Setting the sysparm CARTCALC to the value N or allowing it to use the default value N, turns off the query to the device for the device capacity. This causes the value in the sysparm CARTFEET to be used to set the cartridge capacity. Having sysparm CARTCALC set to N can cause under-utilization of tape cartridges. It may also cause unnecessary I/Os to be performed on a tape if the calculated capacity is greater than the actual capacity, because an attempt may be made to fit a data set that is too large for the remaining tape space by wasting time and resources. This exception will be cleared when this check runs again after the job causing the exception is changed and runs, or after the job statistics are older than the number of days specified in the AGE parameter for this health check. The default value for the sysparm CARTCALC will be changed to Y with the next release of CA Disk.
Set the sysparm CARTCALC to Y to get the best utilization of the tape device by using the least number of resources. This means a higher utilization for each cartridge regardless of type. A tape library with mixed capacity tapes or with high capacity tapes must have CARTCALC specified as Y, else cartridges will be underutilized.
AGE(7)
Yes
Yes
For more information, see the Systems Guide.
ADSH0011E SYSPARM CARTCALC is set to N while using a tape cartridge device.
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