Normally, when VSTORE verifies a compressed store media, it reads in each
record and decompresses it. This results in a thorough verification of
the media by checking both the integrity of the data on the media as well
as the correctness of the compression algorithm. If the NODECOMPRESS
option is specified, VSTORE will only read the records from the media. It
will not decompress them. This verifies only that there are no media
errors on the media. on the media. It also speeds up the VSTORE process,
since it does not have to perform the decompression.
This option should be used when the time to verify compressed store media
is a prime concern. In most cases, full verification should be done to
ensure that the data was compressed and written without error.
The NODECOMPRESS option can only be used with VSTORE, for example:
:FILE T;DEV=TAPE
:VSTORE *T;@.@.@;SHOW;NODECOMPRESS
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