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Title:
DISK ARRAY UNIT
Document Type and Number:
Japanese Patent JP2001337759
Kind Code:
A
Abstract:

To provide a disk array unit that performs parity operation and data update efficiently.

The parity operation is performed in the first parity operation part or the second parity operation part while the corresponding data to the parity operation is sent in a block through an optical input-output part to the disk array from the first DRAM or the second DRAM provided in a pair with each parity operation part. The switching status of circuit changing switches of optical input-output parts from 221 to 226 is controlled by an adjustment circuit 24 so that data and a parity outputted in a block from a pair of the first DRAM and the first parity operation part or data and a parity outputted from a pair of the second DRAM and the second parity operation part in a block can be entered into a disk controller one after the other.


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Inventors:
KOSEKI SHINOBU
HIROTA MASANORI
SAKASAI KAZUHIRO
MIURA MASAAKI
Application Number:
JP2000153797A
Publication Date:
December 07, 2001
Filing Date:
May 24, 2000
Export Citation:
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Assignee:
FUJI XEROX CO LTD
International Classes:
G06F13/10; G06F3/00; G06F3/06; G06F11/10; G06F12/16; G11B19/02; G11B20/18; (IPC1-7): G06F3/00; G06F3/06; G06F12/16; G06F13/10; G11B19/02; G11B20/18
Attorney, Agent or Firm:
Atsushi Nakajima (3 outside)



 
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