Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2008-06-03
2011-10-18
Doan, Duc (Department: 2185)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
Reexamination Certificate
active
08041911
ABSTRACT:
A remote copy system comprises a primary storage system having a primary volume, and a secondary storage system having a secondary volume forming a pair relationship with the primary volume. When the primary storage system receives a write command from a primary host computer, it stores the command in the primary volume and creates a journal added with time information. The secondary storage system receives the journal from the primary storage system and updates the secondary volume based on the received journal. The primary host computer determines, based on the operating status of the secondary storage system, either the time added to the latest journal that the secondary storage system received or the time added to the latest journal that updated the secondary volume as the recovery point objective, and provides the determined time this to the user.
REFERENCES:
patent: 2005/0055523 (2005-03-01), Suishu et al.
patent: 2006/0010300 (2006-01-01), Arakawa et al.
patent: 2007/0168361 (2007-07-01), Hirakawa et al.
patent: 2005-18506 (2005-01-01), None
Antonelli, Terry Stout & Kraus, LLP.
Doan Duc
Hitachi , Ltd.
LandOfFree
Remote copy system and method of deciding recovery point... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Remote copy system and method of deciding recovery point..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Remote copy system and method of deciding recovery point... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4264709