Excerpts from Alexey A Nikitin's message of 2011-03-10 12:30:54 -0500: > 2011/3/10 Chris Mason <chris.mason@xxxxxxxxxx> > > > > Which kernel were you on? ÂWas btrfs directly accessing the disks or > > were things like LVM in use? > > Recent kernels (.37 and higher) have improved support for barriers in > > LVM and friends, but btrfs directly using the disks should have been > > safe for a long time. > > Now that's funny. I'm using 2.6.32-5-amd64 from Debian Wheezy and > while btrfs on top of LVM works perfectly stable I have now trouble > with FS that is directly on partition. Does it make difference > stability-wise if partition table on disk is GPT rather than > old-school MS-DOS? Because all my disks, LVM and non-LVM, are set with > GPT. LVM is very reliable, the only time you run into trouble is if you have a drive with writeback cache enabled (99.99% of sata drives) and LVM isn't passing the barriers through. GPT vs MS-DOS isn't crucial, its just important that if you have a writeback cache, you either get the barriers down to the drive or you turn off the writeback cache. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
