Was the "-h" flag ever a valid switch?
The "-h" flag is not mentioned in the Wiki page for mkfs.btrfs [1].
In Ubuntu 12.04, "-h" is not a valid switch:
$ mkfs.btrfs -h
mkfs.btrfs: invalid option -- 'h'
usage: mkfs.btrfs [options] dev [ dev ... ]
options:
-A --alloc-start the offset to start the FS
-b --byte-count total number of bytes in the FS
-d --data data profile, raid0, raid1, raid10 or single
-l --leafsize size of btree leaves
-L --label set a label
-m --metadata metadata profile, values like data profile
-n --nodesize size of btree nodes
-s --sectorsize min block allocation
Btrfs Btrfs v0.19
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04 LTS
Release: 12.04
Codename: precise
[1] https://btrfs.wiki.kernel.org/index.php/Mkfs.btrfs
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https://bugs.launchpad.net/bugs/961251
Title:
mkfs.btrfs(8) does not explain -h switch
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