Solaris Volume Manager (SVM) Information message: md_mirror: B_FAILFAST I/O disabled (Doc ID 1007629.1)

Last updated on AUGUST 21, 2016

Applies to:

Sun Solaris Volume Manager (SVM) - Version 11.9.0 to 11.11 [Release 11.0]
Solstice DiskSuite Software - Version 4.2 to 4.2.1 [Release 4.0]
Oracle Solaris on SPARC (64-bit)
Oracle Solaris on x86-64 (64-bit)

Symptoms

On occasion messages similar to the following appear in /var/adm/messages.  This document explains their meaning and what should be done in response.

Dec 17 03:15:00 myhost md_mirror: [ID 437521 kern.info] NOTICE: md: d31: B_FAILFAST I/O disabled
Dec 17 03:15:00 myhost md_mirror: [ID 437521 kern.info] NOTICE: md: d32: B_FAILFAST I/O disabled
Dec 17 03:15:00 myhost md_mirror: [ID 437521 kern.info] NOTICE: md: d41: B_FAILFAST I/O disabled
Dec 17 03:15:00 myhost md_mirror: [ID 437521 kern.info] NOTICE: md: d42: B_FAILFAST I/O disabled

Cause

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