In a method of synchronizing with a separated disk cache, the separated cache is configured to transfer cache data to a staging area of a storage device. According to the invention, CO2 is dissolved in seawater and the salinity of the seawater is increased to produce CO2-containing brine. Also included is an ink cartridge having an integrated printhead for printing onto said image transfer roller, as well as a cleaning station configured to clean the image transfer roller after said image is transferred to the paper. and a pressure greater than about 500 Torr to form a nitrided silicon oxide layer. The method includes: detecting driving information; determining whether a 3\u21922 shift condition before stopping is satisfied; determining, when the 3\u21922 shift condition before stopping is satisfied, whether a shift control condition is satisfied; and controlling the 3\u21922 shift before stopping when the shift control condition is satisfied.