NAS for recording DVB-S2

NAS for recording DVB-S2

[JPT]

Hi,

I want my NAS to record from USB DVB-S2.

It will be a Netgear ReadyNAS 102 or 104.
It has got an ARM HL cpu, so do the DVB drivers in general work on ARM
systems?

I compared prices and supported devices list.
The result is:
I should buy either a Tevii S660 or a Terratec Cynergy S2 Stick.

I don't want to have another power supply, so I am going to "steal" the
power from the nas somehow.
The Tevii uses 7,5 V which is odd...
I cannot find the voltage the Terratec requires. Does anyone own one?

Is Terratec a good choice regarding drivers?

I am going to compile the kernel myself because no builds are available
for the ReadyNAS.
There is a guy who already put the patches for the ReadyNAS DuoV2
upstream into kernel 3.10: http://natisbad.org/
Currently he is working on the 102/104...
unlike me, HE knows what he is doing ;)

thanks,

Jan

Re: NAS for recording DVB-S2

[Jannis]

Hi,

Am 22.10.2013 10:24, schrieb JPT:
> I want my NAS to record from USB DVB-S2.
> [...]
> I should buy either a Tevii S660 or a Terratec Cynergy S2 Stick.
> 
> I don't want to have another power supply, so I am going to "steal" the
> power from the nas somehow.
> The Tevii uses 7,5 V which is odd...
> I cannot find the voltage the Terratec requires. Does anyone own one?

Yesterday I recommended the Technisat SkyStar USB HD to s.o. else on
this list. Though I'm not beeing employed by or affiliated with
Technisat, you might also want to consider it:
http://www.linuxtv.org/wiki/index.php/Technisat_SkyStar_USB_HD
The driver is in mainline kernel (no patching' around), should work well
with ARM (If you want me to test it, I could. There are several
ARM-boards (armv6j-hf, armv7-hf) floating around here, I just didn't yet
bother to try).

The power-supply reads 12V, 1.5A for one device. As you didn't state at
what voltage your NAS runs at, it might just fit or be too high (the 12
Volts) for your application. I have a slightly larger NAS (more a less a
full blown PC with low-enery components) and I power two of the
technisat's off the PC's power supply's 12V rail.

And about the price: it looks like that one is even cheaper than the two
you proposed.

Best regards,
	Jannis

Re: NAS for recording DVB-S2

[Honza Petrouš]

2013/10/25 Jannis <jannis-lists@kripserver.net>:
> Hi,
>
> Am 22.10.2013 10:24, schrieb JPT:
>> I want my NAS to record from USB DVB-S2.
>> [...]
>> I should buy either a Tevii S660 or a Terratec Cynergy S2 Stick.
>>
>> I don't want to have another power supply, so I am going to "steal" the
>> power from the nas somehow.
>> The Tevii uses 7,5 V which is odd...
>> I cannot find the voltage the Terratec requires. Does anyone own one?
>
> Yesterday I recommended the Technisat SkyStar USB HD to s.o. else on
> this list. Though I'm not beeing employed by or affiliated with
> Technisat, you might also want to consider it:
> http://www.linuxtv.org/wiki/index.php/Technisat_SkyStar_USB_HD
> The driver is in mainline kernel (no patching' around), should work well
> with ARM (If you want me to test it, I could. There are several
> ARM-boards (armv6j-hf, armv7-hf) floating around here, I just didn't yet
> bother to try).

>From linux perspective, the ARM architecture is very stable. At least
I have never had any problem running anything on linux-arm devices.
For you solution you have to check if USB subsystem on your device
is working stable enough, especially if you are sharing the same
USB bus with other speedy devices (like external hard drive or so).

/Honza

Re: NAS for recording DVB-S2

[JPT]

Am 25.10.2013 09:46, schrieb Honza Petrouš:
> 2013/10/25 Jannis <jannis-lists@kripserver.net>:
>> Hi,
>>
>> Am 22.10.2013 10:24, schrieb JPT:
>>> I want my NAS to record from USB DVB-S2.
>>> [...]
>>> I should buy either a Tevii S660 or a Terratec Cynergy S2 Stick.
>>>
>>> I don't want to have another power supply, so I am going to "steal" the
>>> power from the nas somehow.
>>> The Tevii uses 7,5 V which is odd...
>>> I cannot find the voltage the Terratec requires. Does anyone own one?
>>
>> Yesterday I recommended the Technisat SkyStar USB HD to s.o. else on
>> this list. Though I'm not beeing employed by or affiliated with
>> Technisat, you might also want to consider it:
>> http://www.linuxtv.org/wiki/index.php/Technisat_SkyStar_USB_HD
>> The driver is in mainline kernel (no patching' around), should work well
>> with ARM (If you want me to test it, I could. There are several
>> ARM-boards (armv6j-hf, armv7-hf) floating around here, I just didn't yet
>> bother to try).

Thanks, I will give it a try.
This device wasn't listed at my favorite price comparison agent, only
the successor "TechniSat SkyStar USB 2 HD CI" (which doesn't work with
linux) at nearly double price.

I think I will trust both your statements that it's likeley to work, so
it's not necessary to test. Thanks. :)

>> The power-supply reads 12V, 1.5A for one device. As you didn't state at
>> what voltage your NAS runs at, it might just fit or be too high (the 12
>> Volts) for your application. I have a slightly larger NAS (more a less a
>> full blown PC with low-enery components) and I power two of the
>> technisat's off the PC's power supply's 12V rail.

12 V should be fine. Any device powering hard-drives should offer 12 V
somewhere.

> From linux perspective, the ARM architecture is very stable. At least
> I have never had any problem running anything on linux-arm devices.
> For you solution you have to check if USB subsystem on your device
> is working stable enough, especially if you are sharing the same
> USB bus with other speedy devices (like external hard drive or so).

great, thanks!
I won't have any other devices attached that generate a lot of traffic.
I believe USB 2.0 and USB 3.0 busses are separate, so it would be a good
solution to use one for DVB and the other for anything else in case
problems occur.
Currently there doesn't exist a kernel for the NAS yet, so I cannot test.

regars,

Jan

Re: NAS for recording DVB-S2

[Jannis]

Am 25.10.2013 11:57, schrieb JPT:
> I think I will trust both your statements that it's likeley to work, so
> it's not necessary to test. Thanks. :)

Since I'm a curious person, I tried it myself today. The SykStar USB HD
works on my hardkernel ODROID-U2 (Cortex-A9 Quad) after I added the
driver to the kernel. Furthermore, the parameter "coherent_pool=6M"
needed to be added to the kernel's command line since there were kernel
errors otherwise. Since then, everything works as expected. Channel
scan, SD and HD programs as well as complete MPEG2 transport streams
(well, the TS is filtered in software anyways). All tested using
gstreamer-1.2 and dvbsrc.

Best regards,
	Jannis