Why are incorrect models listed for DASD Vols?

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Article ID: 17138

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Updated On:

Products

CA Vantage Storage Resource Manager

Issue/Introduction



Why are incorrect models listed for DASD Vols?

Environment

Release:
Component: CAIGMI

Resolution

These two PTFs correct the model numbers displayed with the proper device capacity.
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 APAR #: RO95664
  Title: INCORRECT 3390 DISK MODELS
 
PROBLEM DESCRIPTION:                                                   
Incorrect models of disk 3390 are displayed in many CA Vantage objects
 
SYMPTOM:                                                      
Without this fix CA Vantage displays the disk models as follows:
                                                              
     3390 disk model    number of cylinders                   
        1               <= 1113                               
        2               <= 2226                               
        3               <= 3339                               
        9               <= 10017                              
       27               <= 30051                              
       54               <= 60102                              
       81               >  65520                              
                                                                       
   M27, M54 and M81 are incorrect.                                               
   With this fix CA Vantage will display the disk models as follows:     
   Model Type (D,E,J,K,1,2,3,9,27,54,A)                              
 
   Since the Emulated devices today can have any number of cylinders,
   the value displayed for Model is based upon the number of emulated
   cylinders for the device, rather than a specific hardware device attribute.
                                                                     
     3390 disk model    number of cylinders                          
        1               = 1113                                       
        2               = 2226                                       
        3               = 3339                                       
        9               = 10017                                      
       27               = 32760                                      
       54               = 65520                                      
        A               = other capacity                             

   M27/M54 are aligned with IBM documentation as 32760 and 65520 .
  
   The number of cylinders is read from the UCB control block        
   (UCB DASD CLASS EXTENTION).                                       
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 APAR #: RO98113
  Title: MODEL A SPECIFIED IN THE VTOC/VVDS TABLE IS INCORRECT
 
PROBLEM DESCRIPTION:                                             
CA Vantage does not accept model type "A" correctly when it reads
the member VPVVDSSX and adds a new volume to storage group.      
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So, if you have both of these PTFs applied, everything will work properly
for the related device capacities.