usb external hd question
fbsd06 at mlists.homeunix.com
Wed Feb 27 14:23:37 UTC 2008
On Tue, 26 Feb 2008 19:58:14 +0100
Miguel Giral <mlgiral at gmail.com> wrote:
> also, a side question. When attaching a geli provider, i get this:
> GEOM_ELI: Device ad4s3.eli created.
> GEOM_ELI: Encryption: Blowfish-CBC 256
> GEOM_ELI: Crypto: software
> WARNING: Expected rawoffset 14548865, found 14548865
> i've been getting it since i edited the label of ad4s3.eli
> I don't really know if it's a bad thing to get that warning, since
> both numbers are the same.
If you look at the source code (in /usr/src/sys/geom/geom_bsd.c), it's
dividing the offsets by a sector-size when it prints them out. So they
only the same when rounded-down to a sector boundary. I guess you are
using a larger sector-size for geli, and specified a fraction of a
sector somewhere in the disklabel.
BTW it doesn't make much difference, but I don't see any point in using
anything other than 448 bits for blowfish under geli. Unlike the other
ciphers, no part of its performance is affected by keysize.
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