btrfs-progs: docs: update raid table in mkfs manpage

* split copies to copies and parity and add a common header for all the
  raid options
* add missing RAID1
* n/a were dropped

Based on feedback from Duncan <1i5t5.duncan@cox.net>.

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/Documentation/mkfs.btrfs.asciidoc b/Documentation/mkfs.btrfs.asciidoc
index 12d8840..c9ba314 100644 (file)
--- a/Documentation/mkfs.btrfs.asciidoc
+++ b/Documentation/mkfs.btrfs.asciidoc
@@ -248,17 +248,23 @@ PROFILES
 
 There are the following block group types available:
 
-[ width="60%",options="header" ]
+[ cols="^,^,^,^,^",width="60%" ]
 |=============================================================
-| Profile | Redundancy          | Striping   | Min/max devices
-| single  | 1 copy              | n/a        | 1/any
-| DUP     | 2 copies / 1 device | n/a        | 1/1
-| RAID0   | n/a                 | 1 to N     | 2/any
-| RAID10  | 2 copies            | 1 to N     | 4/any
-| RAID5   | 2 copies            | 3 to N - 1 | 2/any
-| RAID6   | 3 copies            | 3 to N - 2 | 3/any
+.2+^.<h| Profile   3+^.^h| Redundancy           .2+^.<h| Min/max devices
+      ^.^h| Copies   ^.^h| Parity     ^.<h| Striping
+| single  | 1            |                |            | 1/any
+| DUP     | 2 / 1 device |                |            | 1/1 ^(see note)^
+| RAID0   |              |                | 1 to N     | 2/any
+| RAID1   | 2            |                |            | 2/any
+| RAID10  | 2            |                | 1 to N     | 4/any
+| RAID5   | 1            | 1              | 2 to N - 1 | 2/any
+| RAID6   | 1            | 2              | 3 to N - 2 | 3/any
 |=============================================================
 
+'Note:' DUP may exist on more than 1 device if it starts on a single device and
+another one is added, but *mkfs.btrfs* will not let you create DUP on multiple
+devices.
+
 KNOWN ISSUES
 ------------