STORAGE CONTROL DEVICE AND CONTROL METHOD

摘要

The first storage area stores original data of an update target that is to be updated by a host. The controller divides data to be written over the original data of the update target stored in the first storage area into a plurality of pieces of update data and thereby distributes the plurality of pieces of update data for each of successive addresses. The second storage area stores the plurality of update data distributed by the controller. The third storage area stores information in which an update area address, which is an address of the first storage area to be overwritten by the plurality of pieces of update data of the original data of the update target, is associated with a storage destination address, which is an address of the second storage area that has stored the plurality of pieces of update data.

主权项

1. A storage control device comprising:
a controller; a memory includes a first storage are, a second storage are, and a third storage area; the first storage area configured to store original data of an update target that is to be updated by a host; the controller configured to divide data to be written over the original data of the update target stored in the first storage area into a plurality of pieces of update data and thereby to distribute the plurality of pieces of update data for each of successive addresses; the second storage area configured to store the plurality of update data distributed by the controller; and the third storage area configured to store information in which an update area address, which is an address of the first storage area to be overwritten by the plurality of pieces of update data of the original data of the update target, is associated with a storage destination address, which is an address of the second storage area that has stored the plurality of pieces of update data.