On Sun, 2006-05-07 at 14:32, Mikkel L. Ellertson wrote: > > > Well, if you are using dd to copy a working disk image, you are > going to have to make more changes anyway. You may have problems > with the host name, depending on how it is set. Normally I clone a machine set for DHCP so it can be brought up anywhere and an appropriate name address assigned later (the destination may not be known at the time it is copied). > You may also have a > problem in that the MAC address of the NIC will not match the one in > the ifcfg-eth? script and/or /etc/iftab (Depending on the > distribution.) Yes, burying the MAC address in an obscure config file is a bad idea as well, and the way it was handled could have caused me some serious trouble if I hadn't caught on by accident. I've forgotten the version and update level but at some point the network-config program started squirreling away the MAC address but not paying much attention to it. So, I deployed a bunch of machines where the last step after cloning was to boot the disk locally to set the hostname and IP address, then the SCA disks and carriers were shipped to remote locations and swapped into the machines where they were intended to run. Everything worked fine, time passed, updates happened, and then after some update, a machine falls off the network. Turns out that the update changed the init script behavior so that those config files with mismatching MAC addresses were ignored. Fun stuff... And of course I couldn't duplicate the problem on my local box which was an exact copy of what was deployed. I was just lucky that the first one updated was at a nearby location and I went over and hooked up a monitor to find that refusing to start the network was intentional. > The use of labels was started because there were too > many newbies that would move the drive, and then not be able to boot > it. One common problem was where they would have two drives, in the > machine, one with Windows and one with Linux with Linux on a drive > other then the Windows drive. Then they would decide to move the > Linux drive to its own machine, and it would not work. When using > labels, all you have to do is re-install the boot loader, and maybe > tweak the config for it. When using the actual devices, you have to > edit /etc/fstab as well. So as long as you only ever have one fedora/rh/centos installation this won't break anything. What was the plan for later, when people have more than one drive and connect them together? > I feel that the default install should make things as easy as > possible for a newbie, doing a normal install, and have the advanced > options for when you are not doing a standard install. What is it about refusing to boot when duplicate labels are seen that you think is newbie-friendly? An option or default to continue, using one or the other would be friendly. Crashing is not friendly. > If you are > not doing a standard install, expect to have to use some of the > advanced options. Installing on one machine, and cloning the install > is NOT a standard install! It could be. There is nothing about making the machine cloneable that makes it less useful or handy in the initial install. Everyone, even a newbie, should be able to back up and restore their machine which is essentially the same thing, especially if you restore to different hardware. > Now, one change that would help is the way duplicate labels are > handled. Right now, the last label found of the duplicates found is > used. Not unless it has recently changed. I've never been able to boot a machine with duplicate root labels. -- Les Mikesell lesmikesell@xxxxxxxxx
