One of my Xen DomUs is getting memory corruption. I'm not sure why. I've replaced all the RAM in the system and run memtest86+. The other DomUs work well. Everything was fine before I upgraded to Debian/Testing a week ago, so presumably it's a software bug. The most common symptoms are application SEGVs and GLIBC reporting heap corruption for no apparent reason. Anyway I moved that system to btrfs and since then I've got a couple of corrupted files. Both files were from Debian packages so the --reinstall option to apt-get fixed that. It seems that when a file on disk has a checksum mismatch for all copies you get ESTALE as well as messages on the system console like the following: [ 6747.164889] btrfs: corrupt leaf, bad key order: block=1116618752,root=1, slot=0 BTRFS is doing some good already! -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/