DSM/Tape Catalog Operator Interface (MEDIACOM) Manual

MEDIACOM Commands
DSM/Tape Catalog Operator Interface (MEDIACOM) Manual—429828-010
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RECOVER DISKFILE Command

If you enter N, RECOVER DISKFILE ends with no further processing.

Wild-card characters in a disk file name or tape file ID
If you think RECOVER DISKFILE might find the wrong tape file entry because of
wild-card characters in disk-file-name or tape-file-id, use the wild-carded
names first with INFO DISKFILE to determine what is selected. If INFO DISKFILE
retrieves more than one tape file ID, you can choose the one you need and use
that name without wild-card characters in the RECOVER DISKFILE command.
Wildcards may not be used for Backup and Restore 2.0 object names except
CATALOG *.

Specifying multiple disk file names
If the disk file names you specify in the RECOVER DISKFILE command were
cataloged and part of the same multitape tape set, RECOVER DISKFILE can
easily determine from the catalog entries which tapes in the tape set contain the
files. It requests only those tapes to be mounted. This approach makes for an
efficient recovery.
If the disk file names were not cataloged, but the tape file ID for the backup tape
was, you can still use RECOVER DISKFILE. The entire backup tape set is
specified in the DEFINE for RESTORE (There is no way to know which tape
contains the disk files without the disk file entries). RESTORE reads through each
tape until it finds the disk file or files to copy.

Finding the wrong generation of a disk file entry
If your DSM/TC system has more than one file catalog and you ask RECOVER
DISKFILE to search some or all of them, the command might find a tape file entry
that does not represent the most current generation of the disk file name.
This situation occurs when the file catalog that has the most current entry is not
included in the set of file catalogs you specified or the file catalog was included but
unavailable. For example, this RECOVER DISKFILE command searches all the file
catalogs on the current default node:
MC> RECOVER DISKFILE $MIS.X45.DEPT602, FILECAT *
The current default node has three file catalogs residing on three different disk
volumes:
GEN_ACCT_CAT on $MONEY
OPS_CATALOG on $OPERATIONS
MIS_CAT on $MIS
The entry for the most current generation of $MIS.X45.DEPT602 is stored in
GEN_ACCT_CAT. The next current generation is cataloged in OPS_CATALOG. If
all file catalogs are available when RECOVER DISKFILE executes, the command
chooses the catalog entry in GEN_ACCT_CAT as the one to use.
However, if some condition prevents access to $MONEY, the disk volume where
GEN_ACCT_CAT resides, RECOVER DISKFILE searches the two remaining file