BTX Loader crashes -- Help wanted
freebsd at edvax.de
Sat Nov 21 00:52:34 UTC 2009
On Fri, 20 Nov 2009 15:48:34 -0800, "Ronald F. Guilmette" <rfg at tristatelogic.com> wrote:
> But I have one question. The author sez to do this:
> dd if=8.0-BETA1-amd64-memstick.img of=/dev/da0 bs=10240 conv=sync
> I just want to know what the effect of conv=sync and why it might be
According to "man dd":
bs=n Set both input and output block size to n bytes, superseding the
ibs and obs operands. If no conversion values other than
noerror, notrunc or sync are specified, then each input block is
copied to the output as a single block without any aggregation
of short blocks.
in conjunction with
Where value is one of the symbols from the following list.
sync Pad every input block to the input buffer size. Spaces
are used for pad bytes if a block oriented conversion
value is specified, otherwise NUL bytes are used.
it appears that the data is ensured to be "properly
aligned" with a possibly different block size on the
source or target media. As far as I remember, not
giving the bs= argument would result in a default
block size of 512 bytes which may - but don't ask
me why - lead to a non-functioning target USB stick.
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...
More information about the freebsd-questions