The Question is:
I am getting errouneous information reported when I check a certain disk (2
RA90 disks shadowed), for space.
Total blocks available is 2376153
Total blocks being used 2290152
Total blocks shown free 86001
However, when I type
the response is:
Grand total of 3 directories, 21 files, 2262547/2290152 blocks.
Why am I missing 373,571 blocks?
The Answer is :
The SHOW DEVICE command displays information from a cache containing
the free space values from the volume. This cache can potentially
become skewed from the actual disk volume values, and for various
On all recent OpenVMS versions, you can use the DCL command
SET VOLUME/REBUILD=FORCE to rebuild the volume and to reset the
cache containing the free block count stored in the volume's
lock value block.
ANALYZE/DISK/REPAIR and a DISMOUNT and MOUNT can also be used
to reload the cache with the current (actual) value.
Please consider upgrading your OpenVMS VAX version, and please
also consider moving to newer storage devices and technologies.
The DIRECTORY command can also display values differing from
actual use, as the DIRECTORY command does not account for the
use of aliases. A DIRECTORY of a system disk in particular
will display usage larger than actual, because the command will
count the contents of the common directories once for each system
root and once for the common root itself.