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I have a multi-device BTRFS volume and I would like to re-size one of the partitions. To be more precise:

My /home is spread across two separate BTRFS partitions. I shrunk down another partition to allow one of the BTRFS partitions to grow. One approach that I know of and have used to create a new BTRFS partition and add that to the pool.

A cleaner approach would be to grow the BTRFS partition, using the unallocated space I created. I would just pop in a GParted live CD and grow the partition itself, instead of creating a totally new partition on the unallocated space.

The question is: is this safe? Will the files that are already on the partition be found by the OS? Will the OS still recognize the partition as being part of the multi-device volume?

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I took a risk and resized the BTRFS partition using the latest GParted live CD. The process took about 6 hours, but it was a success.When I rebooted, Linux detected the change in filesystem size and the additional free space was already alocated to the /home volume. – Benjamin B. Mar 3 '13 at 22:52

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