volume and Import List Volume is
	available in the Object Access Method Planning, Installation, and Storage
	Administration Guide for Tape Libraries, SC26-3051, and also in the Redbook
	Enhanced IBM Magstar Virtual Tape Server: Implementation Guide, SG24-2229.
	The Export List Volume is an IBM Standard Labeled tape volume which is selected
	from the logical volumes in the VTS. Three ®les are written to the volume. The ®rst
	®le contains logical volume - destination pair records and is called the Export List
	®le. The second ®le has a minimum of one record and is reserved for future use.
	The third ®le is the Export Status ®le and is initially written by the host without any
	data records. Upon the completion of the Export operation, the VTS will write status
	®le records for each of the logical volumes listed in the Export List ®le indicating the
	processing results.
	The Import List Volume is an IBM Standard Labeled tape volume which is selected
	from the logical volumes in the VTS. Two ®les are written to the volume. The ®rst
	®le contains records specifying the Exported Stacked Volumes and logical volume
	to Import or to Import all logical volumes. The second ®le is the Import Status ®le
	and is initially written by the host without any data records. Upon the completion of
	the Import operation, the VTS will write status ®le records indicating the results for
	each of the logical volumes listed speci®cally and the logical volumes contained on
	an Exported Stacked Volume listed when all logical volumes were to be imported.
Export List Volume
	Due to the size of a monolithic, detailed format description for the export list
	volume, the format is described in hierarchical form in the tables below. Start with
	Table 23 on page 308, then proceed as directed to the portion(s) of interest.
	All character ®elds within the volume are in EBCDIC. Field contents speci®ed in
	quotes are EBCDIC characters. The volume must be written with compaction turned
	off.
	No space is reserved in the records of the list and status ®les. Expansion for later
	versions can be accomplished by rede®ning the ®le identi®er records and data
	records for the ®les. Such changes would be re¯ected in the Record Length entry in
	the HDR2 and EOF2 records.

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