When the tape is "Filling"  , it will use the value in the device class
for estimated capacity.
Once the tape is marked Full, it will change to the actual amount of data
on the tape (before compression) since it doesn't need to estimate anymore

The different numbers are the result of some tapes having more
compressible data than the others.

Regards,
Shawn
________________________________________________
Shawn Drew





Internet
Tiago.Botelho AT VOLKSWAGEN DOT PT

Sent by: ADSM-L AT VM.MARIST DOT EDU
01/18/2012 10:27 AM
Please respond to
ADSM-L AT VM.MARIST DOT EDU


To
ADSM-L
cc

Subject
[ADSM-L] LTO4 Tape Volumes with diferent Estimated Capacity








Hello



I have several tape volumes (LTO4) with different Estimated Capacity.
What can cause this situation?



Ex:

A00035L4                     WIN_SRV_T       TS3310           629.5 G
95.4       Full

A00039L4                     WIN_SRV_T       TS3310             1.1 T
98.2       Full

A00101L4                     WIN_SRV_T       TS3310           884.8 G
84.4       Full

A00113L4                     WIN_SRV_T       TS3310             1.0 T
93.7       Full

A00118L4                     WIN_SRV_T       TS3310             1.0 T
73.6       Full

A00128L4                     WIN_SRV_T       TS3310             1.0 T
99.2       Full

A00129L4                     WIN_SRV_T       TS3310           969.1 G
93.7       Full

A00133L4                     WIN_SRV_T       TS3310           934.8 G
96.1       Full





All tapes and Drives are LTO4, TSM Server 553 for AIX.



The devc are configured as:



Device Class Name: TS3310

        Device Access Strategy: Sequential

            Storage Pool Count: 16

                   Device Type: LTO

                        Format: ULTRIUM4C

         Est/Max Capacity (MB):

                   Mount Limit: DRIVES

              Mount Wait (min): 60

         Mount Retention (min): 60

                  Label Prefix: ADSM

                       Library: TS3310

                     Directory:

                   Server Name:

                  Retry Period:

                Retry Interval:

                        Shared:

            High-level Address:

              Minimum Capacity:

                          WORM: No

              Drive Encryption: Off

               Scaled Capacity:

Last Update by (administrator): ADM

         Last Update Date/Time: 07/27/09   17:32:05



Cumprimentos / Best regards

Tiago Botelho







This message and any attachments (the "message") is intended solely for
the addressees and is confidential. If you receive this message in error,
please delete it and immediately notify the sender. Any use not in accord
with its purpose, any dissemination or disclosure, either whole or partial,
is prohibited except formal approval. The internet can not guarantee the
integrity of this message. BNP PARIBAS (and its subsidiaries) shall (will)
not therefore be liable for the message if modified. Please note that certain
functions and services for BNP Paribas may be performed by BNP Paribas RCC, Inc.