FUD about CGD and GBDE

[Poul-Henning Kamp]

In message <20050303120421.GW86348 at cicely12.cicely.de>, Bernd Walter writes:

>No matter what disk you take - writes never have been atomic.
>The major difference I see is that you get a read error back in
>the disk failure case, while such a crypto failure produces more or
>less random data without any error.
>Mounting unclean filesystems rw for bg_fsck can be considered
>dangerous with such unexpected data corruption.
>And how would you know that a restore from backup is required for
>a damaged file?

100% true.

The trouble is that it would cost a lot in performance and a doubling
in metadata to protect yourself against this.

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Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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