[linux-lvm] expanding physical disks
Hugo Lombard
hal at mailgate.net
Fri Jun 15 15:57:38 UTC 2001
On Fri, Jun 15, 2001 at 04:51:35PM +0200, Heinz J. Mauelshagen wrote:
> On Fri, Jun 15, 2001 at 04:11:51PM +0200, Hugo Lombard wrote:
> >
> > If you're using LVM primarily as a way to make it possible for you to
> > expand your storage space on-line (and on-mount-point) wouldn't it be
> > "easier" to _just_ use the RAID? i.e. expand the RAID volume on the
> > controller, so basically the "disk" is bigger now, and the just "grow"
> > your partition, extend your filesystem, and that's it?
>
> I think you're right in case you can live with the restrictions involved.
>
I'm right!?!?! Mother would be so proud!! ;)
> If the amount of resizable volumes a single smart controller can support is
> enough, you can surely go with that solution. When it comes to more storage
> you need a logical volume manager to group multiple disk subsystems together
> in order to support large storage configurations.
>
*nod* As usual, there's no universal answer, and it depends on you
needs/configuration/preference/phase of moon...
> >
> > It's a thought I've been toying with since seeing the IBM ServeRAID's
> > capability to grow volumes. I've not attempted any testing though, so
> > this is pure speculation...
> >
> > (PS: All this means nothing if you're using LVM for it's other
> > features, like striping, but then the RAID can do that too...)
>
> Plus LVM's features to move data around online in order to relocate it to
> faster/bigger/newer disk subsystems, to have more that just a couple of
> resizable devices, support for hardware block device reconfiguration without
> any changes in the namespace of the logical volumes, snapshot support etc.
>
Very important features to consider, for sure.
--
Dorothy: But how can you talk without a brain?
Scarecrow: Well, I don't know... but some people without brains
do an awful lot of talking.
-- The Wizard of Oz
---------------------------------------------------------------------------
Hugo Lombard Infoline (Pty) Ltd
System Administrator
---------------------------------------------------------------------------
More information about the linux-lvm
mailing list