Disk Mirroring

At the beginning of a load, the SAP ASE server passes Backup Server the primary device name of each logical database and log device. If the primary device has been unmirrored, the SAP ASE server passes the name of the secondary device instead. If any named device fails before Backup Server completes its data transfer, the SAP ASE server aborts the load.

If you attempt to unmirror any named device while a load database is in progress, the SAP ASE server displays a message. The user executing disk unmirror can abort the load or defer the disk unmirror until after the load completes.

Backup Server loads the data onto the primary device, then load database copies it to the secondary device. load database takes longer to complete if any database device is mirrored.