Oracle® Secure Backup Reference Release 10.1 Part Number B14236-03 |
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Purpose
Use the obcopy
tool to copy one tape volume to another. Copying starts at the beginning of the input tape and terminates when the input drive reports blank tape (end of media). It is possible for the volumes to be different media types. For example, you can copy an 8mm tape to a 4mm tape.
Usage Notes
Note the following aspects of obcopy
usage:
The obcopy
utility does not handle volume overflow conditions. Therefore, you are responsible for ensuring that the input volume or the selected portions of the volume fit on the second volume.
By default, the compression mode of the output is the same as the mode of the input, assuming that the output device supports the compression format of the input device. You can use the -c
and -u
options to force the output to be compressed or uncompressed.
Use the -v
option if the input contains a file of with varying internal block sizes.
The obtar
utility does not write blocks of different sizes to a single file. On the remote chance that a file to be copied does contain varying block sizes, however, obcopy
provides the -v
option to accommodate such unusual circumstances.
For both copy and verify operations, obcopy
rewinds tapes before starting unless -s
or -t
is specified. Final disposition depends on whether the rewind or no rewind versions of the drives are being used.
Syntax
etc/obcopy [ -c ] [ -e ] [ -n cnt ] [ -f ] [ -s ] [ -t ] [ -u ] [ -v ] [ -V ] [ -h | ? ] input_device output_device
Semantics
Compresses output even if input is not compressed. If the output device does not support compression, obcopy
issues a warning and does not compress the output.
Performs a byte-by-byte comparison of the contents of the input and output tapes to determine whether the data is the same. No copy is performed.
Copies at most cnt
files from the source tape.
Defaults to disk file if a device name is not found.
Does not rewind input_dev
before starting copy.
Does not rewind input_dev
before starting copy.
Uncompresses output even if input is compressed.
Specifies an input file with varying internal block sizes. Normally, obcopy
redetermines the block size after reading a filemark. In other words, obcopy
assumes that all blocks in a file (the data between two filemarks) are the same size. Specify -v
only if the block size changes between files.
Prints the obcopy
version.
Prints full help.
Specifies the device containing tape to be copied from.
Specifies the device containing tape to be copied to.
Example
Example 5-8 uses obtool
to show that library lib1
has a tape containing data loaded in its drive and library lib2
has a blank tape loaded in its drive.
Example 5-8 Displaying Volumes in Two Libraries
ob> lsdev library lib1 in service drive 1 tape1 in service library lib2 in service drive 1 tape2 in service ob> lsvol --library lib1 --long Inventory of library lib1: in mte: vacant in 1: volume RMAN-DEFAULT-000002, barcode ADE202, oid 111, 8087104 kb remaining, content manages reuse in 2: volume VOL000002, barcode ADE201, oid 108, 8029472 kb remaining in 3: vacant in 4: vacant in dte: volume VOL000003, barcode ADE203, oid 114, 8083360 kb remaining, lastse 4 ob> lsvol --library lib2 --long Inventory of library lib2: in mte: vacant in 1: volume VOL000004, barcode DEV423, oid 118, 8079520 kb remaining in 2: volume RMAN-DEFAULT-000003, barcode DEV424, oid 120, 8078656 kb remaining, content manages reuse in 3: vacant in 4: vacant in iee1: vacant in iee2: vacant in iee3: vacant in dte: unlabeled, barcode DEV425, oid 121, lastse 3 ob> quit
Example 5-9 uses obcopy to copy the data from the tape in the tape1
drive to the tape in the tape2
drive.