Bug#549530: mdadm: checkarray caused machine lockup

[Christian Pernegger]

The behaviour is reproducible. Running checkarray --all always hangs
the box after some time with the symptoms described. That's true even
in single user mode with no other accesses.

I will now check if checking (no pun intended) the arrays serially works.

As this looks more like a kernel bug in md and/or libata I probably
shouldn't have reported it against mdadm in the first place. Sorry, it
was late ...

Any help appreciated,

Chris