isfs6_20110113_000000.dat is corrupt for some reason.
When one does an rsync, the following are reported on isfs6:/var/log/isfs/messages
Jan 15 23:15:55 isfs6 rsyncd[854]: rsync: read errors mapping "PCAPS/raw_data/isfs6_20110113_000000.dat" (in data): Input/output error (5)
So that it doesn't get in the way of successive rsyncs, I moved it to isfs6:/media/usbdisk/projects/PCAPS/bad
I was able to clear our most of the junk with:
sensor_extract -s 6,30 -s 6,100 -s 6,20 -s 6,50 -s 6,0x8000 -s 6,40 -s 6,80 -l 0 isfs6.dat isfs6_20110113_000000.dat nidsmerge -i isfs6.dat -o isfs6x.dat -s "2011 01 13 00:00" -e "2011 01 13 12:00" sensor_extract -s 6,30 -s 6,100 -s 6,20 -s 6,50 -s 6,0x8000 -s 6,40 -s 6,80 -l 0 isfs6xx.dat isfs6x.dat bzip2 /scr/tmp/maclean/isfs6xx.dat -c > isfs6_20110113_000000.dat.bz2
The real-time file for isfs6 for that day looks quite complete, so I don't think we have lost much, if anything.
We'll see if we have any other problems on the usb flash drive at wslope6.
The glitch doesn't seem to have anything to do with a sudden power down, wslope6 has been up for 23 days.