Storage system control method, storage system, and storage apparatus

A storage system control method of controlling a storage system comprising a first storage apparatus including a plurality of first storage volumes to store data therein in which when data is written in a first particular one of the first storage volumes, a copy of the data is also written in a second particular one thereof;

• a second storage apparatus including a plurality of second storage volumes to store data therein, the second storage apparatus being communicably connected to the first storage apparatus, and an information processor communicably connected to the first storage apparatus, comprising the steps of:
• transmitting by the information processor an identifier to identify the first particular one of the second storage volumes in the second storage apparatus to the first storage apparatus;
• stopping by the first storage apparatus the writing of the copy of data in the second particular one of the first storage volumes when data is written in the first particular one thereof;
• describing by the first storage apparatus the identifier in a data input/output request for the first particular one of the second storage volumes and transmitting the data input/output request to the second storage apparatus;
• writing by the second storage apparatus a copy of the data stored in the second particular one of the first storage volumes in the first particular one of the second storage volumes identified by the identifier described in the data input/output request;
• and
• writing by the second storage apparatus a copy of the data written in the first particular one of the second storage volumes in a second particular one thereof.

A storage system, comprising:

• a first storage apparatus including a first storage volume to store data therein;
• a second storage apparatus including a second storage volume to store data therein, the second storage apparatus being communicably connected to the first storage apparatus;
• an information processor communicably connected to the first storage apparatus;
• means for transmitting by the information processor an identifier to identify the second storage volume in the second storage apparatus to the first storage apparatus;
• means for describing by the first storage apparatus the identifier in a data input/output request for the second storage volume and transmitting the data input/output request to the second storage apparatus;
• and
• means for executing by the second storage apparatus data input/output processing for the second storage volume identified by the identifier described in the data input/output request.

A storage system, comprising:

• a first storage apparatus including a plurality of first storage volumes to store data therein in which when data is written in a first particular one of the first storage volumes, a copy of the data is also written in a second particular one thereof;
• a second storage apparatus including a plurality of second storage volumes to store data therein, the second storage apparatus being communicably connected to the first storage apparatus;
• an information processor communicably connected to the first storage apparatus:
• means for transmitting by the information processor an identifier to identify the first particular one of the second storage volumes in the second storage apparatus to the first storage apparatus;
• means for stopping by the first storage apparatus the writing of the copy of the data in the second particular one of the first storage volumes when data is written in the first particular one thereof;
• means for describing by the first storage apparatus the identifier in a data input/output request for the first particular one of the second storage volumes and transmitting the data input/output request to the second storage apparatus;
• means for writing by the second storage apparatus a copy of the data stored in the second particular one of the first storage volumes in the first particular one of the second storage volumes identified by the identifier described in the data input/output request;
• and
• means for writing by the second storage apparatus a copy of the data written in the first particular one of the second storage volumes in a second particular one thereof.

A storage apparatus connected to a second storage apparatus including a second storage volume to store data therein and an information processor, comprising:

• a first storage volume;
• means for receiving an identifier to identify the second storage volume in the second storage apparatus from the information processor;
• and
• means for describing the identifier in a data input/output request for the second storage apparatus to execute data input/output processing for the second storage volume identified by the identifier and transmitting the data input/output request to the second storage apparatus.

A storage apparatus connected to a second storage apparatus including a second storage volume to store data therein and an information processor, comprising:

• a plurality of first storage volumes to store data therein in which when data is written in a first particular one of the first storage volumes, a copy of the data is also written in a second particular one thereof;
• means for receiving an identifier to identify the second storage volume in the second storage apparatus from the information processor;
• means for stopping the writing of the copy of the data in the second particular one of the first storage volumes when data is written in the first particular one thereof;
• and
• means for describing the identifier in the data input/output request for the second storage apparatus to write a copy of the data stored in the second particular one of the first storage volumes in the first particular one of the second storage volumes identified by the identifier and transmitting the data input/output request to the second storage apparatus.