SUMMARY: problem with sds 4.2

The problem was fixed deleting the corrupted metadbs and recreating them
afterwards.
Some mirrors needed a metareplace command as well (a disk was corrupted
too).

Special thanks to:

Parissis Pvlos
Joe Fletcher
Bernhard Sadlowski
Jason Grove
Darren Dunham
Vani Bhat
Eugene Schmidt

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Alessandro Zibellini
Telecom Italia Media S.p.A. - TIN.IT
Unix Systems and Network Administrator
Mobile +39 335 140 3325
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email: a.zibellini@xxxxxxxxxx
       alessandro.zibellini@xxxxxxx
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