[mythtv] Problems with using LVM for large storage

[Scott Carroll]

> One of the main drawbacks I see to an LVM is the inability to  
> upgrade a disk.  If I want to pull a 120GB drive out of the LVM and  
> drop in a 300 GB, it might actually be possible, but a massive in  
> the arse to do.

Have you looked at EVMS?  ( http://evms.sourceforge.net/ )

It's a disk management system, developed by IBM, with a GUI and an  
ncurses frontend.  It sits on top of LVM 1 or 2 and the md drivers,  
so you can import your existing volumes.

The interface allows you to make a string of changes, check that you  
have what you want, *then* commit them to disk.  Despite a lot of  
messing around, I have yet to lose a single bit of data stored under  
EVMS.

It's support of LVM1 wasn't great (in terms of being able to move  
around extents), but LVM2 is good.  If what you're trying to do makes  
sense, the chances are EVMS will do it for you.  And there's plenty  
of clear documentation on the site.

Scott c