Description of problem: When issuing a wipefs -a on a btrfs volume, there should be three signatures removed but only one is removed. Version-Release number of selected component (if applicable): libblkid-2.25-3.fc21.x86_64 How reproducible: Always Steps to Reproduce: # mkfs.btrfs /dev/sdb # wipefs -a /dev/sdb /dev/sdb: 8 bytes were erased at offset 0x00010040 (btrfs): 5f 42 48 52 66 53 5f 4d Actual results: Only 8 bytes erased at offset 0x00010040 Expected results: 8 bytes should be additionally erased at offsets 0x04000040 and 0x1000000040. 64KB, 64MB, 256GB. Additional info: https://btrfs.wiki.kernel.org/index.php/Problem_FAQ#What_if_I_don.27t_have_wipefs_at_hand.3F
Sort of a duplicate but I decided to open a new bug against util-linux/libblkid per original bug 889888 comment 28. But then barely 2 minutes later I found this: https://github.com/karelzak/util-linux/commit/c93c20304ce544d2f8200540ccf25e08900b2e9d I guess nevermind!