[mythtv-users] Should I use LVM on this new raid?

Brian Foddy bfoddy at visi.com
Sat Sep 22 16:32:33 UTC 2007

On Saturday 22 September 2007, Bill Williamson wrote:
> On 9/22/07, Brian Foddy <bfoddy at visi.com> wrote:
> >Snipped complex raid/LVM setup questions
> Since it's not your boot drive I would SERIOUSLY consider using ZFS.
> Read up on it, it's an excellent filesystem from SUN which has been
> ported to FUSE (since it's not kernel compatible).
> It takes the place of mdadm and LVM AND your native filesystem
> (XFS/ext3/JFS/etc).  It can do anything you can think of.  Yes, that
> sounds silly, but it really is "that good" and getting better quite
> quickly.  It's going to be included in the next OSX release, and will
> likely be the default filesystem in next + 1.
> Example of a complex config that is easy to do in ZFS (and DOABLE with
> mdadm + xfs + LVM but harder to manage):
> -4 1TB hard drives
> -3 filesystems
> FS1: 700GB raid0 for speed (media caching drive if doing video editing?)
> FS2: 300GB raid1 for redundency (boot/system drive?)
> FS3: 2TB raid 5/6/their own equiv (for hotswap style redundancy, your
> recordings drive)
> It parcels out pieces of disk from the ZFS pool automatically and
> figures out what stripes/blocks/etc it puts where to accomidate all of
> that.  I'm a huge fan :)

I'll look into it.  I'm starting to see some limitations to my original
thinking.  First, not sure LVM will allow me to expand the 
physical volumes, which is I think what would be happening.
There is a lot more here than I expected....


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