System Parameters

'VW'=

Verify Write

Description

Verifies all data file writes by re-reading after a write to check data integrity. The value set in 'VW' defines the number of retries before a data write error is generated.

Note:
'VW' 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 writes verified
TCB(65) - Number of writes mis-compares

Default

'VW'=0

See Also

TCB( ) Return Task Information