Fast and economical establishment of remote copy

Details Fast and economical establishment of remote copy Fast and economical establishment of remote copy

2007-10-16

2007-10-16

Sough, Hyung (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

Reexamination Certificate

active

10660043

ABSTRACT:
A storage apparatus is operable as primary in a remote copy pair and comprises a remote copy component operable to establish a remote copy relationship between said primary and a secondary; a copy component operable at the primary to create a copy for download onto a portable physical storage medium for offline transport to the secondary for upload; a synchronization component for synchronizing data at said secondary with data at said primary using an online link in response to a request for synchronization from the secondary; a metadata component operable to store a dirty state indicator of a portion of a storage space at the primary after establishment of the remote copy relationship at the primary; and the metadata component being operable to limit synchronization at the secondary to the portion of storage having a dirty state indicator at the primary.

REFERENCES:
patent: 5835953 (1998-11-01), Ohran
patent: 6941429 (2005-09-01), Kamvysselis et al.

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