Re: lvm on a single big partition or just a single big partition?
On Wed, Jun 03, 2009 at 11:44:00AM -0500, Zhengquan Zhang wrote:
> Though I have used lvm for some time, I have one question that I don't
> understand.
>
> For one harddrive I often create a /boot parition that is not lvm and
> create a huge partition on the rest of the harddrive for PV of lvm. Now
> I am thinking what is the difference between doing partition like this
> and just a single big partition without lvm?
With one big partition, you lose the ability to:
- have a separate /var (or /var/log) to keep logs from
filling up /
- have different mount options (e.g. noexec, nodev) on
/home
- have a separate /home
Without LVM, you lose the ability to :
- resize partitions as needed
- migrate data from one disk to another, e.g. if a drive
starts misbehaving but you need to keep the system live
rather than reinstalling/restoring.
Instead of a separate /boot, I often use a separate / (which contains
/boot). In this way, the / partition isn't part of LVM (I make it 500
MB and usually only have under 200 MB used) and can be booted into if
the need arises, with more tools available than within the initrd. Most
of my boxes won't boot a live CD.
Doug.
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