Re: [Fedora-livecd-list] Re: LiveCD wiping root partition?
On Wed, 2007-08-01 at 06:27 -0500, Douglas McClendon wrote:
Michel Salim wrote:
> Any reason why dd is preferred over, say, tar? The latter would be much
> safer. And files would not have to be moved to their final partitions after
> 'dd' too.
seeking (cdrom and disk). Lots slower (5X?). I suspect that file level copy
(tar) will be the long term answer for the flexible general case. Though I also
suspect the much faster dd will be part of the long term answer as well for the
typical case (i.e. formatting / as ext3, and no separate /usr).
For example, on my system, using the existing 4.0G dd, the copy takes 299s.
Using my turboLiveInst patch, I can shave that down to 250s. Using tar however
to copy the 85896 files, took 1247s. And you also need to throw in another 30s
or so for the format that isn't required in the dd case. Maybe(??) there is
some more efficient way to copy those 85K files than the ( tar cpsf - | tar xpsf
- ) that I used for that trial.
Yeah, I gave the copy approach a quick test before leaving for vacation
and it was taking quite a while. Still want to make sure that wasn't
due to something stupid in my test setup, but it's looking less
promising as an approach for speeding things up.
Jeremy