DISK ARRAY DEVICE

Japanese Patent JP3190820

B2

PROBLEM TO BE SOLVED: To simplify the circuit system of the drive module of a hot line insertion/detachment object and to reduce a hardware amount by supplying packaging check signals from a disk array controller to the respective drive modules of the hot line insertion/detachment object.
SOLUTION: In the case that the drive module 92b fails, an array data control circuit 804 starts a degradation operation for which the drive module 92b is cut off by the instruction of a CPU 805. Also, a packaging check circuit 806 actively (low level) outputs signals 201-203 for packaging check in time sharing and checks the packaging state of the respective drive modules. Then, at the time of the hot line insertion/detachment of the drive module 92b, when an array data bus 103 is during data transfer at the time of detecting the change of return signals 213 for the packaging check, by interrupting a data transfer processing and executing retrial, the malfunction of the data transfer processing is prevented.

WO/2002/029533	POWER FILTER WITH MULTIPLE INPUTS FOR A COMPUTER SYSTEM
JP2804176	[Title of Invention] Portable Computer
JP2023021163	MOBILE INFORMATION TERMINAL

Yousuke Umezaki

JP9669596A

July 23, 2001

April 18, 1996

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Shikoku NEC Software Co., Ltd.

G06F1/18; G06F3/00; G06F3/06; (IPC1-7): G06F3/06; G06F1/18; G06F3/00; G06F3/06

JP5324498A
JP7261944A
JP60175134A
JP4107614A
JP616273A
JP573235A
JP449413A
JP7244563A

Naoki Kyomoto (2 outside)

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