Re: mount: unknown filesystem type 'LVM2_member' ...

From	Reco <recoverym4n@enotuniq.net>
Newsgroups	linux.debian.user
Subject	Re: mount: unknown filesystem type 'LVM2_member' ...
Date	2020-07-14 16:00 +0200
Message-ID	<AstDs-5JX-3@gated-at.bofh.it> (permalink)
References	<AqCrw-22M-3@gated-at.bofh.it> <AqDnz-2Fd-15@gated-at.bofh.it> <AqDQB-341-5@gated-at.bofh.it> <AqE9X-3au-9@gated-at.bofh.it> <AsrV0-4UY-13@gated-at.bofh.it>
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On Tue, Jul 14, 2020 at 02:00:53PM +0200, Albretch Mueller wrote:
> On 7/9/20, Reco <recoverym4n@enotuniq.net> wrote:
> > More or less. The correct sequence is:
> > 1) cryptsetup luksOpen
> > 2) pvscan && vgchange -ay
> > 3) mount "/dev/lbrtchx-vg/home" "/media/abc123"
> >
> > And the unmounting should go in reverse:
> > 1) umount /media/...
> > 2) vghcange -an ...
> > 3) cryptsetup luksClose
> 
>  thank you, but for some reason I can't quite understand, I haven't
> found a thorough, self-describing step-by-step guideline about such
> matters and I don't have the time right now, Internet access to make
> another mistake.
> 
> # _DEV_MPPR="/dev/mapper/${_CR_CRYPTO}"
> # echo "// __ \$_DEV_MPPR: |${_DEV_MPPR}|"
> // __ $_DEV_MPPR: |/dev/mapper/sdc3_xcrypto|
> 
> # time mkfs --type ext4 "${_DEV_MPPR}"
> mke2fs 1.43.4 (31-Jan-2017)
> /dev/mapper/sdc3_xcrypto contains a LVM2_member file system
> Proceed anyway? (y,N) N

That does seem wrong. Is /dev/mapper/sdc3_xcrypto shown by
lvdisplay/lvs? Because it is not, you probably should not try to mount
it.

Reco

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Thread

mount: unknown filesystem type 'LVM2_member' ... Albretch Mueller <lbrtchx@gmail.com> - 2020-07-09 13:00 +0200
  Re: mount: unknown filesystem type 'LVM2_member' ... Reco <recoverym4n@enotuniq.net> - 2020-07-09 14:00 +0200
    Re: mount: unknown filesystem type 'LVM2_member' ... Albretch Mueller <lbrtchx@gmail.com> - 2020-07-09 14:30 +0200
      Re: mount: unknown filesystem type 'LVM2_member' ... Reco <recoverym4n@enotuniq.net> - 2020-07-09 14:50 +0200
        Re: mount: unknown filesystem type 'LVM2_member' ... Albretch Mueller <lbrtchx@gmail.com> - 2020-07-14 14:10 +0200
          Re: mount: unknown filesystem type 'LVM2_member' ... Reco <recoverym4n@enotuniq.net> - 2020-07-14 16:00 +0200

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