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AssigneeFujitsu Limited
InventorsMasahiro Yoshida, Takeshi Obata, Taichi Oono
Estimating the term…
A storage system have a plurality of control modules which control a plurality of disk storage devices. In order to read/write system information even when problems arise in paths with the plurality of disk devices, and moreover to output log data even upon occurrence of an abnormality in the control module, a plurality of control modules which control a plurality of disk storage devices, each have a built-in system disk device unit which stores log data. In equalization processing, log data of one control module is stored in a system disk of another installed control module. Even when an abnormality occurs in the one control module, log data of the one control module can be output by the other control module.
A data storage system comprising:
A log data equalization control method for a storage control apparatus, having a plurality of control modules connected to a plurality of disk storage devices which store data and which control access to said disk storage devices according to access instructions from a higher-level system, each of said control modules having memory with a cache area which stores a portion of the data stored by said disk storage devices, a control unit which performs said access control, a first interface unit which controls the interface-with said higher-level system, a second interface unit which controls the interface with said plurality of disk storage devices, and a system disk unit, connected to said control unit, which stores at least the log data of said control unit, said method comprising the steps of:
Dependencies are inferred from the claim text.