Switch apparatus

Details Switch apparatus Switch apparatus

2011-07-05

2011-07-05

Nguyen, Hiep T (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

Reexamination Certificate

active

07975112

ABSTRACT:
A method for controlling a switch apparatus connected to a first and a second storage apparatus, and a host, the switch apparatus managing a virtual storage area maintained by the first and second storage apparatuses, the host accessible to the virtual storage area by transmitting a command for identifying a subarea of the virtual storage area, the second storage apparatus allowable to an access faster than the first storage apparatus does, the method includes: receiving a command; determining which of the first and second storage apparatuses maintains the subarea to be accessed; accessing the subarea corresponding to the command; detecting a frequency of access to each of the subareas; and moving data stored in the first storage apparatus and having higher frequency of access than data stored in the second storage apparatus into the subareas maintained in the second storage apparatus.

REFERENCES:
patent: 6941432 (2005-09-01), Ronstrom
patent: 7054893 (2006-05-01), Mogi et al.
patent: 2003/0172149 (2003-09-01), Edsall et al.
patent: 7-160548 (1995-06-01), None
patent: 2003-150414 (2003-05-01), None
patent: 2003-271425 (2003-09-01), None
patent: 2006-331458 (2006-12-01), None

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