lvchange, change contiguous to non cont.

[AA de Boer_1]

I'm wondering if I can change a contiguous to a non-contiguous policy with lvchange while the volume is online and mounted. I know I can lvextend a volume online, but don't know about lvchange.

[Jeff Schussele · Accepted solution]

Hi,

I believe that you can do this.
But not the other way around - i.e. one can't turn on non-contiguous policy into contiguous for obvious reasons.
BUT you *cannot* perform this upon the following LVs /dev/vg00/lvol1, /dev/vg00/lvol2, or /dev/vg00/lvol3 - they MUST always remain contiguous to each other, strictly for boot purposes.

HTH,
Jeff

[James R. Ferguson]

Hi:

You should be able to make this transition as long as the volume group, to which the logical volume belongs, is not activated in shared mode.

Regards!

...JRF...

[Jeff Schussele]

Well...I'll amend my earlier post somewhat.
You can change from non-contiguous to contiguous as long as:

A) The LV is *still* contiguous
AND
B) There is contiguous free space available.

The latter will generally be highly unlikely UNLESS it's the last LV on the VG & there's still free space available at the end of the LV.

Rgds,
Jeff

[AA de Boer_1]

Thanks for all the reaction. Turned out to be all possible online (lv used as raw device). Only Oracle needs to be told separately that the extra space is available.