Method and system for reliable remote-mirror...

Details Method and system for reliable remote-mirror... Method and system for reliable remote-mirror...

2008-03-04

2008-03-04

Lane, Jack (Department: 2185)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S114000, C710S039000

Reexamination Certificate

active

10094827

ABSTRACT:
On a dominant logical unit provided by a mass-storage device, hot spare disks are employed to create a much larger, disk-based time-ordered WRITE-request buffer that spans, in one embodiment, both electronic memory and hot spare disks. The much larger time-ordered WRITE-request buffer in the modified dominant logical unit allows for storing WRITE requests in time order for a much longer period of time during communications failure between the dominant logical unit and remote-mirror logical unit than in the current techniques that employ only an electronic-memory-based time-ordered WRITE-request buffer. On the remote-mirror logical unit, mass-storage space is provided for an alternate logical unit that can be resynchronized with the dominant logical unit following restoration of communications between the dominant logical unit and remote-mirror logical unit. When resynchronization is complete, a simple logical-unit-pointer switch operation can be employed to designate the alternate logical unit as the new remote-mirror logical unit, and the previous remote-mirror logical unit as the alternate logical unit.

REFERENCES:
patent: 6338126 (2002-01-01), Ohran et al.
patent: 6842835 (2005-01-01), Fujimoto et al.

Affiliated with

Also associated with

Rating

Method and system for reliable remote-mirror... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for reliable remote-mirror..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for reliable remote-mirror... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3946597