Ross S. W. Walker wrote:
You can't beat dd for getting everything exactly the same regardless of
what you changed - or just splitting the mirrors and letting each sync
to new partners but then you have to reinstall grub. I prefer
clonezilla for non-raid configurations but most of the machines I care
about are configured with raid1.
Well, actually dd isn't so good in this area. dd will do the whole disk
no matter how much data is actually stored on it and for a 500GB disk
that can take a lot of time.
Sure, but it isn't human time. I just give the command and come back later.
It also doesn't take into consideration
any disk geometry differences.
I happen to have a lot of identical disks in swappable carriers.
A better way is to use kickstart script to automate a network install
and then to use dump/restore to load the user/application data back.
Sounds like more work to me. Besides figuring out the kickstart options
you need an up-to-the-minute dump made beforehand and there's always
some risk in restoring running programs unless you use a program like
rsync that creates a tmp name, then renames when complete. And there's
some work to sort out what you can restore and what you can't.
With remote access cards and vnc kickstart installs this can even be
done remotely on a headless server even without a technician present
to power it on or off.
Shipping a box of disks for someone else to swap in works for me, and it
doesn't matter if you decide to drastically change OS's between swaps.
You do have to deal with the way NIC detection has changed across Centos
versions, though.
--
Les Mikesell
lesmikesell@xxxxxxxxx
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