Re: How to make btrfs forget a disk?
On Fri, 12 Mar 2021 at 20:17, Victor Sudakov <vas@sibptus.ru> wrote:
> deloptes wrote:
> > > "wipefs -t btrfs -f -a /dev/nvme1n1" did the job.
> > > Still wondering where those labels are stored on disk in Linux.
> > FS Superblock?
> Well, the FS (btrfs in this case) was not there already, but the magic
> label was still there somewhere.
My new knowledge after 5 seconds of searching, ...
https://en.wikipedia.org/wiki/Btrfs#Superblock
says that there are multiple copies of the superblock.
And the on-disk format is here:
https://btrfs.wiki.kernel.org/index.php/On-disk_Format
And maybe if the drive was once part of a multiple
device filesystem it might be referenced in superblocks
on other devices.
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