Claims
- 1. A method for controlling access to a logical unit in a computer storage subsystem, said method comprising:
creating at said computer storage subsystem a first mapping, said first mapping being between a logical unit identifier, a virtual unit identifier and a uniquely assigned host identifier; creating at said computer storage subsystem a second mapping, said second mapping being between a dynamically assigned host identifier and said uniquely assigned host identifier; receiving at said computer storage subsystem an inquiry request for at least one virtual logical unit in said computer storage subsystem, said request comprising at least a dynamically assigned host identifier, corresponding to an issuer of said inquiry request, and a requested virtual unit identifier; searching said second mapping using said dynamically assigned host identifier to obtain a corresponding uniquely assigned host identifier; searching said first mapping using said corresponding uniquely assigned host identifier; determining whether access by said issuer of said inquiry request, to a logical unit corresponding to said requested virtual unit identifier, is permissible based upon whether a relation between said corresponding uniquely assigned host identifier to said requested virtual unit identifier exists in said first mapping; if said access is permissible, then establishing accessibility between said logical unit corresponding to said requested virtual unit identifier and said issuer, said logical unit determined from a relation between said requested virtual unit identifier and a corresponding logical unit identifier determined from said first mapping; and reporting whether said access is permissible to said issuer of said inquiry request.
Priority Claims (1)
Number |
Date |
Country |
Kind |
P00-010115 |
Jan 2000 |
JP |
|
CROSS-REFERENCES TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. patent application Ser. No. 09/561,404, filed Apr. 27, 2000, which claims priority from Japanese Patent Application Reference No. P00-010115, filed Jan. 14, 2000, and is related to co-pending application (Attorney Docket No. 16869P-008520US), filed herewith, the entire contents of all of whichh are incorporated herein by reference for all purposes.
Continuations (1)
|
Number |
Date |
Country |
Parent |
09561404 |
Apr 2000 |
US |
Child |
10737477 |
Dec 2003 |
US |