[plug] Wiping disks properly

[Craig Ringer]

> If they're all on a LAN and have self-booting ethernet cards, the solution is 
> even easier. (-:

*shudder*
That's a horrible thought. "Whoops, I replaced the init script in 
/nfsroot with my nuke-everything script". Especially if they mount some 
stuff off a local hdd.

-- 
Craig Ringer
GPG Key Fingerprint: AF1C ABFE 7E64 E9C8 FC27  C16E D3CE CDC0 0E93 380D
	-- if it ain't broke, add features 'till it is.