Patent ID: 8775876

Claim:
A method for controller level identification and isolation of a degraded physical link (PHY) in a serial attached small computer system interface (SAS) domain, the method comprising: using a computing device or processor, the computing device or processor configured to operate non-transitory computer readable code embodied within controller level intelligence of an SAS domain, to accomplish the steps of: receiving an adjustable PHY stabilization timer delay; receiving an adjustable error threshold; monitoring a plurality of PHY pairs, the plurality of PHY pairs associated as connecting through a wide port, said monitoring after expiration of said adjustable PHY stabilization timer delay; monitoring a status of said wide port, said monitoring after expiration of said adjustable PHY stabilization timer delay; recording, to an error history register storage operatively connected to said computer device, a history of errors of each of said monitored PHY pairs; comparing said history of errors of at least one monitored PHY pair with said adjustable error threshold; disabling said at least one monitored PHY pair if said history of errors of at least one monitored PHY pair exceeds said adjustable error threshold; enabling said at least one monitored PHY pair if said status of said wide port indicates an unconnected state; and delivering a notification of the disabling and enabling.