System Parameters
'VR'= Verify Read
 
Description Verifies all data file reads by re-reading and comparing. The values set in 'VR' define the number of retries before a data read error is generated.


*Note* 'VR' can be helpful in tracking down hardware-related data corruption problems.


(There is some impact on system performance.) TCB( ) returns the following values for this parameter:
TCB(63)- Number of reads verified
TCB(65)- Number of reads mis-compares.
 
Default 'VR'=0
 
See Also TCB( ) Return Task Information.