** Description changed: Ubuntu kernels silently wrap access to disk locations above 2 TB back around to zero. This can easily be reproduced using lvm to create a thin provisioned virtual disk: lvcreate -s -n thin -L 1g --virtualsize 3t vg0 mke2fs -t ext4 -E lazy_itable_init /dev/vg0/thin e2fsck -f /dev/vg0/thin Fsck will find errors in the bitmap because it is actually reading the superblock instead of the allocation bitmap situated just after the 2 tb mark. + This affects Karmic and Lucid and will cause data loss and severe + filesystem corruption that may go unnoticed for some time, if someone + creates a snapshot of a 2TB + size logical volume. It was fixed + upstream as of 2.6.33. + See comment #26 for details on the problem and what needs done to fix it.
-- Silent wraparound on > 2 TB LVM snapshots https://bugs.launchpad.net/bugs/593086 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
