> Since it's nonpersistent, it can only be re-created.

Ahh -- which "raidstart" does not do ... right ...

> The 'old' mdadd+mdrun was always re-creating arrays as well.

So that has to be used ...  [ but cannot share a /etc/raidtab :-( ]

> raidstart (and autostart) starts only 'persistent' arrays.

I am learning ...

raidstart appears to read the SB from the first "device" it finds (not device 
0, but the first) in /etc/raidtab and use that.
This means that if the first disk of a RAID1 is bust/corrupt/..., raidstart 
won't work until the lines of /etc/raidtab are re-arranged.
Is this intended ?
[ It makes my "re-weite the SB on /dev/XXXn" perl script very useful :-) ]

Would it work if raidstart could be asked to ignore /etc/raidtab and instead
        start the RAID device whose SB can be found on /dev/XXXN

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