Sensing aluminum foil, counting laps

Good Afternoon,
I am a middle school teacher and some of my students are working with the NXT Mindstorms kit.  Our task is to follow a black line around a course for 2 laps and stop on the start/finish line.  We spoke with other schools and were told the best strategy would be to have the robot follow the line and count/ detect each time it passes the foil. When it has detected the foil the 2nd time it should stop.
Well, they have successfully gotten it to follow the line (forever)  Their first idea was to time the robot for one lap, and run the motors long enough to complete 2 laps.  This has proven a little inconsistent.  So...
Our question is this: How do we get the light sensor to recognize and count a lap each time it senses the foil?  They have played with the sensor and when on white paper it indicates a "reflective #" between 48-54.  When the sensor is over the black line the "reflective #" is in the 30's; and when on the foil the sensor reads in the high 50s to low 60s.  We can see on the programming screen that there is an input for count, but it is ghosted over and we cannot change anything.  (we looked on the lego help pages, and there was something about a "data wire" but we did not know where or how to connect it.)
Any assistance you can offer would be greatly appreciated. 
I apologize in advance if this not the forum for this type of question.
Thanks very much
Dave T

Hi,
I am far from an NXT expert, but here are two ideas.
1. When you open up the Light Sensor VI or Block, you notice at the bottom where you can set the thresholds?  Have you thought of setting up a loop (or nested loops) that contains Greater Than and Less Than values that oyu have measured for the White Background, Black Line and Al. foil?   It will take some thought on the part of your students, butI believe you can accomplis what you want this way.
2.  GoTo the string in this forum entitled " Teaching LabVIEW to engineering students: is the NXT Toolkit recommended? " There is a link to Labs that you can download , Lab 5 goes into the light sensor.

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    2012/12/27.22:00:45 (amh) returning from qdv__automount_in_mh
    2012/12/27.22:00:45 ---
    2012/12/27.22:00:45 No volume could be found in SL500 (for drive HPLTO4_5) to use for job 38721.1.
    2012/12/27.22:00:45 The problem using HPLTO4_5 and the volume it contains, if any, is
    2012/12/27.22:00:45 device reported incorrect serial number (OB tools)
    2012/12/27.22:01:42 ______________________________________________________________________
    2012/12/27.22:01:42
    2012/12/27.22:01:42 Transcript for job 38721.1 running on cores2-dm-1
    2012/12/27.22:01:42
    2012/12/27.22:01:42 ***0 wst__set_mode: bus 7, target 500104, lun 0: HP,Ultrium 4-SCSI,H64S
    2012/12/27.22:01:42 ***0 wst__get_sn: code=0x0
    2012/12/27.22:01:42 ***0 wst__info: infolen=0xd8, info=0xffffffff7fffecc8
    2012/12/27.22:01:42 ***0 wst__dev_state...
    2012/12/27.22:01:42 ***0 wst__exec: op=0 (nop), buf=0x0, count=1 (0x1), parm=0x0
    2012/12/27.22:01:42 ioctl_op=0x7703, to=30, datalen=0x0, buf=0x0
    2012/12/27.22:01:42 cdb: 00 00 00 00 00 00 tur
    2012/12/27.22:01:42 ***0 wst__get_sense(int) cmd = 0, sense data:
    2012/12/27.22:01:42 70 00 02 00 00 00 00 10 00 00 00 00 3A 00 00 00
    2012/12/27.22:01:42 94 50 00 00 00 00 00 00
    2012/12/27.22:01:42 ec=0, sk=not ready, asc=3A, ascq=0
    2012/12/27.22:01:42 error is: device offline (OB scsi device driver)
    2012/12/27.22:01:42 flags: (none)
    2012/12/27.22:01:42 ***0 wst__exec: rval=-1, status.code/resid/checks=0x20008116/0x0/0x0
    2012/12/27.22:01:42 ***0 wst__dev_state: state=0x10000000 (offline, not at bot)
    2012/12/27.22:01:42 ***0 wst__encryption_is_tape_encryptable...
    2012/12/27.22:01:42 ***0 wst__encryption_check...
    2012/12/27.22:01:42 ***0 wst__exec: op=17 (raw_op), buf=0x1002418c0, count=44 (0x2c), parm=0xffffffff7fffe488
    2012/12/27.22:01:42 ioctl_op=0x7705, to=30, datalen=0x2c, buf=0x1002418c0
    2012/12/27.22:01:42 cdb: A2 20 00 10 00 00 00 00 00 2C 00 00 security protocol in
    2012/12/27.22:01:42 i/p data:
    2012/12/27.22:01:42 0000: 00 10 00 28 09 00 00 00 00 00 00 00 00 00 00 00 ...(............
    2012/12/27.22:01:42 0010: 00 00 00 00 01 00 00 14 3A 14 00 20 00 0C 00 20 ........:.. ...
    2012/12/27.22:01:42 0020: 09 00 00 00 00 00 00 00 00 01 00 14 ............
    2012/12/27.22:01:42 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:01:42 ***0 wst__encryption_check - have hardware encryption.
    2012/12/27.22:01:42 ***0 wst__encryption_is_tape_encryptable - no
    2012/12/27.22:01:42 ***0 wst__exec: op=6 (modesen), buf=0x100242794, count=12 (0xc), parm=0x0
    2012/12/27.22:01:42 ioctl_op=0x7705, to=30, datalen=0xc, buf=0x100242794
    2012/12/27.22:01:42 cdb: 1A 00 00 00 0C 00 mode_sen, cnt=12, pc=0, pcode=0
    2012/12/27.22:01:42 i/p data:
    2012/12/27.22:01:42 0000: 0B 00 10 08 46 00 00 00 00 00 00 00 ....F.......
    2012/12/27.22:01:42 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:01:42 ***0 wst__exec: op=6 (modesen), buf=0x100242794, count=28 (0x1c), parm=0xf
    2012/12/27.22:01:42 ioctl_op=0x7705, to=30, datalen=0x1c, buf=0x100242794
    2012/12/27.22:01:42 cdb: 1A 00 0F 00 1C 00 mode_sen, cnt=28, pc=0, pcode=f
    2012/12/27.22:01:42 i/p data:
    2012/12/27.22:01:42 0000: 1B 00 10 08 46 00 00 00 00 00 00 00 0F 0E C0 80 ....F...........
    2012/12/27.22:01:42 0010: 00 00 00 01 00 00 00 01 00 00 00 00 ............
    2012/12/27.22:01:42 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:01:42 ***0 wst__exec: op=18 (log_sense), buf=0x100242794, count=76 (0x4c), parm=0x71
    2012/12/27.22:01:42 ioctl_op=0x7705, to=180, datalen=0x4c, buf=0x100242794
    2012/12/27.22:01:42 cdb: 4D 00 71 00 00 00 00 00 4C 00 log_sense, cnt=76, pc=1, page_code=0x31
    2012/12/27.22:01:42 i/p data:
    2012/12/27.22:01:42 0000: 31 00 00 20 00 01 40 04 00 00 00 00 00 02 60 04 1.. ..@.......`.
    2012/12/27.22:01:42 0010: 00 00 00 00 00 03 60 04 00 00 00 00 00 04 60 04 ......`.......`.
    2012/12/27.22:01:42 0020: 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 ................
    2012/12/27.22:01:42 0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
    2012/12/27.22:01:42 0040: 00 00 00 00 00 00 00 00 00 00 00 00 ............
    2012/12/27.22:01:42 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:01:42 ***0 wst__info: code=0x0
    2012/12/27.22:01:42 ***0 wst__close: wh=0x0
    2012/12/27.22:01:42 (amh) qdv__automount_in_mh entered
    2012/12/27.22:01:42 (amh) qdv__automount_in_mh HPLTO4_2 at 2012/12/27.22:01:42, flags 0x100
    2012/12/27.22:01:42 (amh) mount volume options list contains:
    2012/12/27.22:01:42 (amh) vtype 3 (app), vid (null), vs_create 0, family cores2-default, retain (null), size 0, mediainfo 2, scratch 0
    2012/12/27.22:01:43 (amh) don't preserve previous mh automount state
    2012/12/27.22:01:44 (gep) getting reservation for element 0x3 (dte)
    2012/12/27.22:01:44 ***0 wst__set_mode: bus 7, target 500104, lun 0: HP,Ultrium 4-SCSI,H64S
    2012/12/27.22:01:44 ***0 wst__get_sn: code=0x0
    2012/12/27.22:01:44 ***0 wst__exec: op=0 (nop), buf=0x0, count=0 (0x0), parm=0x0
    2012/12/27.22:01:44 ioctl_op=0x7703, to=30, datalen=0x0, buf=0x0
    2012/12/27.22:01:44 cdb: 00 00 00 00 00 00 tur
    2012/12/27.22:01:44 ***0 wst__get_sense(int) cmd = 0, sense data:
    2012/12/27.22:01:44 70 00 02 00 00 00 00 10 00 00 00 00 3A 00 00 00
    2012/12/27.22:01:44 94 50 00 00 00 00 00 00
    2012/12/27.22:01:44 ec=0, sk=not ready, asc=3A, ascq=0
    2012/12/27.22:01:44 error is: device offline (OB scsi device driver)
    2012/12/27.22:01:44 flags: (none)
    2012/12/27.22:01:44 ***0 wst__exec: rval=-1, status.code/resid/checks=0x20008116/0x0/0x0
    2012/12/27.22:01:44 ***0 wst__close: wh=0x0
    2012/12/27.22:01:44 (amh) loaded volume has no barcode
    2012/12/27.22:01:44 (una) unload_anywhere entered
    2012/12/27.22:01:44 (amh) beginning pass 1, mediainfo pass 1
    2012/12/27.22:01:44 (gep) getting reservation for element 0x1 (se)
    2012/12/27.22:01:44 (mmr) family cores2-default != OSB-CATALOG-MF
    2012/12/27.22:01:44 (mmr) oid 5406 (vid OSB-CATALOG-MF-000057, tag 100003, create_time 1326110623, mediainfo 4) fails mount criteria
    2012/12/27.22:01:44 (amh) 1 oid 5406 doesn't meet mount requirements - volume doesn't meet mount criteria (OB device mgr)
    2012/12/27.22:01:44 (gep) getting reservation for element 0x2 (se)
    2012/12/27.22:01:44 (amh) 2 vacant
    2012/12/27.22:01:44 (gep) getting reservation for element 0x3 (se)
    2012/12/27.22:01:44 (mmr) oid 7150 (vid VOL001267, tag 100000, create_time 1356321775, mediainfo 4) passes criteria
    2012/12/27.22:01:44 (amh) 3 loading
    2012/12/27.22:02:30 (atv) qdv__automount_this_vol entered
    2012/12/27.22:02:30 ***0 wst__set_mode: bus 7, target 500104, lun 0: HP,Ultrium 4-SCSI,H64S
    2012/12/27.22:02:30 ***0 wst__get_sn: code=0x0
    2012/12/27.22:02:30 ***0 wst__exec: op=0 (nop), buf=0x0, count=0 (0x0), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7703, to=30, datalen=0x0, buf=0x0
    2012/12/27.22:02:30 cdb: 00 00 00 00 00 00 tur
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__dev_state...
    2012/12/27.22:02:30 ***0 wst__exec: op=0 (nop), buf=0x0, count=1 (0x1), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7703, to=30, datalen=0x0, buf=0x0
    2012/12/27.22:02:30 cdb: 00 00 00 00 00 00 tur
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__dev_state: no sense, status 0x0
    2012/12/27.22:02:30 ***0 wst__exec: op=2 (sense), buf=0x1002606d4, count=24 (0x18), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7705, to=30, datalen=0x18, buf=0x1002606d4
    2012/12/27.22:02:30 cdb: 03 00 00 00 18 00 sense, cnt=24
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__get_sense(int) cmd = 0, sense data:
    2012/12/27.22:02:30 70 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00
    2012/12/27.22:02:30 00 00 00 00 00 00 00 00
    2012/12/27.22:02:30 ec=0, sk=no sense, asc=0, ascq=0
    2012/12/27.22:02:30 flags: (none)
    2012/12/27.22:02:30 ***0 wst__exec: op=7 (readpos), buf=0xffffffff7fffdd60, count=20 (0x14), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7705, to=180, datalen=0x14, buf=0x1002607d8
    2012/12/27.22:02:30 cdb: 34 00 00 00 00 00 00 00 00 00 read_pos
    2012/12/27.22:02:30 raw position:
    2012/12/27.22:02:30 0000: F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
    2012/12/27.22:02:30 0010: 00 00 00 00 ....
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x10/0x0
    2012/12/27.22:02:30 ***0 wst__dev_state: state=0xd0000000 (online, at bot)
    2012/12/27.22:02:30 ***0 wst__info: infolen=0xd8, info=0xffffffff7fffe108
    2012/12/27.22:02:30 ***0 wst__dev_state...
    2012/12/27.22:02:30 ***0 wst__exec: op=0 (nop), buf=0x0, count=1 (0x1), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7703, to=30, datalen=0x0, buf=0x0
    2012/12/27.22:02:30 cdb: 00 00 00 00 00 00 tur
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__dev_state: no sense, status 0x0
    2012/12/27.22:02:30 ***0 wst__exec: op=2 (sense), buf=0x1002606d4, count=24 (0x18), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7705, to=30, datalen=0x18, buf=0x1002606d4
    2012/12/27.22:02:30 cdb: 03 00 00 00 18 00 sense, cnt=24
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__get_sense(int) cmd = 0, sense data:
    2012/12/27.22:02:30 70 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00
    2012/12/27.22:02:30 00 00 00 00 00 00 00 00
    2012/12/27.22:02:30 ec=0, sk=no sense, asc=0, ascq=0
    2012/12/27.22:02:30 flags: (none)
    2012/12/27.22:02:30 ***0 wst__exec: op=7 (readpos), buf=0xffffffff7fffdbb0, count=20 (0x14), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7705, to=180, datalen=0x14, buf=0x1002607d8
    2012/12/27.22:02:30 cdb: 34 00 00 00 00 00 00 00 00 00 read_pos
    2012/12/27.22:02:30 raw position:
    2012/12/27.22:02:30 0000: F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
    2012/12/27.22:02:30 0010: 00 00 00 00 ....
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x10/0x0
    2012/12/27.22:02:30 ***0 wst__dev_state: state=0xd0000000 (online, at bot)
    2012/12/27.22:02:30 ***0 wst__encryption_is_tape_encryptable...
    2012/12/27.22:02:30 ***0 wst__encryption_check...
    2012/12/27.22:02:30 ***0 wst__exec: op=17 (raw_op), buf=0x10025fca0, count=44 (0x2c), parm=0xffffffff7fffd5f8
    2012/12/27.22:02:30 ioctl_op=0x7705, to=30, datalen=0x2c, buf=0x10025fca0
    2012/12/27.22:02:30 cdb: A2 20 00 10 00 00 00 00 00 2C 00 00 security protocol in
    2012/12/27.22:02:30 i/p data:
    2012/12/27.22:02:30 0000: 00 10 00 28 09 00 00 00 00 00 00 00 00 00 00 00 ...(............
    2012/12/27.22:02:30 0010: 00 00 00 00 01 00 00 14 BA 14 00 20 00 0C 00 20 ........... ...
    2012/12/27.22:02:30 0020: 09 00 00 00 00 00 00 00 00 01 00 14 ............
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__encryption_check - have hardware encryption.
    2012/12/27.22:02:30 ***0 wst__encryption_is_tape_encryptable - yes
    2012/12/27.22:02:30 ***0 wst__exec: op=6 (modesen), buf=0x100260754, count=12 (0xc), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7705, to=30, datalen=0xc, buf=0x100260754
    2012/12/27.22:02:30 cdb: 1A 00 00 00 0C 00 mode_sen, cnt=12, pc=0, pcode=0
    2012/12/27.22:02:30 i/p data:
    2012/12/27.22:02:30 0000: 0B 00 10 08 46 00 00 00 00 00 00 00 ....F.......
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__exec: op=6 (modesen), buf=0x100260754, count=28 (0x1c), parm=0xf
    2012/12/27.22:02:30 ioctl_op=0x7705, to=30, datalen=0x1c, buf=0x100260754
    2012/12/27.22:02:30 cdb: 1A 00 0F 00 1C 00 mode_sen, cnt=28, pc=0, pcode=f
    2012/12/27.22:02:30 i/p data:
    2012/12/27.22:02:30 0000: 1B 00 10 08 46 00 00 00 00 00 00 00 0F 0E C0 80 ....F...........
    2012/12/27.22:02:30 0010: 00 00 00 01 00 00 00 01 00 00 00 00 ............
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__exec: op=18 (log_sense), buf=0x100260754, count=76 (0x4c), parm=0x71
    2012/12/27.22:02:30 ioctl_op=0x7705, to=180, datalen=0x4c, buf=0x100260754
    2012/12/27.22:02:30 cdb: 4D 00 71 00 00 00 00 00 4C 00 log_sense, cnt=76, pc=1, page_code=0x31
    2012/12/27.22:02:30 i/p data:
    2012/12/27.22:02:30 0000: 31 00 00 20 00 01 40 04 00 00 12 F6 00 02 60 04 1.. ..@.......`.
    2012/12/27.22:02:30 0010: 00 00 00 00 00 03 60 04 00 0C 35 E2 00 04 60 04 ......`...5...`.
    2012/12/27.22:02:30 0020: 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 ................
    2012/12/27.22:02:30 0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
    2012/12/27.22:02:30 0040: 00 00 00 00 00 00 00 00 00 00 00 00 ............
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__info: code=0x0
    2012/12/27.22:02:30 (atv) calling qdv__mount
    2012/12/27.22:02:30 (mt) qdv__read_mount_db() succeeded, found vol_oid 0
    2012/12/27.22:02:30 ***0 wst__exec: op=0 (nop), buf=0x0, count=0 (0x0), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7703, to=30, datalen=0x0, buf=0x0
    2012/12/27.22:02:30 cdb: 00 00 00 00 00 00 tur
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__dev_state...
    2012/12/27.22:02:30 ***0 wst__exec: op=0 (nop), buf=0x0, count=1 (0x1), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7703, to=30, datalen=0x0, buf=0x0
    2012/12/27.22:02:30 cdb: 00 00 00 00 00 00 tur
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__dev_state: no sense, status 0x0
    2012/12/27.22:02:30 ***0 wst__exec: op=2 (sense), buf=0x1002606d4, count=24 (0x18), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7705, to=30, datalen=0x18, buf=0x1002606d4
    2012/12/27.22:02:30 cdb: 03 00 00 00 18 00 sense, cnt=24
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__get_sense(int) cmd = 0, sense data:
    2012/12/27.22:02:30 70 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00
    2012/12/27.22:02:30 00 00 00 00 00 00 00 00
    2012/12/27.22:02:30 ec=0, sk=no sense, asc=0, ascq=0
    2012/12/27.22:02:30 flags: (none)
    2012/12/27.22:02:30 ***0 wst__exec: op=7 (readpos), buf=0xffffffff7fffc650, count=20 (0x14), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7705, to=180, datalen=0x14, buf=0x1002607d8
    2012/12/27.22:02:30 cdb: 34 00 00 00 00 00 00 00 00 00 read_pos
    2012/12/27.22:02:30 raw position:
    2012/12/27.22:02:30 0000: F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
    2012/12/27.22:02:30 0010: 00 00 00 00 ....
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x10/0x0
    2012/12/27.22:02:30 ***0 wst__dev_state: state=0xd0000000 (online, at bot)
    2012/12/27.22:02:30 ***0 wst__info: infolen=0xd8, info=0xffffffff7fffd930
    2012/12/27.22:02:30 ***0 wst__dev_state...
    2012/12/27.22:02:30 ***0 wst__exec: op=0 (nop), buf=0x0, count=1 (0x1), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7703, to=30, datalen=0x0, buf=0x0
    2012/12/27.22:02:30 cdb: 00 00 00 00 00 00 tur
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__dev_state: no sense, status 0x0
    2012/12/27.22:02:30 ***0 wst__exec: op=2 (sense), buf=0x1002606d4, count=24 (0x18), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7705, to=30, datalen=0x18, buf=0x1002606d4
    2012/12/27.22:02:30 cdb: 03 00 00 00 18 00 sense, cnt=24
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__get_sense(int) cmd = 0, sense data:
    2012/12/27.22:02:30 70 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00
    2012/12/27.22:02:30 00 00 00 00 00 00 00 00
    2012/12/27.22:02:30 ec=0, sk=no sense, asc=0, ascq=0
    2012/12/27.22:02:30 flags: (none)
    2012/12/27.22:02:30 ***0 wst__exec: op=7 (readpos), buf=0xffffffff7fffc4a0, count=20 (0x14), parm=0x0
    2012/12/27.22:02:30 ioctl_op=0x7705, to=180, datalen=0x14, buf=0x1002607d8
    2012/12/27.22:02:30 cdb: 34 00 00 00 00 00 00 00 00 00 read_pos
    2012/12/27.22:02:30 raw position:
    2012/12/27.22:02:30 0000: F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
    2012/12/27.22:02:30 0010: 00 00 00 00 ....
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x10/0x0
    2012/12/27.22:02:30 ***0 wst__dev_state: state=0xd0000000 (online, at bot)
    2012/12/27.22:02:30 ***0 wst__encryption_is_tape_encryptable...
    2012/12/27.22:02:30 ***0 wst__encryption_check...
    2012/12/27.22:02:30 ***0 wst__exec: op=17 (raw_op), buf=0x100254260, count=44 (0x2c), parm=0xffffffff7fffbee8
    2012/12/27.22:02:30 ioctl_op=0x7705, to=30, datalen=0x2c, buf=0x100254260
    2012/12/27.22:02:30 cdb: A2 20 00 10 00 00 00 00 00 2C 00 00 security protocol in
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    2012/12/27.22:02:30 0000: 00 10 00 28 09 00 00 00 00 00 00 00 00 00 00 00 ...(............
    2012/12/27.22:02:30 0010: 00 00 00 00 01 00 00 14 BA 14 00 20 00 0C 00 20 ........... ...
    2012/12/27.22:02:30 0020: 09 00 00 00 00 00 00 00 00 01 00 14 ............
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    2012/12/27.22:02:30 ***0 wst__encryption_is_tape_encryptable - yes
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    2012/12/27.22:02:30 ioctl_op=0x7705, to=30, datalen=0xc, buf=0x100260754
    2012/12/27.22:02:30 cdb: 1A 00 00 00 0C 00 mode_sen, cnt=12, pc=0, pcode=0
    2012/12/27.22:02:30 i/p data:
    2012/12/27.22:02:30 0000: 0B 00 10 08 46 00 00 00 00 00 00 00 ....F.......
    2012/12/27.22:02:30 ***0 wst__exec: rval=0, status.code/resid/checks=0x0/0x0/0x0
    2012/12/27.22:02:30 ***0 wst__exec: op=6 (modesen), buf=0x100260754, count=28 (0x1c), parm=0xf
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    2012/12/27.22:02:30 cdb: 1A 00 0F 00 1C 00 mode_sen, cnt=28, pc=0, pcode=f
    2012/12/27.22:02:30 i/p data:

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