[mythtv-users] ZFS anyone? Need to move off ZFS Myth machine and not sure what to do..
markhsa at gmail.com
Thu Oct 13 20:45:28 UTC 2011
On Thu, 2011-10-13 at 16:43 -0400, Brian J. Murrell wrote:
> On 11-10-13 04:30 PM, Mark wrote:
> > The existing ZFS is spanned across 5 2TB drives. I could simply plug
> > them in on a new machine if ZFS were supported.
> > Right now, Myth on Fedora, all storage is NFS to a FreeNAS box that has
> > the 5 drives. I need to move that storage local to the Myth box.
> > Trying to avoid a big data move and buying drives to move into as I cant
> > destroy the FreeNAS-ZFS system until the data is gone.
> You'd need at most 1 new 2TB drive and that's assuming your 5x2TB ZFS
> filesystem is more than 80% full. If you can get it down to 80% or
> less, you shouldn't even need any new drives since...
> Surely one of ZFS' fancy-pants features is that it lets you remove a
> drive from a filesystem without a loss of data -- assuming there is at
> least as much space free as the size of that disk you want to remove.
> If you can remove a drive (again, assuming you have the space free to do
> it) you remove it (if not, this is where you will need the one new 2TB
> drive), move it to your myth box, create an ext4 filesystem on it, put
> it into a storage group and then move 2TB of recording off of ZFS on
> that disk.
> Doing so will free up another 2TB of disk on your ZFS filesystem
> allowing you to remove a second drive. Move it to your myth box, put
> ext4 on it and move another 2TB from your ZFS filesystem. Rinse and
> repeat until you have all of your drives independent and in a storage
> group. If you had to buy a new 2TB drive to accomplish it, you probably
> needed it anyway. :-)
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I did not think of moving it in a staged approach like that.
Thanks for the input. That is likely exactly what I will do.
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