Storage device system interfacing open-system host computer...

Details Storage device system interfacing open-system host computer... Storage device system interfacing open-system host computer...

2004-10-29

2008-09-09

Bataille, Pierre-Michel (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C707S793000

Reexamination Certificate

active

07424572

ABSTRACT:
A storage device system in which migration of data from an existing storage device to a higher-standard storage device is unnecessary, and in which discarding of existing storage devices by the user can be prevented. A CHF61receives a Read Capacity command from a new-type storage device25(S101). Using LDEV, LUN and other information tables, an LUN87is converted into a mapped LDEV (S102). A check is performed to determine whether the LDEV emulation type is read-only, write-only, or read/write (S103). If none of these, a check is performed to determine whether the emulation type is newly created (S104). If newly created, the size of all storage areas of the LDEV are set as the Max LBA in a response to the new-type storage device25(S105). If the result of S103is YES, the size of the user area in the LDEV is set as the Max LBA in a response to the new-type storage device25(S106). If not newly created, processing proceeds to the processing of S106.

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