Backend storage is 2 SATA directly attached disks. No any caches on SATA controller. Both disks run in mdraid mirror. Zeroed files have written many days (some files was written and closed 2 weeks ago) ago before power fail. On Sat, Sep 29, 2012 at 12:19 AM, John R Pierce <pierce at hogranch.com> wrote: > On 09/28/12 12:09 PM, Ilyas -- wrote: >> Hello, >> >> One day our servers farm rebooted unexpectedly (power fail happened) >> and on centos 6.3 with up2date kernel we lost few hundred files (which >> probably was opened for reading, NOT writing) on XFS. >> >> Unexpected power lost follow to situation when some files get a zero size. > > what sort of physical storage? are you sure it is write-safe ? > write-back caches without battery backup are often a cause of data loss. > > > > -- > john r pierce N 37, W 122 > santa cruz ca mid-left coast > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos -- GPG Key ID: 6EC5EB27