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In Reply to: RE: Any failure of hard disks in your NAS ? posted by Tony Lauck on November 19, 2014 at 09:58:39
Hi and thanks for the advice
I have been able to connect the main pc with an ethernet cable to the router (no wifi i mean).
Only the secondary system is through wifi in the bedroom (just background listening when i write with the pc)
I am not an expert but i guess your solution is indeed the ultimate and the best one
I do not know if tests with HD video files can tell something about the quality of the playback system.
For now i do not get any drop out or problem
My idea is to add a 2nd SSD and to read the files from that
I read 3 Gb/s on the SSD . It's a lot indeed.
I like the SSD so much and i think that something spectacular is going to happenhttp://www.zdnet.com/toshiba-launches-smallest-embedded-nand-flash-products-to-date-7000034281/
a 128 GB NAND chip of about 0.5"x0.5" size (!)
http://cdn-static.zdnet.com/i/r/story/70/00/034281/screen-shot-2014-10-02-at-10-03-51-458x330.png?hash=BGAvMJZ2MG&upscale=1
Thanks again.
Kind regards,
bg
Edits: 11/19/14 11/19/14 11/19/14 11/19/14Follow Ups:
They will fail one day.
Hopefully your active HD and your backup will not fail on the same day.
I once forked out an additional 50,- for a true 7x24 HD for my NAS.
It crapped out after 2 years.
Ordered a new “normal” one, restored from my second NAS and within 2 weeks the other NAS had a HD failure as well.
What you need is a good so really paranoid backup system
The Well Tempered Computer
Hi and yes you are right of course
If safety of data is paramount a serious back-up solution is the way.
Still i was a little surprised to see such low figures
But the stress for the HD mechanisms working 24/7 must be really huge
Poor disks ...
Thanks a lot for your advice.
Kind regards,
bg
I appreciate the fact that network traffic takes some CPU power, but I don't share Tony's concern about network processing load. Here's the CPU history for my i7-860 based server uncompressing FLAC and sending two independent music streams to Touch players, one via ethernet and the other via Wi-Fi:
Every once in a while the total will *spike* to 1%. Now, if you really want to exercise your processor, use Handbrake to convert a video file for use on a Mac product. :)
Hi and thanks a lot ! very interesting
Really impressive the cpu work for video tasks ...
I wonder if, as an extension, High Definition video files can be used to assess the quality of a streaming
I mean, if the streaming with this heavy files is very good streaming of audio should not be an issue.
Am i right ?
I have to find some of these very big files to test my little nas system
and in general all the peripherals.
Thanks again.
Kind regards,
bg
I mean, if the streaming with this heavy files is very good streaming of audio should not be an issue.
Am i right ?
Seems resonable to me. I played a hi-def video on my laptop that lives on my server. While network utilization increased, CPU usage bumped 1% just a bit more frequently. Much like Abe's test simultaneously downloading three large files. I think the underlying question has to do with the CPU used. My previous 2002 circa Pentium could be slammed by most any application. The i7 actually has similar drystone and whetstone performance to the classic Cray 2 supercomputer. BTW, if you're interested in relative CPU benchmarks, I find this site to be pretty useful.
As for Handbrake , I don't have any other application that comes even close to fully utilizing all CPU cores simultaneously. Not Flight Simulator. Not Starry Night Pro that has to render the universe. The writers must have spent some time optimizing the code to get that kind of efficiency. It sure knows how to crunch numbers!
Hi and thanks a lot again for the very valuable advice
I will test my cheap LAN with some HD video files soon.
" The i7 actually has similar drystone and whetstone performance to the classic Cray 2 supercomputer "
wow ! this is impressive and speaks a lot about the technology improvements. Amazing i did not know this.
Thanks again.
Kind regards,
bg
I tend to agree with you when talking about modern computers.
Unless you're servicing a lot network traffic, which is hardly the case when streaming music or video, or downloading a couple files, the network load is going to be very light on system resources.
Several years ago we began to see TCP Offload Engines (TOE) on server class NICs in high traffic environments. It wasn't uncommon to pay several hundred dollars for these NICs which freed up CPU resources under heavy network load. I'm not sure if TOE has trickled down to onboard chips and ports found on typical PC motherboards.
Obviously a low powered low-end system will be more impacted by network traffic so unless your system is one of those stripped down minimalist boxes I don't see a problem.
In any case, I'm downloading a few huge HD video files on my Mac and it appears they hardly put a dent in my system resources.
Downloading 3 Movies
System Resources Hardly Dented by the simultaneous downloads
The load isn't going to break the CPU or cause stuttering. However the associated processing activity may degrade sound quality if the periodic noise generated by protocol processing and data buffer movement reaches analog equipment in the DAC and amplifiers. There are probably ways to measure this activity, but you will have to listen to sound quality to tell the extent that it matters. This situation is roughly similar to what happens when playing FLAC vs. playing WAV files.
You may also want to look at the Processes tab, including system processes.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
if the periodic noise generated by protocol processing and data buffer movement reaches analog equipment in the DAC and amplifiers.Understood. If you want to get really granular and run resource manager, one finds that the total system load is runs decimal fractions of one percent - which gets rounded up to one.
I certainly appreciate the need for system and power supply isolation. I run two dedicated 20A lines to the main system and employ shielded power cords with every component. The server is located on a different floor and on a completely separate breaker box than the system upstairs.I have two pretty decent systems and find they provide better resolution than the CDPs the Touch players/DACs replaced. System details available if you click my moniker.
Edits: 11/19/14
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