Dcom Utility; Dsap Report Samples - HP BACKCOPY Reference Manual

DCOM
The Disk Compression (DCOM) utility compresses the space used by disk files. DCOM moves
allocated file extents (areas reserved for the growth of designated files) and free-space extents
(unallocated areas) to different locations on a disk volume. DCOM consolidates the free-space
extents, making larger extents available. After using DCOM to compress disk space, you can
allocate new files with larger extent sizes.
DCOM is for use by programmers, system operators, and system managers.
Figure 3 DCOM Utility
DSAP
The Disk Space Analysis Program (DSAP) analyzes how the space on a disk volume is being used.
You can use DSAP to determine how many free-space pages, allocated pages, deallocatable extent
pages, and unused pages are on a disk. A page is a 2048-byte block of disk space.
DSAP/DCOM have a DSAPCSTM file to customize the DSAP environment. You can specify any
DSAP options in the DSAPCSTM file. DSAP options specified in the DSAPCSTM file are appended
to the DSAP command that you enter at the TACL prompt. For more information on these features,
see DSAPCSTM File (page
You can receive DSAP output in several different report formats that analyze the disk differently.
Table 2 DSAP Report Samples
Report
Subvol Summary Report
User Summary Report
Detail Report
Summary of Space Use Report
Short Report
Tabular Report
26 Disk and Tape Utilities Overview
115).
Description
Analyzes the space used by each subvolume on a disk.
Analyzes the space used by each user who owns files on the disk.
Lists the file name and space used by each file on the disk.
Provides a general summary of how space is used on the disk.
Shows the name, mirrored volume, volume capacity, volume free space,
free-space fragments, and largest free-space fragment for each volume selected.
Formats the output for different DSAP options by arranging the data in columns.
The report can be directly ported to any popular spreadsheet program.