Hi Hendrik,

On Thu, 2021-11-11 at 18:47 -0500, Hendrik Boom wrote:
> On Thu, Nov 11, 2021 at 09:00:39PM +0100, tito via Dng wrote:
> > On Wed, 10 Nov 2021 18:37:24 -0500
> > Hendrik Boom <hendrik@???> wrote:
..cut..
> What puzzles me is that md1 and md2 could not proceed as refective
> RAID1's, where md0, which has lacked its second drive for month, was
> assembled as a defective, but active, raid.

Just a hint - as seen below, there is an (S) next to sda2 and sda3 - normally
that means a spare, not a member in the mirroring.

A spare drive contains no data and will automatically replace a failed drive,
but can not be used to reconstruct the array in degraded mode.

> > > > hendrik@april:/$ cat /proc/mdstat
> > > > Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5]
> > > > [raid4] [raid10]
> > > > md1 : inactive sda2[3](S)
> > > >       2391296000 blocks super 1.2
> > > >
> > > > md2 : inactive sda3[0](S)
> > > >       1048512 blocks
> > > >
> > > > md0 : active raid1 sdf4[1]
> > > >       706337792 blocks [2/1] [_U]
> > > >
> > > > unused devices: <none>
> > > > hendrik@april:/$

With best regards,
b.