Add device/drive to a coreStorage group?

[mimizone]

I have a DIY Fusion setup with the internal SSD and drive.
The man page of diskutil seems to say that corestorage can be used to add device/drive later to the pool.
I guess it is like LVM on Linux for instance.

CoreStorage maintains a world of virtual disks, somewhat like RAID, in which one can easily add or remove imported backing store disks, as well as exported usable volumes, to or from a pool (or several pools).

Anybody already figured out if it would be possible to add an additional drive to the existing LVG without destroying it and lose data?

I'd like to add an external drive on USB or Firewire to the LVG to extend its capacity from 1.1TB to 2TB or 3TB without having to go through that wonderful Fusion drive/OSX recovery over the internet process.

 

[mimizone]

there is a hidden addDisk verb for diskutil
http://blog.fosketts.net/2011/08/05/undocumented-corestorage-commands/

but it seems it is not working based on what I read on the Web.
I'll try tonight.
Maybe the 10.8.2 version of the Mac Mini supports it? very unlikely...

 

[mfram]

I've tried the addDisk command before. It doesn't work.

 

[mimizone]

crap.

looking forward to it being implemented by Apple!

 

[sydlow]

If anyone is needing to do this (albeit more than 10 yrs after the original question!) Confirming addDisk does work on 10.8.5 — just tested it successfully merging an empty 90.8GB partition into an existing 658.8GB CoreStorage volume, both PVs online, LV grew cleanly. One gotcha I hit: resizeVolume's 0-for-"fill everything" shortcut does NOT work on 10.8.5 — errors with "0 does not appear to be a valid disk size." You have to calculate and pass the explicit byte count instead. Wrote up the full sequence with actual terminal output here if it helps anyone: CoreStorage merging