On 28 October 2006 23:39, Alan McKinnon wrote: > On Saturday 28 October 2006 16:41, b.n. wrote: > > Dale ha scritto: > > > If you use XFS, make sure you have good power. XFS does not like > > > power failures at all. I have had to reinstall on a second rig > > > because of this very problem. If you have a UPS, that may be OK. > > > > Thanks a lot for the advice. Power outages do happen and I don't have > > an UPS. Why does it happen? Isn't XFS journaled? > > Yes it is journaled but it also allows data to be very aggressively > cached. Make that VERY aggressively cached. With the result that data > can be held in a huge cache somewhere and the kernel can be convinced > it has been written to disk.
No journaled filesystem can 100% prevent data loss or even filesystem corruption in cases of power outages. Think of the the builtin caches of your drive. If that builtin cache contains a changed journal (not written to the actual drive yet) when a power failure occurs => bang! Uwe -- Mark Twain: I rather decline two drinks than a German adjective. http://www.SysEx.com.na -- gentoo-user@gentoo.org mailing list
