METHOD OF CHECKING CORRECTNESS OF DATA ENTRY IN DUAL-CONTROLLER DATA STORAGE SYSTEM BASED ON ARRAY OF NONVOLATILE MEDIA AND APPARATUS THEREFOR Russian patent published in 2015 - IPC G06F11/07 G06F12/16 

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to computer engineering. A method of checking correctness of data entry in a dual-controller data storage system based on an array nonvolatile media, including first and second controllers, each having cache in random-access memory divided into segments, the method comprising: writing data received from an initiator into the cache of the first controller, wherein the data written in the cache are marked as "dirty"; calculating in the cache of the first controller, a check sum of the received data and other "dirty" data stored in the cache; transmitting the data received from the initiator from the first controller to the cache of the second controller, wherein the data written in the cache are marked as "dirty"; calculating in the cache of the second controller a check sum of the received "dirty" data and other "dirty" data stored in the cache; transmitting the check sum calculated in the first controller to the second controller; comparing, in the second controller, the check sums of the first and second controllers; transmitting, from the second controller to the first controller, the check sum comparison result; if the check sums match, the completion of the data synchronisation process is considered correct.

EFFECT: reduced probability of losing "dirty" data upon failure of one of the controllers.

14 cl, 3 dwg