This read-write integer (0-255, though only 0-2 are currently valid) sets the node's ErrorRecoveryLevel preference, where each higher level adds recovery capability on top of the lower levels (level 2 implies support for levels 0-1). An admin sets this to control how much in-session error recovery the iSCSI implementation attempts, such as digest-failure recovery, versus simply tearing down and re-establishing the session on any error. For example, an admin connecting to a target that only supports basic recovery would leave this at 0, while one pairing with a target that supports connection-level recovery might raise it to 2 for better resilience against transient network drops.