Klaus Dittrich wrote:
> I do my backup using dd if=/dev/sda of=/dev/sdb bs=1024k.
ehh, isn't that kind of dangerous???
What if files move around on disk while dd is running? imagine that dd is in the process of copying blocks belonging to a big file "foo",
and now in the middle of this something causes "foo" (or just parts of "foo") to move to a different location - you now have a seriously screwed
copy of "foo" on the new disk...
I'd expect that all sorts of strange corruption of the copy could happen that way. I could be wrong, and maybe someone who knows more about
how the filesystems work can tell if I am, but I know for sure that I would never dare to do backups that way.
Best regards,
Jesper Juhl
juhl@eisenstein.dk
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sun Sep 30 2001 - 21:00:58 EST