Patent ID: 9317423
Filing Date: 2016-04-19
CPC Classification: G06F

Claim Text:
1. A storage system comprising: a first storage apparatus including a first processor, at least one first memory device providing a storage area for a primary logical volume, and a first flash package which has a plurality of first flash memory chips and a first package processor and temporarily stores write data to be written to the primary logical volume; and a second storage apparatus including a second processor, and at least one second memory device providing a storage area for a secondary logical volume, and receiving journal data corresponding to the write data of the primary logical volume and update information, and reflecting the journal data to the secondary logical volume according to the update information; wherein when the first storage apparatus receives a first write command which requests to write a first write data to the primary logical volume, the first package processor in the first flash package receives the first write data transferred by control of the first processor, allocates a first physical area in the first flash memory chips to a first cache logical area managed by the first flash package, and writes the first write data to the allocated first physical area, and wherein, when the first package processor in the first flash package receives a first journal data creation request corresponding to the first write data from the first processor, the first package processor allocates the first physical area which stores the first write data to a second cache logical area for first journal data corresponding to the first write data managed by the first flash package, wherein the first processor creates first update information, which includes a first sequential number indicating a write order of the first write data, and sends the first update information to the first flash package, wherein the first package processor allocates a second physical area in the first flash memory chips to a third cache logical area for update information managed by the first flash package, and stores the first update information to the allocated second physical area, wherein when the first storage apparatus receives a second write command which requests to update the first write data after the first package processor receives the first journal data creation request, the first package processor in the first flash package receives the update to the first write data transferred by control of the first processor, releases the allocation of the first physical area to the first cache logical area, allocates a third physical area in the first flash memory chips to the first cache logical area managed by the first flash package, and writes the update to the first write data to the allocated third physical area, and wherein the first, second and third cache logical areas are each different cache logical areas managed by the first flash package, and the first, second and third physical areas are each different physical areas in the first flash memory chips.