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Old 09-11-2013, 10:15 PM
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SD Card weirdness

This post is more informational than anything else. Perhaps my experiences will help someone else fix these problems permanently.

I have had numerous issues with my 8.4 system since I picked up my 2014WK2 in June. Much of my problem is around the SD card reader. All the following experience is while the system was running 13.15.4, and my card is a 32GB SANDisk which Uconnect has told me is fully compatible, and for the purposes of these tests, I have had only around 100 songs on the card.

I am currently using doubletwist for windows to transfer my desired MP3 to the card. Doubletwist does a GREAT job, allowing me to select tracks, artists, albums, or playlists and just drag it to the card which appears as a destination on the left menu. It it creates folders for the artists and albums and recreates the playlists as they are written to the card so that the playlists point to the right location on the card. Easy Peasy . (FYI, for itunes users, doubletwist gets it library from itunes, including the playlists, so this is a VERY easy way to move your itunes collection to the SD Card or USB stick)

When I insert the card into the truck, everything works GREAT ... for a while. Eventually, it just stops reading the card. Sometime it happens after a few days of success, sometimes after a few weeks. With no real explanation as to why . Usually when it fails, it is able to see there is a card, but is just not finding anything on it, and has a lot of lag trying to read it. Up until now I have simply resorted to reformatting the card and copying the music back on, which fixes it until it happens again. So I have been assuming either the card has a physical issue or the reader is defective or the uconnect system is writing something to the card to corrupt it.

I had come to the latter conclusion because on one occasion, the card started showing multiple copies of the same playlists, sometime 5 or more listings of the same playlists. And it seemed to accrue more copies on a daily basis. So I was assuming that the uconnect was writing something to the card. However, when I inserted the card into the computer, there was only 1 playlist file and it was still accurate as the day it was created.

Anyway, after the card failed yet again. I left it in for a couple of weeks, randomly ejecting & inserting to see if it came back to life (which it had done in the past sometimes). Today I was finally frustrated enough to take some time and upgrade the system software to 13.19.0 (Thanks Willx ). Interestingly, when I had completed the upgrade, I put the same card into the system which was NOT working earlier, and it worked just fine (welcome back Jason Aldean!). So in my opinion this proves there is nothing wrong with the card or the reader, because nothing has changed there during the upgrade process.

Which brings me back to the duplication issue as a clue. My current belief is that the Uconnect system builds some local cache within itself as to the content of the SDcard, which probably facilitates faster SDcard access after the initial insert. And I believe that this cache is where those duplicate playlists were residing, and furthermore I believe that this cache is what is getting corrupted when the cards ceases to work. So my guess is that my card is now working because the cache was wiped out during the upgrade process, allowing the cache to be rebuilt cleanly when I reinserted the card.

I do not know if the new version I installed today will solve the problem permanently, but based on today's experience I know what I am going to do if the card ceases again. My guess is that the uconnect system does a simple scan of the card upon startup to see if it was the same card that was inserted the last time the truck was running. And if that scan shows the same card, it probably just works off the currently cached information, rather than rebuilding. So if this happens again, instead of wiping the card, I am going to add a single song. To see if that forces the uconnect to view the card a "new" and build a new cache. Unless someone has any other thought on how to force the uconnect to re-read the card?

Of course all my jabbering relies heavily on the assumption of a cache within the system. Can anyone confirm or deny any of this??

Thanks in Advance, and I hope I haven't bored anyone to death
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Old 09-12-2013, 09:30 AM
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Re: SD Card weirdness

Interesting experience. It all makes sense except for the caching in the reader. Given how long it takes for other elements of the 8.4 system to boot or load, it seems that the relatively small time saving that would come with caching a playlist in a card reader wouldn't be worth the effort to include it in the design.

But, I could be wrong.
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Old 09-12-2013, 09:44 AM
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Re: SD Card weirdness

Born, do you lock the SD card after formatting and loading it? There has been some discussion of this. I do it, and I don't have problems. If the card was being corrupted in the reader, this would prevent it. I know you don't see anything when you check it on your computer, but stranger things have happened.
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Old 09-12-2013, 10:48 AM
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Re: SD Card weirdness

Quote:
Originally Posted by jacko15 View Post
Born, do you lock the SD card after formatting and loading it?
You mentioned this once before. I didn't remember if I locked mine or not. So, the next time I was in the Jeep I pulled the card, found the little 'switch', but there was no indication which way is lock.

And I keep forgetting to look at the cards in my camera case.

Maybe I should do that now.


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Old 09-12-2013, 11:11 AM
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Re: SD Card weirdness

Quote:
Originally Posted by jacko15 View Post
Born, do you lock the SD card after formatting and loading it? There has been some discussion of this. I do it, and I don't have problems. If the card was being corrupted in the reader, this would prevent it. I know you don't see anything when you check it on your computer, but stranger things have happened.
Yes, The card was locked. And it was locked when all those playlists were cropping up too. Which is yet another reason I believe there is a local cache in the uconnect system.

Another things is that when you are playing a song from an SD card when the vehicle is shut down, the song will resume back to that spot in the song when the vehicle is started again. With a locked card that information can only live within the uconnect radio, which bring us back to the cache in some form or another.
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Old 09-16-2013, 01:22 AM
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Re: SD Card weirdness

I've had similar issues.

Some songs (not all) getting listed multiple times, that coupled with SHUFFLE not sticking between sessions got quite annoying as after a shuffle session, next time I powered up shuffle is not selected and it plays all songs sequencially, and thus started playing the same damn song multiple times.

This weekend I finally cleared the exisitng multiple listings by doing a uconnect reset/reboot (Hold Mute & Tune/Enter Knobs for a few seconds)

However, I have already notice some coming back, in one particular folder.

When I get a chance I'm going to inspect that folder and clean up the ID3 tags and see if that helps ... if not I guess I just need to wait for the international uconnect update version
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Old 09-25-2013, 01:23 AM
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Re: SD Card weirdness

...I'm still having problems with multiple songs or it even not being recognized until card is reinserted.

I'm using a 32gb micro SD card in an adapter ... I'm wondering if this is the problem ... even though the adapters seem to work fine everywhere else.

I'm going for a long trip, so instead of messing around I dumped some of my music onto a 'real' USB stick so I'll evaluate the performance with that.

Then I intend to buy a stnadard size 32gb SD card and see how that behaves.

Is anyone reading this using a micro SD card with adapter in MY14 GC ?
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Old 10-06-2013, 07:23 PM
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Just reading the 'Tips Card' that came with my 14 GC. It says that there is a 16GB max. on the SD slot. Could this be why people are having issues with 32GB cards?

I am using an 8GB card without any issues.
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Old 10-06-2013, 07:46 PM
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Re: SD Card weirdness

I've been using a 32GB since day 1 (March) with no problem. I only have it about 25% full, so maybe that makes a difference.



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Old 10-06-2013, 08:32 PM
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Quote:
Originally Posted by stephen1973 View Post
Just reading the 'Tips Card' that came with my 14 GC. It says that there is a 16GB max. on the SD slot. Could this be why people are having issues with 32GB cards?

I am using an 8GB card without any issues.
I confirmed with uconnect hat 32Gb is fully supported
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Old 10-06-2013, 08:35 PM
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Quote:
Originally Posted by Born2golf View Post
I confirmed with uconnect hat 32Gb is fully supported
Cool, was contemplating buying a 32GB card. Think I'll pick one up and give it a try.
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Old 10-06-2013, 08:46 PM
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UPDATE: Hi all, just wanted to provide an update to this situation. As stated in my original post I did eventually upgrade to 13.19.0 and since then I have not experienced ANY of the issues I described earlier. The radio is is now reliable and I am comfortable knowing it is going to work each time I get in the vehicle, though still looking forward to new apps at some point.


Quote:
Originally Posted by Born2golf View Post
This post is more informational than anything else. Perhaps my experiences will help someone else fix these problems permanently.

I have had numerous issues with my 8.4 system since I picked up my 2014WK2 in June. Much of my problem is around the SD card reader. All the following experience is while the system was running 13.15.4, and my card is a 32GB SANDisk which Uconnect has told me is fully compatible, and for the purposes of these tests, I have had only around 100 songs on the card.

I am currently using doubletwist for windows to transfer my desired MP3 to the card. Doubletwist does a GREAT job, allowing me to select tracks, artists, albums, or playlists and just drag it to the card which appears as a destination on the left menu. It it creates folders for the artists and albums and recreates the playlists as they are written to the card so that the playlists point to the right location on the card. Easy Peasy . (FYI, for itunes users, doubletwist gets it library from itunes, including the playlists, so this is a VERY easy way to move your itunes collection to the SD Card or USB stick)

When I insert the card into the truck, everything works GREAT ... for a while. Eventually, it just stops reading the card. Sometime it happens after a few days of success, sometimes after a few weeks. With no real explanation as to why . Usually when it fails, it is able to see there is a card, but is just not finding anything on it, and has a lot of lag trying to read it. Up until now I have simply resorted to reformatting the card and copying the music back on, which fixes it until it happens again. So I have been assuming either the card has a physical issue or the reader is defective or the uconnect system is writing something to the card to corrupt it.

I had come to the latter conclusion because on one occasion, the card started showing multiple copies of the same playlists, sometime 5 or more listings of the sameplaylists. And it seemed to accrue more copies on a daily basis. So I was assuming that the uconnect was writing something to the card. However, when I inserted the card into the computer, there was only 1 playlist file and it was still accurate as the day it was created.

Anyway, after the card failed yet again. I left it in for a couple of weeks, randomly ejecting & inserting to see if it came back to life (which it had done in the past sometimes). Today I was finally frustrated enough to take some time and upgrade the system software to 13.19.0 (Thanks Willx ). Interestingly, when I had completed the upgrade, I put the same card into the system which was NOT working earlier, and it worked just fine (welcome back Jason Aldean!). So in my opinion this proves there is nothing wrong with the card or the reader, because nothing has changed there during the upgrade process.

Which brings me back to the duplication issue as a clue. My current belief is that the Uconnect system builds some local cache within itself as to the content of the SDcard, which probably facilitates faster SDcard access after the initial insert. And I believe that this cache is where those duplicate playlists were residing, and furthermore I believe that this cache is what is getting corrupted when the cards ceases to work. So my guess is that my card is now working because the cache was wiped out during the upgrade process, allowing the cache to be rebuilt cleanly when I reinserted the card.

I do not know if the new version I installed today will solve the problem permanently, but based on today's experience I know what I am going to do if the card ceases again. My guess is that the uconnect system does a simple scan of the card upon startup to see if it was the same card that was inserted the last time the truck was running. And if that scan shows the same card, it probably just works off the currently cached information, rather than rebuilding. So if this happens again, instead of wiping the card, I am going to add a single song. To see if that forces the uconnect to view the card a "new" and build a new cache. Unless someone has any other thought on how to force the uconnect to re-read the card?

Of course all my jabbering relies heavily on the assumption of a cache within the system. Can anyone confirm or deny any of this??

Thanks in Advance, and I hope I haven't bored anyone to death
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