<div><br></div>Thanks a lot for the info..<div><br></div><div>I'm using a seagate blackarmor NAS 110 at the moment. It actually works pretty well and has been for some time, but i guess i could do with another drive or 2 since i have 2 systems and I'm actually thinking of using the other as a secondary backend if i can mythtv working stable enough.</div>
<div><br></div><div>So my thinking right now is:</div><div>OS and database on SSD (is this a must?),</div><div>add another internal HDD like seagate pipeline or constellation 2,</div><div>split storage between the 2 HDD's and the NAS.</div>
<div><br></div><div>What about transfering the files over to the NAS's to free more space on the local HDD's? Would that be preferable you think?</div><div><br></div><div>David<br><br><div class="gmail_quote">On 23 May 2012 15:30, Andre <span dir="ltr"><<a href="mailto:mythtv-list@dinkum.org.uk" target="_blank">mythtv-list@dinkum.org.uk</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im"><br>
On 23 May 2012, at 14:53, Simon Hobson wrote:<br>
<br>
> David Crawford wrote:<br>
><br>
>> However I'm sure there will be problems down the line as I have another PC setup with windows software with the same hardware and it encounters problems also when recordng many streams.<br>
><br>
> Your biggest issue will be disk seek times. Essentially, if you are recording 18 streams, then you have 18 threads which are syncing a file to disk once a second. This means the disk will be trying to do 18 seeks & writes/second - and a cursory look at the specs of most disks will reveal that this is likely to lead to a bottleneck.<br>
> It's not the basic data rate that's the issue, it's the quantity of seeks that kills performance.<br>
<br>
</div>David I also find that in general AV specific drives work much better than generic consumer drives, I have many WD AV-GP and Seagate Pipeline drives. I find I am able to record 19 simultaneous HD streams across 5 disks without expensive hardware.<br>
<br>
I also use MythTV in a broadcast environment, feel free to contact me off list if you think that would be useful.<br>
<span class="HOEnZb"><font color="#888888"><br>
Andre<br>
</font></span><div class="HOEnZb"><div class="h5"><br>
<br>
<br>
><br>
> Adding additional disks, each in a separate storage group, will spread the I/O load across multiple drives and you should have a lot less of a problem.<br>
> Eg, if you add two more drives, then you'll end up with around 6 streams/drive - if you can "about manage" now on 18, then around 6 should be no problem. Even a second drive should help.<br>
><br>
> As for using a NAS, it depends very much on it's performance. Remaining polite, some NAS boxes "perform poorly", and it also varies with access method (SMB vs NFS vs AFP vs ...).<br>
><br>
> --<br>
> Simon Hobson<br>
><br>
> Visit <a href="http://www.magpiesnestpublishing.co.uk/" target="_blank">http://www.magpiesnestpublishing.co.uk/</a> for books by acclaimed<br>
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