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To invoke DISCFREE enter:
DISCFREE
RUN DISCFREE.PUB.SYS;INFO="[format][,ldev]"
DISCFREE "[format][,ldev]"
where
- format
is the specified display type. The format default is
A.
- ldev
specifies a particular system volume. The ldev default
is no ldev, causing all volumes to be displayed.
If you do not specify either of the parameters, DISCFREE prompts for
them. If you enter format but not ldev,
DISCFREE reports on all logical disk devices. To report
on a particular volume, enter the name of the volume set. For example,
to display information about the volume USER_VOL_SET, you would enter:
RUN DISCFREE.PUB.SYS;INFO=",,USER_VOL_SET"
The format values you can specify are:
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. |
Displaying the histogram
To display a histogram for ldev 1 only enter:
DISCFREE "A,1"
To display the histogram for all disk devices enter:
DISCFREE "A"
Or, you may enter the DISCFREE command (without any options) and, at
the prompt, enter only the format and ldev or only the format. For example:
Enter [<format>][,<ldev>] : "A,1"
Enter [<format>][,<ldev>] : "A"
Displaying the allocation summary
To display the allocation summary as a percent of total space
on all logical disk devices, enter:
DISCFREE "C"
If you omit quotation marks, the default is the specified format for
all devices.
DISCFREE displays the following information:
DEVICE SIZE | The capacity, in sectors, of the device. |
TRANS SPACE | The number of sectors currently allocated for
transient space. Transient space is used for objects which are not
permanent files, such as stacks, heaps and system tables. |
MAX TRANS SPACE | An upper limit on the number of sectors that
may be allocated for transient space. TRANS SPACE should
not exceed this number although it may if
the percentage of MAX TRANS SPACE space is lowered using
VOLUTIL. |
FREE SPACE | The amount of space on a device currently
not used for transient or permanent space. Space available
for use. |
AVAIL TO TRANS SPACE | The amount of space on the device
currently available for use as transient space. The difference between MAX
TRANS SPACE and TRANS SPACE. If this difference exceeds the amount of FREE
SPACE, DISCFREE displays the amount of FREE SPACE. |
PERM SPACE | The number of sectors currently allocated for
permanent space. User and system files use permanent space. |
MAX PERM SPACE | An upper limit on the number of sectors that may
be allocated for permanent space. PERM SPACE should not
exceed this number although it may if the percentage of MAX
PERM SPACE space is lowered using VOLUTIL, or if enough space is
consumed by files brought in during an UPDATE. |
AVAIL TO PERM SPACE | The amount of space on the device currently
available for use as permanent space. The difference between MAX PERM SPACE
and PERM SPACE. |
AVAIL TO TRANS SPACE and AVAIL TO PERM SPACE may be negative
values. For example, if TRANS SPACE exceeded MAX
TRANS SPACE, AVAIL TO TRANS SPACE would be negative. This could
occur if VOLUTIL were used to change the maximum percentage of
MAX TRANS SPACE to a level lower than currently used for TRANS SPACE.
Also, if enough permanent space is used by files brought in during
an UPDATE, PERM SPACE may exceed MAX PERM SPACE, which would make
AVAIL TO PERM SPACE a negative number.
Additional Discussion
For more information on the general topic of disk volumes refer to Volume
Management Reference Manual. For more information on the DSTAT
command refer to MPE/iX Commands Reference Manual.
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