Storage control device and storage system

摘要

The present invention enables to update a program in a storage control device (1) while processing access requests, without imposing any burden on a host (5). When execution of updating of a program is commanded from a management terminal (6), an update control unit (8) starts within the controller (2A) which is the object of updating. After a host I/F unit (2A1) has been connected to an access request processing unit (2B3) within another controller (2B) by a connection control unit (7), the update control unit (8) updates a program which is stored in a program memory (2A4) or a boot disk. When this updating is completed, the update control unit (8) reconnects the host I/F unit (2A1) to its access processing unit (2A3) by the connection control unit. Since the stored contents of data memories (2A5, 2B5) are synchronized, the other access request processing unit can continue processing access requests from the host in place one access request processing unit.