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oceanBT
Asked: 2016-06-20 06:59:29 +0800 CST

Is adding device to subvolume the same as adding device to main filesystem in btrfs?

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When I add a device to a btrfs sub-volume with 

btrfs device add /dev/sdb /path/to/subvolume

is the added device then only used for the sub-volume or is it used by the whole file-system ?

Or the question in the other way: Is it possible to add a device only to a sub-volume?

thanks!

filesystem

1 Answers

  1. Best Answer

    You can't add a device to a subvolume. You can add a device only to a filesystem.

    But this command will work with any path to an object located on a btrfs filesystem.

    And it looks like you do not quite understand what subvolume is. Adding a device to a subvolume makes no sense for me at all.

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