#8 Dumping without erasing leads to no data logged

[NeoM]

When Dumping data from my Holux M1000C, if it not followed by an erase, the gps is not logging anything more.
Need both dump and erase to log.

It should be possible to dump/backup data and keep existing data in gps and continue data logging to retrieve a bigger gps set while ensuring there is no loss of data.

* to retrieve data:
mtkbabel -p $gpsport -s 115200 -l off -f $n -w -t -x -i 2>&1 | tee -a $gpslog
* to erase gps
alias gpserase='mtkbabel -p /dev/ttyACM0 -E -r 120:30:0 -o UTC,VALID,LATITUDE,LONGITUDE,HEIGHT,SPEED,HEADING,ELEVATION,DISTANCE'

Test currently on lubuntu 12.04 with mtkbabel 0.8.3.1-1