[tmikaeld]

This actually makes me glad to use ZFS (FreeBSD and ZOL) on all servers, a broken RAID on a different filesystem could have meant complete data-loss.

From all of the cases I've read where people where not idiots (Not using snapshots and overwriting a dataset..), it's by far the safest filesystem I've seen during my 12 years working with it and I've yet to loose a single file.

Sure, performance can suffer and RAM is pricey, but safety of the data is more important.

Considering this is a hardware fault, I think Gandi.net did their best. However, they should offer clients optional ZFS-Replication as an extra measure.

[RantyDave]

But would this replicate the broken metadata? And exactly how do they think it got there in the first place? TBH this sounds like a problem with an ancient version of Solaris that's been enhanced by a relatively small company and it's finally just bitten them.