HP BACKCOPY Reference Manual page 84

NOTE: To ensure compatibility with low-level system interfaces, the version of DCOM must match
the version of the NonStop operating system. The D42 version of DCOM does not run on any
earlier versions of the operating system. All older D-series versions of DCOM run only on versions
of the operating system prior to D42.
The DCOM command syntax is:
[ run ] [ \node.]DCOM / run-options /
[ $volume | HELP ] [, options ]
[, IGNOREBADSECTORS
[, MAXMOVES n
[, VERIFY
[, WORKFILE volume
node
is a name of the local or remote node (system) where DCOM runs. If you want to run DCOM
on a remote node in a network, the utility must be secured on the remote node for network
access. A remote password for nodemust exist for any user that is logged on to the local node
where the DCOM RUN command is issued.
If node is not specified, DCOM runs on the local node where the command interpreter is
running. (This is usually the node that is connected to your terminal.)
run-option
is any option for the TACL RUN command. The two most common run-options are:
IN filename
OUT listfile
The IN option specifies the input files, and the OUT option specifies the output files. These files
usually override the home terminal as the input or output device. An IN file is a text file that
contains the remainder of the command line, including parameters and options. For a complete
list of run-options, see the description of the TACL RUN command in the TACL Reference
Manual.
volume
specifies the disk volume where the compression is to be performed. The volume specified must
reside on the node where DCOM will run. The volume can contain Enscribe, SQL,
Kernel-Managed Swap Facility (KMSF) and SMF files. Optional keywords and parameters can
follow the volume specification in any order.
If you omit volume, a brief description of DCOM and its options is displayed (identical to the
display you receive after specifying HELP).
HELP
displays a brief description of DCOM and its options.
IGNOREBADSECTORS
specifies that DCOM is to perform the disk compression even if it detects unspared defective
sectors on the disk during the initial analysis. Without this option, DCOM terminates when it
detects unspared defective sectors and displays:
Please eliminate bad sectors using the PUP SPARE command.
MAXMOVES n
limits the total number of extents that DCOM can move during any one compression. By using
this option, you can compress a heavily fragmented disk in several steps and limit processing
time. This is helpful if you need to run DCOM when others are using the system. Allowable
values are in the range 1 through 32,767. The default limit is 32,767.
84 Disk Compression (DCOM)
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