[mythtv-users] 2 Backends, 1 backend use the serial port of the other?

Kevin Kuphal kuphal at dls.net
Mon Dec 19 01:30:31 EST 2005

Jason Sharpe wrote:

> Hello!
> I am 98% done with my mythtv whole house setup! I have learned alot 
> and look forward to tweaking this sucker out!
> I have 2 standalone backends, the master has a DCT3200 via firewire 
> and a HD-3000 (OTA) in it. Both inputs working pretty flawlessly 
> (knock on wood). I intend to have the master hold all of the 
> recordings from the 2 BEs (about 1TB in the master so that should be 
> enough for now)
> I wanted to setup a slave BE to do all the transcoding, Comm flagging, 
> nuvexport etc so the master BE can focus on recording. I find that 80% 
> of my recordings take place on nights and weekends  along with 100% of 
> the viewing at the same time so why not let the slave do the other 
> tasks while the master is hard at work recording and serving to the 
> frontends.
> One of the last steps of this entire project is turning off the TiVo 
> (YAY!) and moving my DishNetwork receiver onto myth. I have read of 
> the headaches of getting a HD-3000 (using DVB drivers) and a PVR-250 
> working in the same box so I installed a PVR-250 into the slave BE.
> To start, I am not running LIRC on any frontend or backend for remote 
> control use. I have PS/2 IR keyboards and learning remotes to make it 
> easy. (that way I can whip out the IR keyboard and use it to browse 
> the web/email when I I don't want to fire up my laptop.)
> I have a serial IR blaster from www.irblaster.info 
> <http://www.irblaster.info> that I need to use to control the 
> DishNetwork box. My issue is that the slave BE does not have a serial 
> port on it. However my master BE sits right next to the slave and it 
> does have a serial port. I have LIRC working on the master and 
> blasting correctly using /dev/lircd.
> Being a linux newbie I am probly asking a basic question, but with the 
> PVR-250 in my slave BE is there a way to have my slave BE use the 
> serial port on my master BE to blast to control the DishNetwork box?
> Again being a newbie I tried NFS just for fun and when I tried to 
> mount /dev/lircd on the slave it it failed, but I didn't expect it to 
> work (exact error was "mount: failed, reason 
> given by server: Not a directory")
> I have a USB to Serial dongle that I could use, but from what I have 
> read, that wouldn't work with the blaster I have and with LIRC. (or am 
> I wrong?)
> I guess the last resort would be to put the HD-3000 in the slave BE 
> and the PVR-250 in the master, but with an hour of HD using 8gig, I 
> figure it would be best to leave it in the master so the slave doesn't 
> have to try to push that large amount of data over the network to 
> store it on the master.
I'm reasonable sure you can't do what you're trying to do, but I also 
can't imagine you are out of PCI slots on your slave backend.  In that 
case, why not just get this?



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