Conditions That Do Not Disable Mirroring

SAP ASE disables a mirror only when it encounters an I/O error on a mirrored device.

For example, if SAP ASE tries to write to a bad block on the disk, the resulting error disables mirroring for the device. However, processing continues without interruption on the unaffected mirror.

Mirroring is not disabled when:

Disk mirroring is not designed to detect or prevent database corruption. Some of the scenarios described can cause corruption, so you should regularly run consistency checks such as dbcc checkalloc and dbcc checkdb on all databases.

Related concepts
Checking Database Consistency