btrfs-progs: docs: clarify potential problems with convert
Add a note summarizing the problems. [ci skip] Issue: #257 Signed-off-by: David Sterba <dsterba@suse.com>
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@ -33,6 +33,13 @@ have a supported data block size (i.e. the same that would be valid for
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:command:`mkfs.btrfs`). This is typically the system page size (4KiB on x86_64
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machines).
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.. note::
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Always consider if a mkfs and file copy would not be a better option than
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the in-place conversion given what was said above. The conversion depends on
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3rd party libraries and the other filesystems could still evolve and add new
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features. Not all combinations are covered or tested.
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**BEFORE YOU START**
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The source filesystem must be clean, e.g. no journal to replay or no repairs
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