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Errors on Path do not Result in Solaris Multipathing (MPxIO/scsi_vhci) Assigning Path as Least Desired (Doc ID 2273214.1)

Last updated on FEBRUARY 13, 2019

Applies to:

Solaris Operating System - Version 10 1/13 U11 and later
Solaris x64/x86 Operating System - Version 10 1/13 U11 and later
Information in this document applies to any platform.

Symptoms

Solaris Multipathing (MPxIO/scsi_vhci) continues to send I/O on paths where command timeouts have occurred.

Changes

The following enhancement requests introduced the concept of least desired path for Solaris Multipathing (MPxIO/scsi_vhci) with Sun Common SCSI Architecture version 3 (SCSAv3) compliant drivers:

Bug 15638923 - SUNBT6947062 - PSARC/2011/029 Least Desired pkt_path_instance

Bug 15735699 - SUNBT7079597 - PSARC/2013/196 MPxIO: least desired path instance phase II

Fix delivered in Oracle Solaris 11.1.20.5.0 (or greater), Solaris 10 SPARC Patch ID 150400-14 (or greater), Solaris 10 x86 Patch ID 150401-14 (or greater).

Unfortunately, the Solaris Fibre Channel drivers are not SCSAv3 compliant, and due to complexity, the risks are considered too substantial for redesign at this time.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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