Method, computer program product, and system for limiting access by a failed node

Abstract

In a multi-node computer system, file access by a failed node is limited. Upon receipt on an indication of a node failure, a fencing command is sent to disks in a disk subsystem to which the failed node has access. If the fencing command sent to a disk fails, the fencing command is sent to a server having access to at least one disk in a disk subsystem to which the failed node has access to limit access by the failed node to the disk in the disk subsystem. If the fencing command sent to the server does not result in limiting access by the failed node to all the disks in the disk subsystem, sending the command to another server having access to at least one disk in the disk subsystem to limit access by the failed node to the disks in the disk subsystem. The fencing command may be sent to various servers until access by the failed node to all the disks in the disk subsystem is limited or until the fencing command has been sent to all the servers. The fencing command may be sent one at a time to servers having access to the disks in the disk subsystem, may be sent concurrently to all the servers having access to the disks in the disk subsystem, or may be forwarded from one server to another.