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CCSS Seeks to Reduce iSeries Disk Dramas
by Alex Woodie
Keeping customers free of iSeries disk crises is the focus of the latest software release from CCSS, the English OS/400 systems management software vendor that
sells QSystem Monitor, QMessage Monitor, and QRemote Control. CCSS recently announced that it has
enhanced QSystem Monitor with a new disk usage inquiry command that gives iSeries operators a snapshot
of how the system is using its disks and helps to identify potential problems before they take a dramatic
turn.
For the average OS/400 shop, it is important to keep about 20 percent of total disk capacity in the server
available for the server to use to store temporary files that OS/400 and its systems programs use as they are
running. One of the easiest ways to crash an application is to ignore how much of the iSeries disk it is using.
Even if an iSeries operator detects a potentially fatal increase in disk capacity utilization, it can be a tricky
matter to fix the problem before it crashes the system. This is because finding which jobs are responsible for
the increase is difficult, and finding which specific objects within that job are running amok is even harder.
Now CCSS is providing a way for iSeries operators to glean important disk utilization information without
having to cross-reference the results of existing utilities the shop might have. The new disk usage inquiry
command in CCSS's QSystem Monitor, MONDSKINQ, allows operators to interrogate the list of objects in
use by an application, and to sort the results using filters, in order to find which objects are affecting system
performance.
In the event of an auxiliary storage pool overflow, for example, the operator would be able to use the
MONDSKINQ command to pull up a list of objects that have been affected by the overflow, paving the way
for a speedier recovery. The iSeries operators can also use this new command to keep disk utilization from
overflowing in the first place. The filtering options available with MONDSKINQ can also be used to
identify how much disk space is being used to store deleted records, old files, and damaged objects, and
where they are located. This information could be used for a number of different maintenance tasks, such as
the OS/400 command Reclaim Storage.
MONDSKINQ works with the disk summary module, a part of QSystem Monitor that displays graphical
representations of disk space usage by a number of different factors, including which application uses it and
when it was last used. Whereas the disk summary module displays its information graphically, the
MONDSKINQ command is run from the green-screen console.
For more information, visit www.ccssltd.com.
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