I/O error occurred in OpenTP1 file system area aa...aa.

An I/O error occurred in the OpenTP1 file system management area.

aa...aa: Name of OpenTP1 file system area that contains OpenTP1 file system

S: Changes the management area to cover either side of the disk. If I/O error occurred in both sides, suspends processing being executed.

O: Contact the OpenTP1 administrator.

Countermeasure: Contact the maintenance personnel.