The present disclosure provides systems and methods for optimizing lock detection in a change block tracker (CBT). A method comprises detecting changes on a disk volume and saving them to current changes, creating a volume changes and a snapshot changes collection, on a snapshot creation request, moving current changes to frozen changes, on a lock request, moving changes to the volume changes collection of the current snapshot, on another lock request, moving volume changes of current snapshot to frozen changes and deleting snapshot changes of current snapshot, when snapshot name is not the same as current snapshot, otherwise: moving the volume changes collection to the frozen changes, copying the frozen changes to the current changes, moving the snapshot changes collection to the frozen changes, and copying the snapshot changes collection to the current changes, moving all volume changes for other snapshots to current changes and allowing the client to read the frozen changes.