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HSM TTOC Warnings

 
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Paul Voyner

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Joined: 26 Nov 2012
Posts: 51
Location: Switz

PostPosted: Fri Apr 11, 2014 7:32 pm    Post subject: HSM TTOC Warnings
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Hi,
I'm at a customer which uses Mainstar to audit HSM, and one of the issues thown up by the regular auditing is a number of 1124W VALID BLOCK COUNT IN TTOC DOES NOT AGREE warnings.

This seems to mean that the block count recorded in the Extension 0000 record does not agree with the sum of all extension records for that tape.

Does anyone know what this signifies ? How might this situation occur, and does it matter ?
Ta
Paul
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jan.sehlbach

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Joined: 28 Mar 2014
Posts: 3
Location: Germany

PostPosted: Tue Apr 15, 2014 1:53 pm    Post subject:
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I don't know the program Mainstar, and i don't how it occur.

But i would try the HSM AUDIT MEDIACONTROLS VOLUMES Command on the corresponding Volumes.
Maybe you can it repair with fixcds with the audit error.
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Rohit Umarjikar

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Joined: 21 Sep 2010
Posts: 1610
Location: NY,USA

PostPosted: Wed Apr 16, 2014 5:53 am    Post subject:
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You may try,

https://pic.dhe.ibm.com/infocenter/tivihelp/v3r1/index.jsp?topic=%2Fcom.ibm.aad.doc%2Fakd_uref_fixcrossref.html

Also,

To view the list of available fixes, type F next to the error message and press Enter. The Fast Audit Fix Plan Member List

Code:
<V6 R1.01>                                                          Row 1 of 4
           FAST AUDIT FIX PLAN MEMBER LIST                                     
 OPTION ===>                                                    SCROLL==> PAGE 
  YOU MAY BROWSE (B), EDIT (E), FIX (F) OR VIEW (V) RESULTS                     
 COMMAND  MEMBER   ACTION           TITLE                                       
          F1124WA         HSA DISPLAY DUMP OF TTOC WITH MISS MATCH VALID BLOCKS
          F1124WB         HSM FIXCDS PATCH T FOR VOL WITH MIS MATCH BLOCK COUNT
          F1124WC         HSM AUDIT DIRCTL FOR MISS MATCH BLOCK COUNT

You can perform additional diagnostics on the errors using fixes F1124WA. Tape
errors like these can be corrected by executing fix F1124WC, executing the
DFSMShsm command AUDIT DIRECTORYCONTROLS to update the CDS.
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Paul Voyner

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Joined: 26 Nov 2012
Posts: 51
Location: Switz

PostPosted: Wed Apr 16, 2014 12:11 pm    Post subject:
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Thanks for the feedback guys.

The thing which interests me most is not how to fix it, but why it happens. What causes these counts to get out of sync?. Our storage people reported this as a recurring problem, and I'm trying to understand it better.
The fact that HSM provides audit facilities to fix it, suggests that it's not so unusual. Thanks.
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Pete Wilson

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Joined: 31 Dec 2009
Posts: 437
Location: London

PostPosted: Thu Jul 24, 2014 12:00 am    Post subject:
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Does your DFHSM stc get cancelled or abend sometimes? That can cause this sort of issue.
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Paul Voyner

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Location: Switz

PostPosted: Thu Jul 24, 2014 12:17 pm    Post subject:
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Hi Pete. That could well be the reason, though it would take a lot of syslog trawling to verify it.
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