Is mdadm --create safe for existing arrays ?

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Greetings,

I have a SuSE 10.0 raid-1 root which will not properly
boot, and I have noticed that / and /boot have
non-persistent super blocks (which I read is required
for booting).

So, how do I change / and /boot to make the super
blocks persistent ? Is it safe to run "mdadm --create
/dev/md0 --raid-devices=2 --level=1 /dev/sda1
/dev/sdb1" without loosing any data ?

regards,

Peter

PS Yes, I have googled extensively without finding a
conclusive answer.
 

Peter Greis
freethinker gmbh
Stäfa Switzerland

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