On Wed, Dec 9, 2020 at 5:36 AM Chris Murphy <li...@colorremedies.com> wrote:
> Small clarification. 'chattr +C' to set the C file attribute is > 'nodatacow'. Since Btrfs is cow by default, it's generally OK to > assume cow unless this attribute is set. But there's a rather uncommon > and not highly recommended mount option too: nodatacow. This does not > set C attribute everywhere, but all the files written while this mount > option is used are nodatacow and will always be nodatacow. > > Note that nodatacow (how ever you enable it) also means nodatasum, > i.e. no checksumming for data, and no compression. > > Also, btrfs metadata (the file system itself) is always cow. It can't > be disabled. > What is the correct way to calculate the physical offset of the swap file in another subvolume ? -- Regards, Sreyan Chakravarty
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