Don D Walker

US Patent:

7543190, Jun 2, 2009

Filed:

Jun 28, 2006

Appl. No.:

11/426960

Inventors:

Don H. Walker - Katy TX, US

International Classification:

G06F 11/00

US Classification:

714 43, 714 44

Abstract:

False positive error warnings associated with hot insertion or removal of a device with an SAS link are filtered by comparing the timing of error warnings with the timing of hot insertion or removal of the device. An SCSI Enclosure Processor monitors physical device presence events through a side band bus, such as an I2C bus interfaced with physical devices. Upon detection of an error associated with the SAS link, an error filter module retrieves time stamped physical device presence events from the SCSI Enclosure Processor, compares the time stamp of the physical device presence event and suppresses the warning if the time stamp falls within a predetermined time of the error.