Storage control apparatus for copying volume, and copying method

摘要

A storage control apparatus includes: a copy processing unit to perform a first copy process of copying, when receiving a write request targeting on a write destination address with a copy of a copy source volume to a copy destination volume being not yet completed, write data of the write destination address to the copy destination volume, and to perform a second copy process, when executing a copy process of an overall storage area of the copy source volume, according to a copy sequence on a management area unit basis of management areas into which the overall storage area is segmented; and a copy sequence resetting unit to reset the copy sequences on the basis of a reception timing of the write request received during the second copy process by the copy processing unit and a write destination address.

主权项

1. A storage control apparatus, comprising:
a copy processing unit that performs a first copy process of copying, when receiving a write request targeting on a write destination address with a copy of a copy source volume to a copy destination volume being not yet completed, write data of the write destination address to the copy destination volume, and that performs a second copy process, when executing a copy process of an overall storage area of the copy source volume, according to a copy sequence on a management area unit basis of management areas into which the overall storage area is segmented; and a copy sequence resetting unit that resets the copy sequences on the basis of a reception timing of the write request received during the second copy process by the copy processing unit and a write destination address; wherein the copy sequence resetting unit determines, after determining the copy sequences, whether the copy sequences are consecutive and a management area group with addresses being consecutive exists, and changes, when the management area group such as this exists, ranges of the management areas so that the management area group is dealt with as one management area by the copy processing unit.