Mirror split brain avoidance

Details Mirror split brain avoidance Mirror split brain avoidance

2008-06-19

2011-11-15

Portka, Gary (Department: 2187)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C711S162000

Reexamination Certificate

active

08060776

ABSTRACT:
A data storage system has two computers. Each computer is assigned to a set of data. Two copies of each set of data are maintained. A first copy is stored on a first set of disks and a second copy is stored on a second set of disks. Each time that a data is written by a computer, a label is written to each set of disks, the label having fields for a status of each computer, a first ordinal which is increased each time that a new data is written, and a time stamp giving a time at which the last write was performed. After failure of a computer, a processor determines, in response to reading the labels of the first set of disks and the second set of disks, the most up to date copy of the data assigned to the failed computer.

REFERENCES:
patent: 5819292 (1998-10-01), Hitz et al.
patent: 5963962 (1999-10-01), Hitz et al.
patent: 6038570 (2000-03-01), Hitz et al.
patent: 6631477 (2003-10-01), LeCrone et al.
patent: 7111194 (2006-09-01), Schoenthal et al.
patent: 7133964 (2006-11-01), Rodrigues et al.
patent: 7143249 (2006-11-01), Strange et al.
patent: 7231489 (2007-06-01), Larson et al.
patent: 7392425 (2008-06-01), Schoenthal et al.
Common Internet File System (CIFS) Version: CIFS-Spec 0.9, Storage Networking Industry Association (SNIA), Draft SNIA CIFS Documentation Work Group Work-in-Progress, Revision Date: Mar. 26, 2001.
Fielding et al. (1999) Request for Comments (RFC) 2616, HTTP/1.1.
U.S. Appl. No. 10/011,844, filed Dec. 4, 2001 by Abhijeet Gole et al. for an Efficient Use of NVRAM During Takeover in a Node Cluster, all pages.
David Hitz et al. TR3002 File System Design for a NFS File Server Appliance published by Network Appliance, Inc. Jan. 19, 1994, 23 pages.

Affiliated with

Also associated with

Rating

Mirror split brain avoidance does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Mirror split brain avoidance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mirror split brain avoidance will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4296151