Storage system which controls access to logical devices by...

Details Storage system which controls access to logical devices by... Storage system which controls access to logical devices by...

2006-08-24

2008-11-04

Shah, Sanjiv (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

Reexamination Certificate

active

07447858

ABSTRACT:
There is provided a storage system suitable for an open system which has advanced security functions for logical devices. In a storage system such as a RAID system, 6 types of access attributes which are Readable/Writable, Read Only, Unreadable/Unwritable, Read Capacity0, Inquiry Restricted, and S-vol Disable, can be set for each logical device. Read Capacity0makes a response “capacity0” upon inquiries from hosts about capacity. Inquiry Restricted does not permit the hosts to recognize logical devices. S-vol Disable does not permit pair forming for duplication of a logical device with another device as the destination of copying. Upon receipt of commands from hosts of the open system, the storage system changes command processes and responses, depending on the difference in operation system, vendor, version, or the like, between hosts.

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