Did you create  your file system large file enabled?

Orville L. Lantto
Datatrend Technologies, Inc.  (http://www.datatrend.com)
IBM Premier Business Partner
121 Cheshire Lane, Suite 700
Minnetonka, MN 55305
Email: Orville.Lantto AT datatrend DOT com


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Roger Deschner <rogerd AT UIC DOT EDU>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
02/20/2003 12:18 PM
Please respond to "ADSM: Dist Stor Manager"


        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:
        Subject:        DSMFMT space calculation mystery


I've got a problem of not having the right mathematical formula. My
problem is that, when planning a new TSM data space for Log, Database,
or disk storage pool volume, I cannot figure out the maximum
size I can allocate. I'm using AIX 4.3.3.ML9 with TSM 4.2.2.8.

Step 1) Use the OS to create a Unix file system of the appropriate size
and characteristics. The Unix "df -k" command (allegedly) tells me how
big it is and how much space is in it:

Filesystem    1024-blocks      Free %Used    Iused %Iused Mounted on
/dev/kumquat      8781824   3008300   66%       18     1%
/usr/local/kumquat

Step 2) Format it. The following calculations are from "TSM
Administrator's Reference". 3008300k/1024=2937m Rounding down to a
multiple of 4mb gives you 2936m. Adding 1 for overhead gives you 2937m.
However, specifying

dsmfmt -m -db /usr/local/kumquat/db12 2937

It formats for a long time and then abends with message:

Error writing file /usr/local/kumquat/db12, errno = 28

...which means, not enough space.

Where are my calculations going wrong? I can try to reduce the number a
few mb at a time and figure this out by trial and error, but this takes
literally DAYS of my time. So I usually guess at 98% and waste some
space. How can I really calculate this?

Roger Deschner      University of Illinois at Chicago     rogerd AT uic DOT edu
============ "The World's Least Intuitive Operating System" ============
=============== -- from the cover of "Unix for Dummies" ================