MLC MicroSD Cards

Didn't see anyone mention Transcend High Endurance. Currently testing in with 0903.
Pp_USDXC10V_64GB_pkg.jpg
 
This is WIP.

MicroSD UHS-I cards.

Transcend (info from the web site):
Kingston (info from Technical Support-USA):
Samsung (info from the NET-unofficial)
Lexar (info from Technical Support-Europe):

SanDisk

Toshiba

Sony


Delkin
 
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Well it's looking like one of the Lexar 633x 64GB cards I've had running 24x7 for 26 months now has finally given up the ghost in the spell of hot weather we've had in the UK.

Initially the card couldn't be seen at all in any OS so I left it in a Kingston USB reader for a couple of days and it started behaving a bit better to the point I could see it and format it but it won't complete a full overwrite erase within SDFormatter and will just bomb out - you can see currently it's just hung SDFormatter without throwing an error yet.

upload_2017-5-30_13-46-54.png

Most definitely dead Jim. 26 months in a cam with a very sensitive parking mode so the card was written to a lot isn't a bad innings - I've RMA'd the card and they're shipping a new one out as soon as they receive the old one.

I'll be intrigued to see how the benchmarks compare to see how the new card compares to an older one that is still working (for now) :)

It's interesting seeing one die first hand as you hear of some cards which die and the controller toggles into read only to give you access to your data whereas this is behaving so randomly.
 
Well wouldn't you just know it - got back from holiday and the second Lexar card died exactly the same death and isn't recoverable!

I'm guessing it was to do with the hot spell we had a few weeks ago and it just destroyed the cards while they were sat running parking mode in the Panorama X2. It's quite amusing they died together in the first hot spell we've had in a long time.

I today received the replacement (something went tits up with the RMA process) and it certainly doesn't seem to perform like the original card did.

I did notice the cards that were sent back were both listed as UHS-3 and the replacement is UHS-1. I'll see what they RMA the other with.

Here are the fresh out of the box exFAT stats from CrystalDiskMark:

upload_2017-7-6_12-43-23.png

Code:
-----------------------------------------------------------------------
CrystalDiskMark 5.2.1 x64 (C) 2007-2017 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

   Sequential Read (Q= 32,T= 1) :    44.269 MB/s
  Sequential Write (Q= 32,T= 1) :    26.661 MB/s
  Random Read 4KiB (Q= 32,T= 1) :     7.075 MB/s [  1727.3 IOPS]
 Random Write 4KiB (Q= 32,T= 1) :     1.411 MB/s [   344.5 IOPS]
         Sequential Read (T= 1) :    43.410 MB/s
        Sequential Write (T= 1) :    26.006 MB/s
   Random Read 4KiB (Q= 1,T= 1) :     6.122 MB/s [  1494.6 IOPS]
  Random Write 4KiB (Q= 1,T= 1) :     1.377 MB/s [   336.2 IOPS]

  Test : 1024 MiB [H: 0.0% (0.0/59.7 GiB)] (x5)  [Interval=5 sec]
  Date : 2017/07/06 12:43:42
    OS : Windows 10 Enterprise [10.0 Build 15063] (x64)

I've formatted the card with SDFormatter 4.0 with the default options and it now shows:

upload_2017-7-6_12-55-29.png
Code:
-----------------------------------------------------------------------
CrystalDiskMark 5.2.1 x64 (C) 2007-2017 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

   Sequential Read (Q= 32,T= 1) :    88.900 MB/s
  Sequential Write (Q= 32,T= 1) :    30.825 MB/s
  Random Read 4KiB (Q= 32,T= 1) :     7.292 MB/s [  1780.3 IOPS]
 Random Write 4KiB (Q= 32,T= 1) :     1.398 MB/s [   341.3 IOPS]
         Sequential Read (T= 1) :    85.993 MB/s
        Sequential Write (T= 1) :    29.150 MB/s
   Random Read 4KiB (Q= 1,T= 1) :     6.512 MB/s [  1589.8 IOPS]
  Random Write 4KiB (Q= 1,T= 1) :     1.355 MB/s [   330.8 IOPS]

  Test : 1024 MiB [H: 0.0% (0.0/59.7 GiB)] (x5)  [Interval=5 sec]
  Date : 2017/07/06 12:55:34
    OS : Windows 10 Enterprise [10.0 Build 15063] (x64)
 
Reverend, thanks.

Is your replacement card a Lexar 633x 64GB, or did they upgrade you to a different model?

Did you format the new microSD as FAT32, or another type?

What are the given specs for that card?

I thought that dash cams say the best way to format is to use the dash cam itself, not computer apps?

Thanks
 
The replacement was still a Lexar 64GB 633x but just labelled U1 unlike the U3 of the old one.

Due to the size of the card the default format is exFAT.

In the camera it is to be used in, a Zoran / CSR based Panorama X2 it's best to use the card as FAT32 to work around issues with their exFAT driver so you have to format in the PC. It all depends on the camera.
 
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