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From: | Chris Stankevitz |
Subject: | Re: [Discuss-gnuradio] Losing data during long collects |
Date: | Tue, 03 Jun 2008 15:01:04 -0700 |
User-agent: | Thunderbird 2.0.0.0 (Windows/20070326) |
Jeff Brower wrote:
Is there a way for you to temporarily take file-write out of the equation? I.e. can your code look at the bitstream and know if it remains continuous / intact? The "every minute or two" thing makes me suspicious that some HDD related thing is going on. 16 MBbyte/sec is around 1 GByte/minute.
Jeff,Thanks for your recommendation. I can indeed pipe the output of my "data gathering app" to the input of my GPS processor and see if the problem goes away. However, I suspect the problem is not HDD related for these reasons:
1. I'm using a 4 disk RAID0 (external eSATA) drive that supposedly can handle the throughput
2. When I was disk bound in the past, I would receive USRP overrun errors. I do not receive these errors when I am presently losing a few thousand samples out of every 480e6
CHris
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