Storage system having a power source state detection unit

Details Storage system having a power source state detection unit Storage system having a power source state detection unit

2006-10-03

2006-10-03

Nguyen, Hoa T. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

C360S073030, C713S330000, C713S340000

Reexamination Certificate

active

07116507

ABSTRACT:
A storage system capable of reducing the start-up time of disk drives is provided. If a power source monitor circuit itself is normal (S93), the power source monitor circuit reads a detection signal from a detection circuit, and checks power sources (S94). If the power sources are normal (S95), all disks are spun up (S96). When the spin-up of all disks is completed (S98), processing is completed. If either of two power sources fails (S95), the power source monitor circuit reports the fact to a host control logical part (S99). The power source monitor circuit clears its internal counter to zero (S100) and issues a drive command to HDDs (S101). When the spin-up of all disks is completed (S103), processing is completed. If there is a disk which has not yet been spun up, the power source monitor circuit sets the internal counter to n+1 (S104) and returns to Step S101. N-number of HDDs are divided into groups respectively including six disks, six disks, four disks and one disk, and if the disks are driven in units of the groups, the power source monitor circuit sets the internal counter to n+Δn.

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