Re: Tape utilization not logic

Ameerul, Steve is right. If you are using databases then all the null
blocks will be considered as no data and track of the same will be kept
rather than storing them too. This will help reduce the total size of the
database when being backed up. + whatever Steve has commented.

Dont worry, it'll get restored. TSM Wont let you down; unless if there is a
media failure. To get some confidence try restoring individual files.
I have had SAP R/3 on Oracle data of sizes of 500 GB, being backed up to a
Gen1 tapes and getting restored perfectly.  But at the same time my Lotus
notes databases never used to cross 170GB on the Gen1 tapes with
compression

Anoop

IBM Certified Specialist - AIX, Tivoli Storage Manager 5.2





             Steve Harris
             <Steve_Harris@HEA
             LTH.QLD.GOV.AU>                                            To
             Sent by: "ADSM:           ADSM-L AT VM.MARIST DOT EDU
             Dist Stor                                                  cc
             Manager"
             <[email protected]                                     Subject
             .EDU>                     Re: Tape utilization not logic


             14/09/2004 11:27


             Please respond to
             "ADSM: Dist Stor
                 Manager"






Ameerul,

Sometimes, if your data compresses well, you will get more on the tape than
you expect.
Conversely, sometimes, if the data doesn't compress well you will get less.

TSM just reports how much it has written.  You will be able to get it all
back.

Regards

Steve Harris
AIX and TSM Admin
Queensland Health, Brisbane Australia


>>> ameerul_msb AT YAHOO DOT COM 14/09/2004 15:47:21 >>>
Hi All,

Why is it the tape utilization (q vol) hits more than
400GB even though the tape can actually utilize about
400GB (compressed)? Why is this happening? Will the
data in the tape still recovarable?

Thanks and regards
Ameerul Madzali



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