On Wed, Sep 30, 2009 at 05:08:05AM +0200, Polytropon wrote: > Forgot to mention this: > > > On Tue, 29 Sep 2009 22:23:00 -0400, PJ <[email protected]> wrote: > > 1. will the s1a slice dump the entire system, that is, the a, d, e, f > > and g slices or is it partitions? > > The ad0s1 slice (containing the a, d, e, f and g partitions) can > be copied 1:1 with dd. By using dump + restore, the partitions > need to be copied after another. In each case, the entire system > will be copied. For this purpose, even the long lasting > > # dd if=/dev/ad0 of=/dev/da0 bs=1m > # dd if=/dev/ad0 of=/dev/da0 bs=512 count=1 > > method can be used. >
It can be used, but it is not a good way to do it. That is because it copies sector by sector and the new disk/filesystem may not match the old exactly. Besides when it is newly written on a file by file basis, it can be more efficiently laid out and accomodate any changes in size and sector addressing. dd cannot do that. ////jerry > -- > Polytropon > Magdeburg, Germany > Happy FreeBSD user since 4.0 > Andra moi ennepe, Mousa, ... > _______________________________________________ > [email protected] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "[email protected]" _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[email protected]"
