B_FAILFAST I/O Disabled

I'm getting this message at boot time on my volume manager mirror devices. What does it mean?
[108 byte] By [shdanfo] at [2007-11-25 23:34:56]
# 1
I found the answer in SunSolve. http://sunsolve.sun.com/search/document.do?assetkey=1-25-74915-1
shdanfo at 2007-7-5 18:19:35 > top of Java-index,General,Talk to the Sysop...