[mythtv-users] OT: LVM, partitioning over multiple drives

[Les Gondor]

At the cost of the aggregate space not being the sum of the capacity of 
the individual drives, the only way to get complete fault tolerance is 
to make the volume a RAID-1 or RAID-5 configuration. Since you are 
already at capacity on at least one spindle, I'm guessing that mirroring 
will cost too much in terms of capacity to be viable for you. I don't 
know what the minimum number of spindles are for LVM RAID-5, but for N 
drives of size S, the capacity will be (N-1)*S. I would count on at 
least 4 drives being needed for RAID-5.

Cheers,
Les Gondor

Michael Knoll wrote:
> My video collection has expanded over multiple harddrives, and
> currently I'm using a symlink farm to unify the collection.  I was
> looking into LVM to join the drives into one partition, but I am
> concerned about the risk of failure.  If I join the two drives into
> one partition, I've added the failure risk.  Now either drive has to
> fail to lose all my data, rather then one drive fail to lose half my
> data.