Follow-up install questions

Adam Vande More amvandemore at
Thu Oct 15 13:34:12 UTC 2015

On Thu, Oct 15, 2015 at 7:42 AM, William A. Mahaffey III <wam at>

> Pursuant to ongoing issues trying to install FreeBSD 9.3R on my Myth-TV
> box, I have some questions about provisioning another box, also w/ 9.3R.
> That box is AMD A-10 APU based, w/ 8X 1 TB 2.5" HDD's. Given the problems I
> am having getting the (smaller, simpler box) going. I am pondering using
> ZFS on the larger box. To that end, I have a couple of questions. ZFS
> supports (man page) 'unmirrored pools'. Is that tantamount to striped RAID
> ? If so, what sort of I/O performance can I look for there ? There was a
> lengthy thread a few weeks ago on ZFS & performance. I (think I) recall
> someone saying they used a bunch of 1-HDD vdevs to get some semblance of
> good I/O performance w/ a RAIDZn configuration, is that (additional layer
> of config) actually required ? My man page says vdev's can be single
> devices or 'a collection of devices', with devices being disks (individual
> HDD's ?), files, mirrors, or raidz's. Are those mirrors necessarily ZFS
> mirrors, or can they be gmirrors ? I am interested in maximizing the size
> of the storage pool available, & the best I/O performance I can get. This
> box will be backed up across the LAN onto other boxen, so I am worrying
> less about HDD reliability & more about performance & max available
> GiB's/TiB's. TIA & have a good one.

Why is speed such a concern for you?  A single SATA is easily enough to
read and write multiple 1080p streams concurrently.

What do you have against white space? It's too painful to read further.


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