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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
Table 3
. The format includes the tape format number, the type of files stored
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
RESTORE Version
BACKUP Option
Files
Tape
Format
A01 to B40
OLDFORMAT (no longer
supported)
DP1 files only
0
A04 to B40
DP1FORMAT
DP1 files only
1
B00 or later
DP2FORMAT
DP2 files, or file sets with both DP2
and DP1 files
2
C00 or later
ARCHIVEFORMAT
Archive tape format for parallel
copies, labeled tapes, SQL
objects, and DP2 files
3
Tape Format History
The history of the various tape formats and their associated attributes are summarized in
Table 4
,
which identifies the NonStop software version in which these attributes were introduced.
Table 4 History and Attributes of Tape Formats
Tape Format 3
4
Tape Format 2
3
Tape Format 1
2
Tape Format 0
1
Associated Attributes
C00 NonStop II
B00 NonStop II
A04 NonStop 1+
A01 NonStop 1+
Software version in
which tape format was
introduced
DP2
DP1
5
DP1 only
DP1
Disk process
DP2
6
Up to 30 KB
7
Up to 30 KB
7
Up to 30 KB
2048 bytes
Record size
Yes
Yes
Yes
No
Checksums and
sequence numbers per
record
C00 or later
B00 or later
A04 to B40
A01 to B40
Compatible RESTORE
versions
No
No
Yes, only if
BLOCKSIZE=2
Yes
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.
Using BACKCOPY, BACKUP, and RESTORE
31