Re: btfs disk compatibility between i386 and amd64
> Careful, unlink in the *nix world typically means delete (a file), while
you probably meant unmount / mount.
Yes, precisely.
> In general there shouldn't be a problem for newer kernels to read older
versions of a particular file system[1], but the other way around can be
a problem.
That's interesting in itself. Makes some sense.
Thanks much.
On 1/28/22, Andrei POPESCU <andreimpopescu@gmail.com> wrote:
> On Mi, 26 ian 22, 17:33:04, Joseph Brenner wrote:
>> I was wondering if the on-disk data format for btrfs is
>> compatible between the i386 and amd64 code bases--
>> e.g. would you expect to be able to swap data drives
>> between machines running either?
>
> In general yes.
>
>> I've got an old i386 installation with /home in it's
>> own partition, and I'm wondering if I can expect to just
>> unlink /home and install a new amd64 version, and then link
>> in the home parition again.
>
> Careful, unlink in the *nix world typically means delete (a file), while
> you probably meant unmount / mount.
>
>
> In general there shouldn't be a problem for newer kernels to read older
> versions of a particular file system[1], but the other way around can be
> a problem.
>
> More than that, as far as I recall some newer kernels would
> automatically enable some new features thus rendering the particular
> file system unreadable for older kernels[2].
>
> In any case, this should be very well documented for every file system,
> so you should check the btrfs documentation for that.
>
>
> [1] In this context I consider the various ext file systems to be
> different file systems, not different versions of the same file system,
> although they do have much more in common between them then with xfs or
> so.
>
> [2] I believe this was with ext4, but it could have been ext3
>
> Kind regards,
> Andrei
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