EMAX question

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A question about Logs (R9)

Prior to this weekend, the last time I downloaded logs from
the R9 was on 1/20/2012.

Yesterday, I again downloaded the logs:

The first entries in SYSTEM.CVS
were on 2/14/2012 (missing the first 8 flights).

The first entries in ENGINE.CVS
were on 2/16/2012 (missing the first 8 flights).

The first entries in FLIGHT.CVS
were on 8/22/2012 (missing the first 40 flights).

Each file ended with the most recent activity.

My assumption is that this is a result of limited size
FIFO storage for the logs. I prefer not to assume, however. Is there something
else going on here?

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rdawson Members Profile Send Private Message Find Members Posts Add to Buddy List Release 9 Insiders Joined: 09 Mar 2010 Location: Daytona Beach Status: Offline Points: 14	Post Options Post Reply Quote rdawson Report Post Thanks(0) Quote Reply Topic: EMAX question Posted: 02 Sep 2012 at 5:35pm
	A question about Logs (R9) Prior to this weekend, the last time I downloaded logs from the R9 was on 1/20/2012. Yesterday, I again downloaded the logs: The first entries in SYSTEM.CVS were on 2/14/2012 (missing the first 8 flights). The first entries in ENGINE.CVS were on 2/16/2012 (missing the first 8 flights). The first entries in FLIGHT.CVS were on 8/22/2012 (missing the first 40 flights). Each file ended with the most recent activity. My assumption is that this is a result of limited size FIFO storage for the logs. I prefer not to assume, however. Is there something else going on here?

AviJake Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 26 Mar 2009 Location: Lincoln MA Status: Offline Points: 2815	Post Options Post Reply Quote AviJake Report Post Thanks(0) Quote Reply Posted: 03 Sep 2012 at 7:10pm
	No, I think you are correct in the FIFO architecture and storage limits. I'll check for sure on Tuesday and post an update.
	Steve Jacobson sjacobson@avidyne.com

AviJake Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 26 Mar 2009 Location: Lincoln MA Status: Offline Points: 2815	Post Options Post Reply Quote AviJake Report Post Thanks(0) Quote Reply Posted: 04 Sep 2012 at 9:49am
	It's not really feasible to come up with an absolute storage limit in terms of flight hours or calendar time. By way of background, we designed the various flight logs to store at least 25 flight hours of data, and that is often much bigger. As for physical sizes, Engine Log is 16 MB Events Log is 8 MB Flight Log is 44 MB System Log is 16 MB Voltage Log is 8 MB The logs are recorded in a compressed format such that duplicates between samples are not recorded multiple times. That makes an absolute “time” metric a bit more complex.
	Steve Jacobson sjacobson@avidyne.com

rdawson Members Profile Send Private Message Find Members Posts Add to Buddy List Release 9 Insiders Joined: 09 Mar 2010 Location: Daytona Beach Status: Offline Points: 14	Post Options Post Reply Quote rdawson Report Post Thanks(0) Quote Reply Posted: 18 Oct 2012 at 10:02am
	Ok – a new question. In the subsequent download of logs from my R9 system. C_SYSTEM.CSV and C_FLIGHT.CSV were normal but there was a discrepancy with C_ENGINE.CSV. Normally, the first few lines of the .CSV file are: Line 1 A series of text column headers Line 2 <<<< ** POWER ON >>>> (Sometimes there are a couple of line with data in some columns before the power on line.) In the file I downloaded, the first two lines were Line 1 <<Incremental extract>> Line 2 <<<< POWER ON ** >>>> The missing column headers apparently result in engine data not being processed by CirrusReports.com. Was there something I did wrong in the download process? Is it likely that the file can be repaired by copying the headers from an earlier file? Thanks for the help.

AviJake Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 26 Mar 2009 Location: Lincoln MA Status: Offline Points: 2815	Post Options Post Reply Quote AviJake Report Post Thanks(0) Quote Reply Posted: 18 Oct 2012 at 6:53pm
	Our guy who has the most experience with this suggests you can try to cut and paste previous known good headers into the file. Hie thinks your compact flash card may be corrupted but let's try the cut & paste exercise first. Fingers crossed.
	Steve Jacobson sjacobson@avidyne.com