Title:
DISK ARRAY STORAGE SYSTEM INCLUDING HIGH PERFORMANCE PARITY FUNCTION ARCHITECTURE
Document Type and Number:
Japanese Patent JP3850478
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the operating performance of a disk drive by providing an independent parity auxiliary engine and a local memory to an RA ID storage system so as to omit access to the disk drive required for parity calculation.
SOLUTION: During disk write operation, data blocks received through a host SCSI channel 14 are stored in a local memory 136. A parity auxiliary engine 132 reads the data, calculates parity information and stores the result again to the local memory 136. Then a final data block is written to an adequate disk drive from the local memory 136. The local memory 136 consists of a DRAM or the like and is provided with a 72-bit interface to obtain economically a high frequency band. The parity auxiliary engine 132 uses a 128-byte FIFO to calculate the parity of the data in the local memory 136 in the unit of 1 burst at a time.
Inventors:
John W. Stewart
Dennis E. Gates
Rodney A. Deconing
Curtis W. Link
Dennis E. Gates
Rodney A. Deconing
Curtis W. Link
Application Number:
JP32869895A
Publication Date:
November 29, 2006
Filing Date:
December 18, 1995
Export Citation:
Assignee:
MAGNACHIP SEMICONDUCTOR LTD
International Classes:
G11B20/10; G11B20/18; G06F3/06; G06F11/10; (IPC1-7): G11B19/02; G11B20/10; G11B20/18
Domestic Patent References:
| JP5241870A | ||||
| JP6362056A | ||||
| JP2192026A | ||||
| JP4321123A | ||||
| JP5158621A | ||||
| JP675708A | ||||
| JP7261946A | ||||
| JP830402A |
Attorney, Agent or Firm:
Yoshiaki Nishiyama
Hiroji Nakagawa
Hiroji Nakagawa