Re: [gentoo-user] using lvm without a partition of type linux LVM

[gottlieb@nyu.edu]

On Sat, Oct 12 2013, joost@antarean.org wrote:

> gottlieb@nyu.edu wrote:
>>The lvm handbook addendum is no longer and we are instead to use
>>the software raid + lvm2 quick install guide.
>>
>>That guide makes a few partitions of type linux raid and then puts lvm
>>on a mirrored set (more is done).
>>
>>I wasn't using raid so skipped that step and wound up with 
>>one partition as a pv in my single vg and created several lvs in that
>>vg.
>>
>>So far so good.  But I realized that the single partition that I used
>>was of type linux instead of linux lvm as I had always done when
>>following the lvm handbook addendum.
>>
>>So what, I've made plenty of mistakes before, and will surely make
>>plenty more later.
>>
>>But the resulting system works perfectly!
>>
>>If this is risky; I can reinstall.  But I wonder if any action is
>>necessary.
>>
>>What do you think?
>>allan
>
> I have done similar things in the past.
> I think the idea is that with the LVM partition type, the tools can auto detect.
> The reality is, the tools scan all the block devices.
>
> It is possible to change the partition type from Linux to LVM without
> a reinstall. I would just reboot afterwards to be safe.

Thank you and alan.

I did a paranoic version of your suggestion

boot minimal install disk
copy the lvm partitions to directories on an external disk (ext3)
change partition type
reboot onto hard disk
test
remove copies

thanks again.
allan