Disk array system and command processing method for disk array system
AssigneeHitachi, Ltd.
InventorsShoji Sugino, Kiichiro Urabe, Hiroshi Taninaka, Ikuo Uratani
Life of this patent
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Abstract
Commands can be issued by being flexibly adjusted to each of an in-band method and an out-of-band method. A disk controller includes: a pseudo-logical volume provided independently from a substantial logical volume; a command analyzer for analyzing a command received by means of communication on the in-band method or the out-of-band method; and a special command processing unit for executing operation over the substantial logical volume which corresponds to the pseudo-logical volume, instead of executing operation over the pseudo-logical volume, if the command means an instruction to operate the pseudo-logical volume.
Claims10
A disk array system comprising:
- a host system;
- and
- a disk array apparatus for providing the host system with a substantial logical volume for reading and writing data;
- wherein the disk array apparatus includes:
- a disk controller for communicating data with the host system on an in-band method;
- and
- a service processor for managing the configuration of the disk controller based on a command issued by a management application and received via communication on an out-of-band method;
- wherein the disk controller includes:
- a pseudo-logical volume provided independently from the substantial logical volume;
- a command analyzer for analyzing the command received via communication on the in-band method or the out-of-band method;
- and
- a special command processing unit for executing operation over the substantial logical volume which corresponds to the pseudo-logical volume, instead of executing operation over the pseudo-logical volume, if the command means an instruction to operate the pseudo-logical volume.
A command processing method for a disk array system comprising:
- a host system;
- and
- a disk array apparatus for providing the host system with a substantial logical volume for reading and writing data;
- wherein the disk array apparatus includes:
- a disk controller for communicating data with the host system on an in-band method;
- and
- a service processor for managing the configuration of the disk controller based on a command issued by a management application and received via communication on an out-of-band method;
- and
- wherein the command processing method comprising:
- a command analysis step for analyzing a command received via communication on the in-band method or the out-of-band method, executed by a command analyzer of the disk controller;
- and
- a special command processing step for executing operation over the substantial logical volume which corresponds to the pseudo-logical volume, instead of executing operation over the pseudo-logical volume, executed by a special command processing unit of the disk controller, if the command is analyzed to be an instruction to operate the pseudo-logical volume in the command analysis step.
Dependencies are inferred from the claim text.