HP BACKCOPY, Справочное руководство

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DP2FORMAT
The DP2FORMAT option directs BACKUP to write all files to tape in DP2 format (tape format 2).
DP2FORMAT
Guidelines
•
Any DP1 files encountered are converted on disk into temporary DP2 files and then written to
tape.
•
Because SQL objects can be backed up only with tape format 3, any SQL files named in the
backup-files
are skipped.
•
For DP2 key-sequenced files, index blocks must be the same size as data blocks; this is not
true for DP1 files. When you use the BACKUP utility to convert key-sequenced files from DP1
to DP2 format, the index-block size is changed if it is not equal to the data-block size. This
block change does not apply to relative or entry-sequenced files.
•
You can use BACKUP to copy an entry-sequenced DP1 file to a DP2 file on tape. However,
if the DP1 file does not have a DP2 block size, the block size is rounded up to a size compatible
with DP2 (that is, 2048 or 4096 bytes). Block sizes not compatible with DP2 include 1536,
2560, 3072, and 3584 bytes. This operation changes record addresses in the file. If BACKUP
converts a primary DP1 entry-sequenced file to DP2 format, the program displays a warning
instructing you to perform a FUP LOADALTFILE operation on all the alternate-key files of this
primary file. For instructions on using the FUP LOADALTFILE command, see the File Utility
Program (FUP) Reference Manual.
•
Although you can specify the PARTONLY option, BACKUP backs up entire partitioned files
that have secondary partitions on remote systems (if you include the DP2FORMAT option).
•
For more information, see Backing Up or Converting DP1 and DP2 Files (page 76) .
DSLACK
The DSLACK option sets the minimum percentage of slack space in data blocks. It is used only
when converting key-sequenced Enscribe files between DP1 and DP2 format.
DSLACK percentage
percentage
is an integer in the range 0 through 99. The default value is 0.
EXT
The EXT option sets the extent sizes of the copy to be made on tape. Used only when converting
files between DP1 and DP2 format.
EXT { extent-size }
{ ( pri-extent-size, sec-extent-size ) }
NOTE: The use of extent sizes over 65535 requires format 2.
You can specify these values for
extent-size
,
pri-extent-size
(primary extent size), and
sec-extent-size
(secondary extent size):
BACKUP Options 53