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    I've never used XFS but I've heard many reports of dataloss due to power failures and that a UPS is extremely recommended if you are going to use XFS. Commented Mar 19, 2011 at 18:38
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    @Arrowmaster I can confirm this from personal experience Commented May 8, 2011 at 1:23
  • I have been using XFS as my primary data partition form on both a desktop and laptop for the past year without issue. No UPS, and I have had enough kernel panics to have not shut it down safely quite a few times. Note: I do use ext4 for the root file system though. Commented Jun 8, 2011 at 16:53
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    XFS is also the only fs where, without a massive hardware failure, I've had data loss. I have no idea how they broke it so badly, since in IRIX it always works perfectly. Commented Mar 7, 2012 at 8:31
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    ReiserFS is long dead now (got abandoned halfway through for Reiser 4; still had sereve bugs without solution when finally deprecated), Reiser 4 newer saw the light of day (was supposed to handle features that were pointed out time and again are impossible to implement sanely, like multiple links to directories). Commented Mar 15, 2013 at 16:35