Patent ID: 7548994

Claim:
A method for serial attached SCSI (SAS) target initiated asynchronous event notification (AEN) in an information handling system, said method comprising the steps of: A) determining arrival of an asynchronous event notification (AEN) from a serial attached SCSI (SAS) target; B) determining whether a command from a SAS host is pending to the SAS target, wherein B1) if the SAS host command is pending then checking the condition of the SAS target for determining the AEN thereof and then going to step D2), and B2) if the SAS host command is not pending then determining whether an AEN timer is running, wherein B2a) if the AEN timer is running then going to step C), and B2b) if the AEN timer is not running then starting the AEN timer; C) determining when the running AEN timer expires, and then; D) determining whether the AEN is still pending, wherein D1) if the AEN is still pending then sending an out-of-band message sequence from the SAS target to the SAS host, and D2) if the AEN is not pending then ending.