Dell Products Inc.

Daniel Savilonis

Bing Liu

Joel Miller

A request is received to upgrade firmware for disk array enclosures (DAEs). Each DAE is reachable by a host server using first and second paths. The first path extends from a first port of a first HBA of the host server to each of a set of first input/output modules (IOMs) in the DAEs. The first IOMs have first SAS expanders to which storage disks are connected. A flag is set in firmware of each first IOM that causes SMP and SES protocol services of a DAE to mark each respective storage disk connected to each respective SAS expander of the first SAS expanders as vacant. During the firmware upgrade, advertising to a SAS driver topology change events indicating that a storage disk has been removed or added is withheld based on the flag.

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Framingham, MA, United States of America

Daniel Savilonis