Inventors:
Akira Yamamoto - Sagamihara, JP
Toshihiko Tamiya - Cupertino CA
Hisashi Takamatsu - Odawara, JP
Akira Kurano - Odawara, JP
Hirofumi Inomata - Tokyo, JP
International Classification:
G06F 1108
Abstract:
A disk array stores data records and parity records. The data records are transferred to the disk array through a control unit that is connected to a host processor. The disk array is part of a disk unit having a processor for generating parity records from information sent by the control unit to the disk unit. The parity record is generated and stored in the disk unit to reduce the number of data transfer operations between the control unit and the disk unit for storage systems using disk array disk units.