Checksum; Checksum Guidelines - HP T6553 D45 Reference Manual

FUP Commands

CHECKSUM

Recomputes the checksum value for blocks of data in disk files. Use this command
when recovering from a software-detected checksum error.
CHECKSUM fileset-list [ , PARTONLY ]
fileset-list
is a list of files whose checksum values are to be recomputed. fileset-list can
include Enscribe files (structured or unstructured) and SQL files. You can specify
qualified-fileset for fileset-list.
Any SQL views (protection or shorthand) in fileset-list are ignored, and a
warning is issued.
PARTONLY
specifies that FUP is to compute checksum values for all the primary and
secondary partitions encountered in fileset-list and for all nonpartitioned
files. If a primary partition name is referenced, the secondary partitions of the file
are not checksummed.

CHECKSUM Guidelines


Although CHECKSUM reads each block of data (from each file specified by
fileset-list) and recomputes a checksum value for each one, it rewrites only
blocks whose checksum values are incorrect.

Checksum errors usually indicate a potential data integrity problem. CHECKSUM
recomputes the checksum value for blocks of data but does not fix any data that
might have changed.

If a Peripheral Utility Program (PUP) DOWN or STOPOPENS command was
executed for the volume named in fileset-list, CHECKSUM aborts.

If an open file or SQL view is encountered during processing, CHECKSUM skips it,
and a warning message appears.

If the fileset-list includes an asterisk (*) to specify all files in the file set, and
if the PARTONLY option has not been specified, CHECKSUM skips secondary
partitions of partitioned files (Enscribe and SQL).

CHECKSUM accepts SQL catalogs but not SQL views.

The maximum number of files in the fileset-list that can be checksummed at a time
is 2,147,483,647.
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CHECKSUM