Method of verifying integrity of data written by a mainframe to a virtual tape and providing feedback of errors

摘要

A virtual tape emulator (VTE) that performs data integrity read back verification at host sync points. The VTE first flushes data that it may have buffered to a backend storage subsystem such as a disk array. The VTE then reads all data that was written to the backend storage array between a prior sync point and the current sync point. During this feedback verification, integrity checks can be performed. An error detected during read back verification is returned to the host operation that triggered the sync operation.

主权项

1. A method comprising:
emulating operations of a virtual tape system to a mainframe processor; forwarding data received from the mainframe processor for storage by a backend storage subsystem; receiving a sync point indication from the mainframe; in response to receiving the sync point indication;
storing information concerning a sync point;flushing data to the backend storage subsystem not yet forwarded; andperforming data integrity read back verification of data using the sync point information.