Non-Retentive Data Identifier (NRDID)
Original Publication Date: 1989-Feb-01
Included in the Prior Art Database: 2005-Jan-29
A cached DASD (Direct Access Storage Device) subsystem may, to improve performance on write operations, allow write operations to cache without concurrently updating a non-volatile storage (DASD or Non-volatile Storage). A cache failure causes the status of that data to be unknown and the user must be notified that his data may be lost. The notification should only be given to users of Non-Retentive Data. The NRDID provides the means of providing this notification.