Difference between revisions of "Btrfs"

Btrfs (view source)

Revision as of 10:56, 7 December 2021

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first text for btrfs tools

Andreas85

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 = Btrfs Tools =
+For complete info an all tools for btrfs please do an actual search at the arch wiki and at the manjaro forum for "btrfs". In the following section only a few commands are described. Especially those commands that are often misinterpreted. Commands described earlier are omitted.
-===Btrfs===
+== btrfs (the command)==
+Be aware that some sub-commands of btrfs will not work as normal user. Other sub-commands do work but will give only partial info. So best use them as ''root'' or with ''sudo''.
-===btrfsck===
+==== help, version ====
-this is not what you think it is 😜
+'''help''' together with '''man btrfs''' or '''info btrfs''' will get you an overview over the usable options on your install. {{UserCmd|command=btrfs help}}
+With the '''version''' of btrfs given here you can look at [https://btrfs.wiki.kernel.org/index.php/Changelog changelog].{{UserCmd|command=btrfs version}}
+==== device ====
+'''scan''' will give no visible results 😜
+{{RootCmd|command=btrfs device scan}}
+'''stats''' will give a list of errors detected in the past. This all should be 0, or you may be in trouble.
+{{RootCmd|command=btrfs device stats /}}
+What to look for in device '''usage''':
+* RAID-level of Data, Metadata and System
+* Unalocated:
+Don't ever let ''Unalocated:'' get below 5% of your volume (or double the size you need for your next update)! If this goes too low, you will get into "out of space" trouble
+{{RootCmd|command=btrfs device usage /}}
+Without sudo this will give very wrong results for everything displayed. '''Dont´t use this without sudo !'''
+=== btrfs filesystem df / ===
+=== btrfs filesystem du ===
+=== btrfs filesystem show ===
+=== btrfs filesystem usage ===
+=== btrfs scrub status ===
+==btrfsck==
+This is not what you may think it is 😜
 == Recomendations ==