Patent ID: 8931876
Filing Date: 2015-01-13
Classification: B41J,G06F

Abstract:
1. A storage apparatus comprising: a controller that performs a communication to a host apparatus; a storage unit in which data from the host apparatus are written; and a storage controller that controls accessing to the storage unit, wherein the controller receives a command packet and a data packet corresponding to the command packet from the host apparatus, wherein in the case where a write enable bit of the data packet is set to be in a writing permitted state, the controller issues an update command for updating an address information on the storage controller and issues a write command to the storage controller for writing the data of the data packet on the storage unit, and wherein in the case where the write enable bit is set to be in a writing non-permitted state, the controller issues the update command for updating an address information on the storage controller and does not issue the write command to the storage controller; wherein the controller has a first mode and a second mode as operation modes, wherein in the first mode, in the case where the write enable bit of the i-th data packet is set to be in a writing permitted state, the controller performs the write commanding of the data of the i-th data packet on the storage controller, and in the case where the data of the i-th data packet are normally written in the storage unit, the controller sends an acknowledgement as a reply to the host apparatus, and wherein in the second mode, in the case where the write enable bit of the i-th data packet is set to be in a writing permitted state, the controller performs the write commanding of the data of the i-th data packet on the storage controller and does not send the acknowledgement as a reply to the host apparatus.