[mythtv-users] WAY OT: Storage designs

[Greg Oliver]

On Mon, Aug 30, 2010 at 2:22 AM, Simon Hobson <linux at thehobsons.co.uk> wrote:
> Greg Oliver wrote:
>
>> There's also no reason I could not run them both simultaneously and
>> use NFS where appropriate and iSCSI where appropriate to the same tree
>> I suppose.
>
> If you mean what I think you mean then - no you can't. iSCSI is a block
> protocol and you can't mount it more than once at a time unless you use a
> clustered filesystem - if you try then you'll get instant corruption.

You can with SCST  :)  That's the only reason I would consider it..
It allows multiple accesses to the same LUNs simultaneously as well.
I had never heard of it before, but it popped up on lkml, so I started
reading up on it..  And of course immediately wanted to try it..

> You can use NFS and iSCSI alongside each other for *different* filesystems
> on different devices, but for the same filesystem.
>
> Apart from the one thing I rather suspect you don't want to do - mount the
> block device with iSCSI and then share the filesystem out with NFS (from the
> machine doing the iSCSI mount)