Re: 12.04 server install LVM options
The LVM will not install to the 250GB disk unless you tell it to. But you are still looking at this little bit incorrectly.
Even if you have both disks present at install, and you install the OS to the 250GB disk and make a LVM on the 2TB disk, they are not "tied" together.
If the 250GB disk fails, of course the server will not boot since the OS is there. But the data on the LVM 2TB disk is not touched at all. Connect it to another linux machine, activate the LVM and voila, you have all the data accessible.
But you will have to use the manual partitioning option. You will make root and swap on the small disk (and any other separate partition you may want), and make one large partition on the big disk using it as physical device for LVM. After that you go into Configure LVM and set up your Volume Group and Logical Volume(s). Note, don't give the whole space to the LVs right away. Leave yourself the flexibility to make other LVs later if you choose so. You can always grow LVs size in LVM, that's the point, but shrinking is little bit more complicated.
You can install LVM later too, if you only have the small disk connected during install. You will just have to work a bit more on the command line. If you do it during installation the installer interface might be little better for you. It depends...
Darko.
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Ubuntu 18.04 LTS 64bit
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