JBD: barrier-based sync failed - disabling barriers

[Adrian Chapela <achapela.rexistros@gmail.com>]

I am testing ext4 and when I mount the FS I receive the next error:

   kernel: JBD: barrier-based sync failed on cciss!c1d0p1:8 - disabling 
barriers

How important is this error ? I was looking in Google for this error and 
it is an old error. I only found errors until 2006

Regards, Adrián.