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I've a machine with two hard drives. The first one has 80 GB and the second has 120 GB. I'm about to format this machine and install Linux, and I want to install all the main partitions (/, /boot, /usr/, etc.) on the first hard disk drive (sda) and mount the /home and /var partition on second disk (sdb).

Is this possible, and do I have to do something after the instalation? Or is the second hard disk drive automatically mounted? How can I do it?

I won't do it, but is there any problem to mount /boot on the second hard disk drive?

I'm using Ubuntu 12.04.

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2 Answers 2

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Your first question has already been answered by gluxon so no need for me to repeat it but regarding the second question -

Yes, it should be technically possible to mount /boot from a different drive, although you will need to modify the GRUB command line to reflect that, because the /boot partition by definition has the kernel image and the initramfs.

Obviously it is not recommended. If the root FS partition (/), boot partition (/boot) and GRUB are not all on the same disk then if either disk fails your machine will not boot.

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This will be something you have to do post-installation since the Ubuntu installer does not include that feature. I hate to refer to an outside source, but an excellent guide on how to do this has already been written, HOW TO: Create a separate /home partition. Good luck!

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