best approach to clone a disk?
letter2steve at yahoo.com
Wed Feb 15 11:40:48 PST 2006
--- Joe Auty wrote:
> Thanks Steve, but this is exactly the same script I've been using all
> along, while in Single User Mode.
> However, could you explain the zeroing of blocks, and what its
> purpose is for? Does this solve the problem of space being lost when
> cloning a disk to a larger disk?
Sorry, you mentioned Freesbie and I assumed you had not used dump under your FreeBSD install
Now that I think about it, I was getting errors like yours when I was first learning this script
I remember having to adjust it to taste
Have a look at your fstab (cat /etc/fstab) and ensure the scripts references to your FreeBSD
slices match your system.
In the script I sent you, my clone destination disk was ad2 so you will need to look at that as
Don't worry Joe, you are very very close
Regarding zeroing empty or unused blocks, have a look at this
Regarding space lost cloning to a larger disk, zeroing unused blocks wont help that. Imagine your
10GB FreeBSD hard disk is cloned with G4U to a 20GB hard disk. It will probably work great but
your 20GB disk is only half full. You will have to use growfs to expand a slice or create a new
partition to reclaim the empty space. Sorry, I have not tried this yet and have no experience.
In cloning to a bigger disk, I prefer the dump/restore script method as I get to fully utilize the
larger disk capacity
I hope this helps
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
More information about the freebsd-questions