>>>>> "ch" == c hanover <chano...@umich.edu> writes:

    ch> is there a way to a) securely destroy a filesystem,

AIUI zfs crypto will include this, some day, by forgetting the key.

but for SSD, zfs above a zvol, or zfs above a SAN that may do
snapshots without your consent, I think it's just logically not a
solveable problem, period, unless you have a writeable keystore
outside the vdev structure.

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