1172.2 Auto Assignment FeatureIf the assigned controller is shut down, the auto assignment feature allows the controllernot assigned to access to any logical disk within the subsystem.Accordingly, this feature has no meaning if the cross call feature is set to ON.When an I/O on a logical disk not assigned to the local controller, it is checked whetherthe adjacent controller is shut down. If so, the assignment of logical disk to the shut downcontroller is released and the logical disk is reassigned to the local controller. Theassignment modification status is retained until the power is turned on again or theassignment is changed by the management software (NEC Storage Manager).See "Several Settings on Disk Array (Set of Auto Assignment Mode)" in "Guide toSetting of NEC Storage Manager Configuration" for the use of the management software(NEC Storage Manager).2.3 Cross Call FeatureThe disk array unit originally has the dynamic cross call feature.The feature may be made on or off.(1) Default state:Off(2) Cross call enable state:The cross call feature is set to ON.In the state, both controllers can access to every logical disk.(3) Modification method:The cross call feature can be set by using the management software.See "Several Settings on Disk Array (Set of Cross Call)" in "Guide to Settings ofNEC Storage Manager Configuration" for the use of the management software (NECStorage Manager).Note 1: It is recommended that the alternate path feature by middleware such as NECStorage PathManager is made valid from the viewpoint of data protection ifthe cross call feature is set to ON.Note 2: To use the access control feature, the cross call feature must be set to ON.
