One or more volumes can be scanned to accomplish the implicit migration of data sets that meet user-specified criteria.
The SCAN command syntax is:
SCAN VOLUMES=,DSNAMES=,EXEMPT,METABLE=,GDGSONLY,NONGDGS,MINSIZE=,MAXSIZE=,
TYPE=,LASTUSE=,DATE=,GENER=,ANY
Note: The volumes= parameter and at least one of the selection criteria (MIN=, MAX=, LAST= or GENER=) is required. If selection based solely on the DSN= list is desired, code MIN=0. MIN=, MAX= and LAST= apply to both GDG and non-GDG data sets. GENER= applies only to GDG data sets. For example, coding GENER= and MIN= on the same command implies two tests for GDGs, one for non-GDGs.
This required parameter contains a list of one or more volume serial numbers or prefixes to be scanned. (A MAXIMUM of 50 entries is supported.)
A list of one or more data set names or patterns to which migration is to be confined. (A maximum of 10 entries is supported.)
This parameter causes an exemption list to be examined before migrating any data set. Unless the MET= parameter specifies an alternate member name, the exemption list is assumed to be in parmlib member MIGRATXM.
If an exemption list has been placed in a member other than MIGRATXM, specify the member name as the value of this parameter.
The presence of this parameter limits the data sets being considered for processing to only those that have GDG names.
The presence of this parameter limits the data sets being considered for processing to only those whose names are NOT of the GDG format.
Specify a one to nine digit number indicating the minimum size of a data set that is allowed to be migrated. Data sets equal to or larger than the size given will be selected. This optional selection parameter is specified in units indicated by the TYPE parameter.
Specify a one to nine digit number indicating the maximum size of a data set that is allowed to be migrated. Data sets less than or equal to the size given will be selected. This optional selection parameter is specified in units indicated by the TYPE parameter.
Specify the type of units in which the size criterion has been expressed in the MINSIZE or MAXSIZE parameter.
This optional selection criterion causes unused data sets to be migrated. Specify the number of days that a data set is permitted to remain on disk without being used. When this number of days has elapsed, the data set is selected for migration.
The current date is normally used to determine the number of days since a data set was last used. An alternative date to be used in this calculation can be specified for this parameter. It must be in an accepted CA Disk format.
This optional selection criterion is used to specify the number of generations of each GDG data set that are to be kept on disk. All older generations will be selected for migration. For example, GENER=2 is interpreted to mean keep the two most current generations of each GDG on disk and migrate the others to tape. In other words, DSN=THE.GDG(0) and DSN=THE.GDG(-1) are kept on disk; the (-2), (-3), and so on levels are selected for migration.
Exceptions to the number specified on the GENER= parameter can be supplied in member GDGDASDG. As each GDG data set is being processed, entries in the GDGDASDG member will be searched for a matching data set name or pattern. If found, the number of generations kept on DASD will be the number given in the member entry. If no match is found, the global value supplied by the GENER= parameter will be used. See GDG DASD Generations List in the Systems Guide for more details.
Note: The GDGDASDG member is not searched unless the GENER= parameter is present.
When more than one selection test is specified, this parameter causes the data set to be migrated if ANY single test is satisfied. The default requires that ALL multiple tests be satisfied.
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