Aha, ted na to koukam, ze mate debian, teda stary jadra a na http://oss.sgi.com/projects/xfs/faq.html pisi:
Write barrier support is enabled by default in XFS since 2.6.17...
Takze dobry vysledek dakolu je tim, ze ma -o nobarriere, kdeto ostatni -o barriere a ne tim, ze to je 32/64 bitu.
Asi by to chtelo sjednotit, teda ve vsech pripadech pouzit -o nobarriere.

