Problems with my X2

Unfortunately not - the problem with flash memory is that it has so many uses and then it goes bad. The card is split into lots of tiny pages and if one of these is written to too many times then it become bad.

What it looks like is happening is that too many pages are dying and so the card detects this and flicks into read only mode so that say if it's a camera with your holiday photos on so that they're still accessible.

The biggest issue with microSD cards is that they're tiny, so it's difficult to fit in extra memory and fancier controllers to cope with this - basically some of the more expensive cards (i.e. Sandisk Extreme) have wear levelling and error correction to help cope with this.

What would happen there is that the camera thinks it's writing to one section but the card itself redirects it to a less used area to try and balance it out (i.e. wear levelling). The card itself keeps a map of what is actually where and how many times it's been used.

The Sandisk Ultra don't have this capability and it's why you hear of those going bad in dashcams too - there was a time when loads of those were dying but that died off quite a while ago. Again a bad batch caused lots of noise everywhere.

It could just purely be that Transcend have had some memory chips with a lower yield used in some microSD cards and that is why they're all barfing so quickly. Alternatively maybe a software update to the controller which has a bug.

The thing is the cameras with microSD cards don't expect to see them go into read only mode as unlike full size SD cards they don't have the little toggle switch at the side, and when the card does die it causes carnage because the camera is sitting waiting for writes to complete, fills up it's internal memory and then chokes until it can flush the data to card. Because it can't write the data, it ends up looking like it's locked up.

If you had specialist hardware then you may be able to hook up to the controller in the card and maybe do something in there, but to be honest with the time and effort involved in that you could buy loads of brand new cards, all with their own warranty :)
Maybe using a MLC type memory cards would be more practical ?
 
Definitely - it sounds like those Lexar cards you have are MLC so they should last longer - these black Samsung Pro cards we have I think are still TLC memory - the new ones are MLC though.

I'm not sure if the camera would need tweaking to work better with them but the Korean reseller of the X2 does recommend primarily MLC based cards :)

SLC cards are the most robust but they're smaller sizes and more expensive :)
 
Hi Niko and reverend. I have just downloaded the SmartDisk tool and went about formatting and it seemed to do it very quickly with a message saying that it had been formatted but, when I went into the card, all of the recorded files were still showing. I thought that formatting got rid of everything.
 
It does - your card has toggled into protection mode and needs replacing - have my memory responded yet?
 
It does - your card has toggled into protection mode and needs replacing - have my memory responded yet?
No they have not got back to me yet
 
Definitely - it sounds like those Lexar cards you have are MLC so they should last longer - these black Samsung Pro cards we have I think are still TLC memory - the new ones are MLC though.

I'm not sure if the camera would need tweaking to work better with them but the Korean reseller of the X2 does recommend primarily MLC based cards :)

SLC cards are the most robust but they're smaller sizes and more expensive :)
Yeah. On korean blackbox ( dashcam ) forums they have a lot of discussions about MLC type memory cards, their stability and performance. MLC is higher in price but it looks like we might need to start testing X2 with MLC and collecting a data on their performance when used along with X2.
 
Have you got any links to good ones please @niko, I always like reading new info from different places :)
 
Have you got any links to good ones please @niko, I always like reading new info from different places :)
I have them in "favourites" on my PC. My brain is getting older [emoji4], so you have to remind me via PM later on tonight, then I will share w U.
 
Right I've ordered 2x Lexar MLC 64GB cards which should be here tomorrow - fingers crossed :)

Oh actually I'm researching - not sure whether to try the new Samsung Pro cards with MLC as well!
 
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When ordering cards, can you actually see that they are the MLC type. I have looked again at my order with My Memory and I can find no mention of MLC or otherwise in the description.
 
Its sad that not always manufacturer adds word "MLC" to the product. Transcend has series of MLC type memory cards which they dont label with MLC, but if to look into specs sheet, only then can find is it SLC or MLC.

The Ultimate series is MLC, but unfortunately they dont do 64Gb

Transcend Memory Cards (1).jpg


Transcend Memory Cards (2).jpg



I have 16Gb Transcend MLC and its actually written there its MLC, but its only 16Gb.
So its kinda strange that in catalogue they do have MLC cards, but with no MLC labelling, but the one I have has MLC.

2015-03-04 17.59.44.jpg
 
NMicro is something new to me.

Its Class U3 and advertised as MLC type. 64Gb MicroSDXC 27.91£. Quite high rating feedback ( 77 votes / 4.5 start )

Description says.
100% Made in Taiwan MLC Chip ship from NMicro Technology directly 85~90MB/s Read for support U3 UHS-II microSDXC devices 40~60MB/s Write for support U3 UHS-II microSDXC devices MLC Nand Flash support CPRM 100% Made in Taiwan directly ship from NMicro Technology

NMicro 64Gb MLC.jpg
 
I was looking at those on Amazon earlier actually - they ship from Taiwan from what the Amazon reviews say.

I've not ordered yet - all the cards I see that are rapidly fast are all TLC - I'm tempted by the Lexar purely to get the free USB3 readers as they always come in handy!

There are some MLC cards in this list too:

Barun Electronic’s Gold Flash PRO (64GB) MLC
Memorette (memento) Standard premium (8GB) MLC
Lexar High-Performance UHS-I cards [300x] (64GB) TLC MLC [LSDMI64GBBNL300A]
Lexar High-Performance UHS-I 633x MicroSD (64GB) MLC [LSDMI64GBBNL633R]
Samsung PRO [New 2014 Series] (64GB) MLC [MB-MG64DA]
Sony High-Speed R95 UHS-3 (64GB) MLC [SR64UXA]
PNY Turbo Performance High Speed MicroSD (64GB) MLC [P-SDUX64U190-GE]

I think the new Sandisk High Endurance cards will be MLC too but we will see :)

I never realised until today but Blackvue do cards which are MLC too
 
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Still nothing from My Memory re my complaint. Just wondering if I ought to buy something else. If I do that, you can bet your life they will simply replace rather than give a refund.
 
I've ordered two of these:
Lexar High-Performance UHS-I 633x MicroSD (64GB) MLC [LSDMI64GBBNL633R]

I'll let you know how I get on - they're due tomorrow and I'll be putting them straight into the car :)
 
I've ordered two of these:
Lexar High-Performance UHS-I 633x MicroSD (64GB) MLC [LSDMI64GBBNL633R]

I'll let you know how I get on - they're due tomorrow and I'll be putting them straight into the car :)

Yes it will be interesting to see how you get on with them In an earlier post you suggested that you might try to replicate the problem. Did you have a go at it?
 
I didn't yet actually - just doing an audit at the moment so didn't get chance yesterday and my car is sat down at the garage so it's looking like tomorrow now :)
 
Oh dear, there seems to be an increasing number of problems being reported. Just wondering if we are likely to overcome them and be able to 'switch on and not worry' any time soon or, if it is going to be an ongoing problem.

Are the smaller sized memory (gb wise) cards likely to be less of a problem than the 32's or 64's, if they are, my thoughts are, that as the recordings constantly go round in a loop, are large cards really necessary?

My knowledge of all things electronic is virtually non-existent and so I am happy to be guided by you more experienced members.
 
Oh dear, there seems to be an increasing number of problems being reported..

there's an increasing number of users so seeing more reports is going to happen

Just wondering if we are likely to overcome them and be able to 'switch on and not worry' any time soon or, if it is going to be an ongoing problem.
.
it's being worked on as a priority, it has been an issue as the problem hasn't been able to be replicated in a lab environment, an update is being prepared that will log what's happening so data can be collected in the field, will accelerate the troubleshooting process
 
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