| 主权项 |
1. An information storage system comprising:
a first storage apparatus configured to provide a first logical volume; a second storage apparatus configured to provide a second logical volume; and a quorum accessed from the first storage apparatus and the second storage apparatus and including information regarding states of the first storage apparatus and the second storage apparatus, wherein the first storage apparatus and the second storage apparatus are configured to make a host recognize the first logical volume and the second logical volume as a single volume, wherein the first storage apparatus is configured to read data from the first logical volume and send the data to the host upon receiving a read command to the single volume sent from the host, wherein the second storage apparatus is configured to read data from the second logical volume and send the data to the host upon receiving a read command to the single volume sent from the host, wherein the first storage apparatus is configured to, upon receiving a write command to the single volume sent from the host, write data to the first logical volume and the second logical volume, wherein the second storage apparatus is configured to, upon receiving a write command to the single volume sent from the host, write data to the first logical volume and the second logical volume, and wherein, after detecting communication failure with the quorum, the first storage apparatus and the second storage apparatus are configured to halt use of the quorum and change a state from Pair state to RC-pair state, wherein, the first storage apparatus is configured to, upon receiving a write command to the single volume sent from the host, write data to the first logical volume and the second logical volume in the RC-pair state, wherein, after detecting communication failure between the first storage apparatus and the second storage apparatus in the Pair state, either the first storage apparatus or the second storage apparatus is configured to continue I/O processing according to the information in the quorum, and wherein, after detecting communication failure between the first storage apparatus and the second storage apparatus in the RC-Pair state, the first storage apparatus is configured to continue I/O processing if possible, and the second storage apparatus is configured to halt I/O processing. |
