I always use compression at the drive level.   No need to have the client doing 
all that work.  However, if you have particularly slow network connections, 
client compression might be useful.
 


Gary Lee
Senior System Programmer
Ball State University
phone: 765-285-1310

 
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Botelho, Tiago (External)
Sent: Thursday, January 19, 2012 4:57 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] LTO4 Tape Volumes with diferent Estimated Capacity

Hello all

Thank you for your all answers.

Regarding to your experience what is more efficiency regarding to tape
usage capacity (increase tape amount of data stored)? Compression on
client or compression on Drive(HW)? 


Cumprimentos / Best regards 

Tiago Botelho


-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Botelho, Tiago (External)
Sent: quarta-feira, 18 de Janeiro de 2012 15:27
To: ADSM-L AT VM.MARIST DOT EDU
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