Tape Formats; Tape Format History; History And Attributes Of Tape Formats - HP BACKCOPY Reference Manual

A format 2 file is either a large format file, or a file that can contain larger partitions than a file
created on RVUs preceding G06.00 or D46.00. A format 2 file has the potential of exceeding
the 2 GB - 1 MB size limit of a format 1 file.
For more information about handling format 1 and format 2 files, see the File Utility Program (FUP)
Reference Manual.

Tape Formats

A tape used with the BACKCOPY, BACKUP, or RESTORE utilities can have one of the different
tape formats listed in
on a tape with that particular format, the BACKUP option that can cause that type of files to be
stored on the tape, and the version of the RESTORE utility that recognizes that particular tape
format. Multiple tape formats exist because of continuing improvements in disk and tape processing.
Table 3 Tape Formats
Tape
Format Files
0 DP1 files only
1 DP1 files only
2 DP2 files, or file sets with both DP2
and DP1 files
3 Archive tape format for parallel
copies, labeled tapes, SQL
objects, and DP2 files

Tape Format History

The history of the various tape formats and their associated attributes are summarized in
which identifies the NonStop software version in which these attributes were introduced.
Table 4 History and Attributes of Tape Formats
Associated Attributes
Software version in
which tape format was
introduced
Disk process
Record size
Checksums and
sequence numbers per
record
Compatible RESTORE
versions
Compatible between
NonStop and
NonStop 1+
1
Carried over from NonStop 1+ (unchanged)
2
To accommodate large block size and checksums
3
To accommodate DP2 files
4
To facilitate labeled tapes, and parallel copies, and SQL objects
5
If the input files are DP1 files or the DP1FORMAT option is specified, tape format 1 is used.
Table 3. The format includes the tape format number, the type of files stored
BACKUP Option
OLDFORMAT (no longer
supported)
DP1FORMAT
DP2FORMAT
ARCHIVEFORMAT
1
Tape Format 0 Tape Format 1
A01 NonStop 1+ A04 NonStop 1+
DP1 DP1 only
2048 bytes Up to 30 KB
No Yes
A01 to B40 A04 to B40
Yes Yes, only if
BLOCKSIZE=2
RESTORE Version
A01 to B40
A04 to B40
B00 or later
C00 or later
2 3
Tape Format 2
B00 NonStop II
5
DP1
6
DP2
7
Up to 30 KB
Yes
B00 or later
No
Using BACKCOPY, BACKUP, and RESTORE
Table 4,
4
Tape Format 3
C00 NonStop II
DP2
7
Up to 30 KB
Yes
C00 or later
No
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