Rabbit
Administrator
Posts: 7,087
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Post by Rabbit on Sept 29, 2016 9:13:44 GMT
X5 does the same so it must process at the same speed as the x3. That's a surprise too.
I must admit, I do have a soft spot for the x3 MK1. It's nice not to have the wheel which is basically pretty clumsy IMO.
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garyc
contributing
Posts: 45
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Post by garyc on Oct 5, 2016 22:46:31 GMT
Samsung used to have a small program for doing what you're looking for Ian but I can't find it now. I did find this though.. linkAlso been away from the forum for a while and this same utility from Ridgecrop I actually came across and used a couple of days ago to format a 64GB Samsung Evo card which had exFAT by default, so I can recommend it. This was to use the card in a new dashcam that I bought that required FAT32. I had decided when I bought my X3ii that 64GB cards were the sweet spot for price/GB. I must admit to having used them as-is and gave no thought to the file system they were formatted with (else I am sure to have come across the 32GB FAT32 Windows limit before). The higher bit density of flash used in these 128GB SD cards is coming at the expense of worsening error performance. It wouldn't surprise me at all that being so cheap (compared to say a 2.5" SSD ) that the controllers in them are more basic and use cheaper techniques like read retry (in the face of too many errors for their hardware error correctors) which will massively impact read performance if and when too many errors in a flash page occur.
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garyc
contributing
Posts: 45
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Post by garyc on Oct 5, 2016 23:03:35 GMT
I remember reading somewhere (possibly on Fiio's forum) that their players can have problems with certain Samsung branded cards. I would think that is possibly because of incompatibilities with the memory card's controller, much in the same way that OTG was so problematic (again this is just speculation on my part). Those mSD adapters are horrible. All the ones I've had have been sooo inconsistent in their speed. Start a transfer - extremely slow. Cancel, reinsert the card, start transfer again - much faster. I've given up using them and just stick with the good old USB adapter (the card reader in my new laptop isn't very good either). Speaking about USB adapters, does anybody know if it's worthwhile getting an USB 3 model? I have a 2.0 right now, but not sure if the cards can write fast enough to justify getting a 3.0 replacement (my external HD is wonderfully faster on a proper USB3) I've also found that the built in SD card readers in PCs are inconsistent, the one in my old Dell laptop has got to the point where it may or may not even recognise the card at all. The Dell doesn't have USB 3 but have a more recent Toshiba laptop that does, so have taken to using a cheap uSD plus SD USB 3 adapter that I keep in my camera bag for transferring photos for both the Dell and Toshiba. Just to add also the the uSD to SD adapters are just pin to pin form factor adapters, so any inconsistencies are likely just down to bad contacts, but coming to think of it, that may actually be my problem with the Dell when I use an adapter to read a uSD in its SD card slot. This is is the kind of USB 3 adapter I have www.amazon.co.uk/Memwah-USB-Multi-Card-Reader/dp/B00FCCBPIW/ref=sr_1_6?ie=UTF8&qid=1475708952&sr=8-6&keywords=Micro+SD+USB+3
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garyc
contributing
Posts: 45
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Post by garyc on Oct 5, 2016 23:29:55 GMT
Although the quite old now, this post does provide some insight into the innards of an SD card www.bunniestudios.com/blog/?p=3554Now the latest Samsung and Sandisk cards will likely feature their own controllers to handle the latest generation of their TLC Flash. But you have to bear in mind that the expected workload of an SD card is very different from an SSD, and the levels of performance differs greatly (mainly due to an SSD running many flash channels in parallel and having a large DRAM cache). The controller in an SD card will be a much simpler affair and probably not have all the bells and whistles like soft decision LDPC decoding for instance, nor have that DRAM cache for doing things like read ahead caching. For that reason their performance is not going to be any where near as consistent as a full blown SSD controller.
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Rabbit
Administrator
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Post by Rabbit on Oct 6, 2016 7:36:51 GMT
Thanks Gary. I'll try one of those usb3 devices. Mine is usb2 so probably slow. Backing up my cards is a slow process. I have 2 X 128gb, 8 X 64gb, and 4 X 32gb cards and my problem with the 128gb cards has made me very wary of them.
I was very surprised how easily they can snap as well. I destroyed one card since it was corrupted and it broke like a biscuit. Very easily.
There are also shysters selling say, 64gb cards which either don't work or don't have the claimed memory.
Anyway, backups are a must!!!
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