Repeated SD card error - asks to format 256GB card

Thank you, and I appreciate the customer support from a fellow user :-)

My power connections are as follows

Red lead to battery positive; Black lead to battery negative, yellow lead to switched line(this is the only line the CAN bus controls). System does exactly what you are describing at power up, DVR boots up and comes on in about 10 seconds after I turn on the ignition..

On the power down, the switched line shuts off about ~60 seconds after the key is turned off(by design from BMW. If the voltage is below 12 then it will never turn on & it's controlled by the CAN bus).

I think the shutdown sequence you are describing matches expected behavior. I will put a meter on the yellow line and time it to see how long after the yellow line drops power before DVR lights and blue lights go off. The blue light also goes off around the same time of 90 seconds, so I suspect it is after the graceful shutdown.

Files seem to be ok since I changed to the 128 GB Samsung card yesterday. I will test for a few more days before saying it is resolved.

This is the sequence, turn on ignition, blue light comes on within a few seconds, camera, DVR everything works fine. Turn off ignition, blue light stays on for about 90 seconds and then turns off, same time when aux line is shut down by the BMW can bus. I do not know what a normal K2 shutdown is, but at 90 seconds all the lights on the DVR go off.

The first part sounds ok, but the second part makes me think you connected the power module the wrong way. You say that the blue led goes off after 90 secs. And that the DVR goes off after 90 secs, too. But the DVR shut go off around 10 secs after ignition is switched off.

The normal start and stop procedure of the K2 looks as follows:

1. When ignition is turned on, the yellow gets 12V. This tells the K2 the ignition is turned on.

2. 10 secs after this, the DVR starts booting up.
   

3. When ignition is turned off, the 12V on the yellow cable must be dropped, so the K2 knows this.

4. 10-15 secs after this, the DVR starts its gracefull shutdown, which includes stop recording, close the files, etc.

This all requires that the red cable of the power module is connected to a constant power source (e.g. the battery). If it is not connected to the battery, you have to make sure that the power on the red cables stays for at least for 20 sec after the voltage on the yellow cable has been dropped, giving the DVR time to shut down.

What you describe sounds like your canbus adapter cuts off power after 90 sec to the yellow and red line of the power module at the same time. So the DVR has no time to shut down gracefully, which results in the last files getting corrupted and, maybe, the filesystem on the sd card getting damaged.

It would be helpful if you could describe in detail how you connected the power module. If you use a canbus adapter, please describe what adapter you are using and how it is configured.

As for the blue light going off may be its a defective unit, can you send me a replacement unit to test?

I don't think it is defective. The blue led is only on when the red cable is connected to power. But as I described, it sounds you connected the red cable to the canbus adapter.

By the way...I am not an Innovv employee. Only a customer like you.

Ok the 256 GB card is completely unreadable. I have to format it.

Please do the test using h2testw, as written above. That's the only way to make sure the card is a) ok and b) really a 256GB card.

Any recommendation of a good 256 GB card? I prefer a 256 GB card to be my permanent solution. 

I mostly use SanDisk, though Sandisk recommend not to use their cards in dashcams. But Samsung is also a good choice.

Ok the 256 GB card is completely unreadable. I have to format it. I received a 128 GB Samsung Endurance Pro and have installed it, will test it for a few days and let you know. Any recommendation of a good 256 GB card? I prefer a 256 GB card to be my permanent solution.

As for the blue light going off may be its a defective unit, can you send me a replacement unit to test? The battery is less than 1 year old and the voltage I measured is >12v. I have tied the yellow wire to the aux line switched power. That aux line shuts off when battery voltage is below 12, so I know it works because the camera is on when ignition is on plus I can get power from the aux port without any issues.

This is the sequence, turn on ignition, blue light comes on within a few seconds, camera, DVR everything works fine. Turn off ignition, blue light stays on for about 90 seconds and then turns off, same time when aux line is shut down by the BMW can bus. I do not know what a normal K2 shutdown is, but at 90 seconds all the lights on the DVR go off. Any other way to test it? I have the gsensor set to mid, do you want me to set it high and try to shake the bike to trigger the parking mode wake up?? Any other testing you want me to do?

Question 1 & 2 - I have not tried removing the card to check on a PC if it is readable or corrupted. It is definitely unreadable when I try from the app. I will try that today.

Q3 - The yellow wire is connected to a switched aux power wire using a positap connection and this is not a power issue. I see that the system turns on fine and the blue light on the 12v - 5v converter comes on when I turn on the ignition and stays on till I turn it off.

Q4 - I am using a 256 GB Class 10 U3 - I bought an Alisinsen 256 GB from amazon. Now I have ordered a 128 GB Samsung Pro Endurance to try. Do you have a recommendation of a good known 256 GB card that works with the K2. I would like to use a 256 GB not 128.

Hi Anand,

what firmware version is installed on your K2?

Over the time there were some users in the forum reporting problems when using a 256GB card, but mainly with older firmwares (V0.5x / V.06x). Nevertheless, before returing the unit I would check out a different card with 128GB.