Patrick Welche <prlw1%cam.ac.uk@localhost> writes: > Any thoughts on the pros and cons of > > # cgdconfig -s cgd0 /dev/sd0e adiantum 256 < /dev/urandom > # dd if=/dev/zero of=/dev/rcgd0d bs=64k progress=512 > # cgdconfig -u cgd0 > > vs > > # dd if=/dev/urandom of=/dev/rsd0e bs=64k progress=512 I don't think it makes much difference. The two worries are 1) whether the writes actually happen and 2) is a single write of data sufficient. For 1, I would expect that if there were some failure, errors would be easier to grasp from the dd method, being less complicated, and For 2, modulo the SSD caveats, I'd write random bits three times, rather than once. There, dd from /dev/urandom seems good enough. It's not that hard to run it three times.
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