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.
Solaris Multipathing (MPxIO/scsi_vhci) continues to send I/O on paths where command timeouts have occurred.
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 188.8.131.52.0 (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.
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