Storage unit and storage unit subsystem

Details Storage unit and storage unit subsystem Storage unit and storage unit subsystem

1999-06-03

2000-08-01

Moise, Emmanuel L.

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

714 6, G11C 2900

Patent

active

060981911

ABSTRACT:
An intermediate value derived from old and new data record values or old and new data themselves are sent from a control unit to a disk unit which stores a parity record as information necessary for updating parity. The disk unit reads an old parity record and generates a new value of parity record based on the read old parity and the information received from the control unit. The generated new value is stored in an empty record on the storage medium to which a read/write head is first positioned after the generation of the new value and in which effective data has not been stored. In a disk array system, a time required to update the parity record due to the updating of the data record is reduced and a performance of the storage unit subsystem is improved.

REFERENCES:
patent: Re34100 (1992-10-01), Hartness
patent: 5253125 (1993-10-01), Erikson et al.
patent: 5729397 (1998-03-01), Ottesen et al.
patent: 5734812 (1998-03-01), Yamamoto et al.
patent: 5734813 (1998-03-01), Yamamoto et al.
patent: 5787459 (1998-05-01), Stallmo et al.
D. Patterson, et al "A Case for Redundant Arrays of Inexpensive Disks (RAID)" ACMSIGMOD Conference Proceedings, Chi Chicago, Jun. 1-3, 1988, pp. 109-116.
Mogi, et al, "Evaluation of Performance of RAIDS disk arrays with Virtual Stripe" Technical Serch Report of the Institute of Electronics, Information and Communication Engineers, Sep. 1993, vol. 25, No. 251, pp. 69-75.

Affiliated with

Also associated with

Rating

Storage unit and storage unit subsystem does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Storage unit and storage unit subsystem, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Storage unit and storage unit subsystem will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-674586