HP 3000 Manuals HP 3000 Manuals
Running a Histogram
You can enter any of the following commands to invoke the DISCFREE
utility:
* DISCFREE
* RUN DISCFREE.PUB.SYS;INFO="[format][,ldev]"
* DISCFREE <format>
Format values include the following:
A A histogram showing numbers of blocks by size categories.
B Shows transient and free space allocations in sectors.
C Shows transient and free space allocations in percentage of
total device capacity.
D Shows disk allocation summary in sectors.
E Shows disk allocation summary in percentage of total space.
The DISCFREE utility provides five types of reports:
* Histogram
* Allocation
* Allocation format 2
* Summary
* Summary format 2
When monitoring your disk space, you enter the following:
DISCFREE Return
The system responds with a copyright statement and the following
question:
___________________________________________________________________________________
| |
| |
| DISCFREE A.01.02 Copyright (C) Hewlett-Packard 1989. All rights reserved. |
| TUE, FEB 13, 1990, 3:02 PM |
| |
| Syntax is: DISCFREE [<format>][,<ldev>] |
| |
| Where <format> is one of the following: |
| A, HISTOGRAM, 1: to see a histogram. |
| B, ALLOCATION, 2: to see disc allocation. |
| C, ALLOCATION2, 3: to see disc allocation format 2. |
| D, SUMMARY, 4: to see disc allocation summary. |
| E, SUMMARY2, 5: to see disc allocation summary format 2. |
| |
| Where <ldev> is the logical device number of a disc. |
| |
| Enter [<format>][,<ldev>] :_ |
| |
___________________________________________________________________________________
To skip the copyright statement and the above question, enter a format
value with the command as follows:
DISCFREE A
If you select A, you have chosen to look at a histogram. You would
choose histogram if you need to see the distribution of disk space with
blocks of contiguous space (blank sectors that are adjacent to each
other). The histogram groups these blank sectors according to size.
After entering the above command, the system displays:
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| |
| |
| LDEV : 1 -- (MPEXL_SYSTEM_VOLUME_SET:MEMBER1) |
| |
| LARGEST FREE AREA: 527984 TOTAL FREE SPACE: 546784 |
| |
| 0 BLOCK(S) OF 1- 9 CONTIGUOUS SECTORS = 0 FREE SECTORS. 0% |
| 19 BLOCK(S) OF 10- 99 CONTIGUOUS SECTORS = 704 FREE SECTORS. 0% |
| 7 BLOCK(S) OF 100- 999 CONTIGUOUS SECTORS = 1856 FREE SECTORS. 0% |
| 8 BLOCK(S) OF 1000- 9999 CONTIGUOUS SECTORS = 16240 FREE SECTORS. 3% |
| 0 BLOCK(S) OF 10000- 99999 CONTIGUOUS SECTORS = 0 FREE SECTORS. 0% |
| 1 BLOCK(S) OF 100000-AND UP CONTIGUOUS SECTORS = 527984 FREE SECTORS. 97% |
| |
| ------------------------------------------------------------------------------- |
| LDEV : 2 -- (MPEXL_SYSTEM_VOLUME_SET:MEMBER2) |
| |
| LARGEST FREE AREA: 1115936 TOTAL FREE SPACE: 1177824 |
| |
| 0 BLOCK(S) OF 1- 9 CONTIGUOUS SECTORS = 0 FREE SECTORS. 0% |
| 19 BLOCK(S) OF 10- 99 CONTIGUOUS SECTORS = 944 FREE SECTORS. 0% |
| 17 BLOCK(S) OF 100- 999 CONTIGUOUS SECTORS = 5328 FREE SECTORS. 0% |
| 3 BLOCK(S) OF 1000- 9999 CONTIGUOUS SECTORS = 8800 FREE SECTORS. 1% |
| 2 BLOCK(S) OF 10000- 99999 CONTIGUOUS SECTORS = 46816 FREE SECTORS. 4% |
| 1 BLOCK(S) OF 100000-AND UP CONTIGUOUS SECTORS = 1115936 FREE SECTORS. 95% |
| |
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Starting with LDEV 1, the computer tells you how much free contiguous
disk space it finds. Pay close attention to the free space available on
system domain disk drives. Your computer uses these for spoolfile
storage. For example:
* First, look at the first column of data. If you see most of the
blocks of free space is in the smaller sizes (1-9 or 10-99), there is
a good chance that whatever space is available is divided into small
fragments. This makes creating files difficult, if not impossible.
* Second, look at the number next to FREE SECTORS. If this number is
small, you are running out of space to create any file, including
spoolfiles.