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

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* 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>
This commit is contained in:
David Sterba 2015-11-24 18:14:39 +01:00
parent a99d13dcce
commit 73a015578a
1 changed files with 14 additions and 8 deletions
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22
Documentation/mkfs.btrfs.asciidoc
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@ -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
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