Patent Number: 6,253,273

Title: Lock mechanism

Abstract: A method of providing a lock to a requester, the method including the steps of storing a lock indicator at a storage location on a storage medium; receiving a lock command from a requester on a host computer, wherein the lock command identifies the storage location on the storage medium and represents a lock request; in response to receiving the lock command, retrieving the lock indicator from the storage medium; performing an exclusive OR operation on the lock request and the retrieved lock indicator to produce a lock request result; and sending an indication back to the host computer indicating whether the lock request was granted.

Inventors: Blumenau; Steven M. (Holliston, MA)

Assignee: EMC Corporation

International Classification: G06F 12/14 (20060101); G06F 9/46 (20060101); G06F 012/00 (); G06F 012/14 ()

Expiration Date: 06/26/2018