公开(公告)号：JPH08263227A

公开(公告)日：1996-10-11

申请号：JP33028795

申请日：1995-12-19

Applicant: SYMBIOS LOGIC INC

Inventor： CHIYAARUZU DEII BINFUOODO ,  MAAKU EI GEETONAA ,  SUTEIIBUN PII DENII

IPC: G06F11/16 ,  G06F3/06 ,  G06F11/10 ,  G06F11/14 ,  G11B20/18

Abstract: PROBLEM TO BE SOLVED: To recover consistency between a parity and data by performing an exclusive OR operation for each bit of the data stored inside a redundant group relating to an incomplete write I/O operation, calculating the consistent parity and writing it in a pertinent storage area. SOLUTION: A disk array system is provided with a nonvolatile memory 140 and a logic circuit 150 inside a controller 100. The logic circuit 150 responds to reset signals from a host system 200 or low power signals from a no-break power source and checks present drive activity so as to identify the incomplete write I/O operation. Corresponding to the logic circuit 150, the controller records information relating to the incomplete write I/O operation inside the nonvolatile memory 140. The information recorded inside the memory 140 is required so as to specify the redundant group inside an array and can be provided with the identification number of a disk drive and a block address, etc.