Was "-h" ever a valid switch?
The "-h" flag is not mentioned in the Wiki page for mkfs.btrfs [1].
The "-h" flag was included with a patch to the kernel, but that patch
was not incorporated into the kernel [2] [3]
In Ubuntu 12.04, the "-h" flag is invalid:
$ 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 --description
Description: Ubuntu 12.04 LTS
[1] https://btrfs.wiki.kernel.org/index.php/Mkfs.btrfs
[2] https://www.google.com/search?q=%22mkfs.btrfs+-h%22
[3] https://btrfs.wiki.kernel.org/index.php/Project_ideas
** Changed in: btrfs-tools (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/961251
Title:
mkfs.btrfs(8) does not explain -h switch
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