SD cards size, speed, etc. - MDA III, XDA III, PDA2k, 9090 General

I want a SD card for my PDA2k. Can't anyone finally answer the question of the largest card size that is supported by this device? Also what are the read write speed for a standard SanDisk card compared to the 10/9 MB/s speeds of the Ultra II cards? Also can our devices actually support the faster read/write or is it unnecessary overkill? Anyone have any direct speed comparisons for any tasks comparing std. vs. Ultra II?

Found some results, still looking for advice
I finally found some test results for read/write speed for Sandisk regular SD cards. 6/4 MB/s see here: http://www.tcmagazine.info/articles.php?action=show&id=4&perpage=1&pagenum=2 . So with the Sandisk Extreme at 10/9 and the Extreme III at 20/20 there is a large difference. Now again the questions are: Can our devices support the new 2GB cards and in real world applications, such as file storage, mp3 and wmv storage and playback and GPS map useage, are these higher speeds really noticeable?

Hi
I have a kingmax platinum 1G card (60x) and a bog standard sandisk 1G card. Dont notice any difference on my XDA IIs.
On a PC in a USBII reader, the kingmax is about 10% quicker on writes with no difference on reads.
The claims made by manufacturers about the speeds of their devices are mostly [email protected] Additionally, the XDA IIs is much, much slower at reading/writing from the cards than the PC is.
Nigel

Related

What is the data transfer speed for the P3600i using MiniSD or MiniSDHC cards?

I am curious to know if there is any real benefit to using the SDHC cards which represent larger capacities and faster data transfer speeds.
As i am likely to simply use a 2Gb card, i have the choice of SD or SDHC. But if i know what the actual speed capacity that they handset can handle then that would be very useful.
Presently my 1gb MiniSD card and store TomTom6 on it along with the maps and POI's but i have found that if i load too many POI options then TT6 hangs. So i think this has something to do with the transfer rates. (i could be wrong, but thats my suspicion)
All comments appreciated.
As its unlikely that anyone would have both a regular SD and SDHC cards, could you please just list the read and write transfer rates with the card you have. (please indicate which brand and model of the card)
Thanks
GLO said:
I am curious to know if there is any real benefit to using the SDHC cards which represent larger capacities and faster data transfer speeds.
Click to expand...
Click to collapse
Hello GLO,
the benefit of SDHC is capacity and a standardized write-speed-rating for the cards. The speed is not necessarily higher, as there were a lot of fast SD-cards in all flavours before.
Coming from SD and CF for my DSLR, there has been a phenomenon: While the better SD-cards were really fast, most manufacturers have not built their newer SDHC-cards as fast as their best SD-cards, but just maintained the minimum level for the various speed-ratings defined by the SD-association.
The data for my 2GB Sandisk Standard (no Ultra or Extreme) card according to SK-Tools:
FAT16, 32KB-Cluster:
average write speed: 410,34KB/s
average read speed: 613,48KB/s
From what I have seen on my trusty Dell, the devices do not show much of a difference between standard and fast cards, thus I have just gone for a standard card in my Trinity.
TG.
Hi TG,
Thanks for that. Some very good points you raised!
What card are you using?

[Q] microSDHC speeds - Advice

Hi,
I've been following the discussion on faster IO here by mounting extra stuff back on the SD card. I believe that to take advantage of this a faster microSDHC card can only help.
My card is a SanDisc 16GB Class 2 job, I just transferred it from my old N97 mini.
Looking around I noticed that generally the fastest is a class 6 although Kingston now seem to produce a class 10.
Of course Class increase == $$ increase.
I noticed that one site mentioned low speeds with a class 6 when using a benchmark tool, SD Card Speed Tester from the market.
Of course I just had to download it and see what my lowly class 2 card would do.
B***dy H*ll it exceeded class 6 cards and achieved:
Write Speed is 9MB/s
Read Speed is 15MB/s
Screen shot attached.
So my question is, how likely is it that it really is a fast card or just that the BM tool got it wrong ?
the "class" mentioned is actually the minimum r/w speed rated for the card, and branded cards often have speeds exceeding the rated class easily, so yeah, it is a fast card, no doubt
Thanks,
This was a "bounce my thoughts" type of question. You've confirmed my thoughts.
Just as a sanity check I later tried my other class 2 card, a 4GB job that came with the phone. It was 3-4MB/s write. That improved my confidence that the SD speed app was producing reasonable results.

Difference between Sandisk Ultra microsd card and normal card?

I'm going to buy a 16GB microsd card from sandisk. I've been finding on Amazon and found these two products:
Sandisk 16GB Mobile Ultra MicroSD Card : £36.00
SanDisk 16GB microSDHC Memory Card : £15.99
I've also noticed they're all class 2 (can't find a class 4 or class 6 sandisk). So what is the difference between them? I'm using the card for Windows Phone 7, so which one should I buy?
Ha, i'm looking to buy a 16Gb card for my htc desire and I was looking at exactly the same cards.
As far as I found so far the ultra version seems to be class 4.
If you have any new info it will me much appreciated.
well in some pages you can find comparative boxes about those micro sd, i remember that microsd 16 gb sandisk (class4) is more faster than 16 gb kingtons class4 , so i supousse that this ultra micro sd is like class 6 real XD, i will find some information about it, oh plz don't forget that some devices don't support those kind of micro sd (an example htc hd2 has little bugs with microsd class 4, i have one...)
Sorry if i don't write well but i'm peruavian =)
Hey guys,
Can any of you confirm if Android is booting from Sandisk 16GB Mobile Ultra MicroSD Card ?
I want to buy one but i saw in forums that some cards doesn't work for this..
the ultra one has the better speed and more stable than the normal one. And, it has the same compatitablity.
So, if you are not concern about the price, the ultra one is the better choice.
Also, that should have the extreme III type, that is the best~
Go for the Ultra microSD, it's faster!! been using a 8Gig on my phone and damn its fast!!
16GB Sandisk Micro SDHC
I'm currently using 16GB Sandisk Micro SDHC (class 4) for my LG P500. It is fast & I have not encountered any issues so far.
I've been using Sandisk memory cards for other gadgets & I think it is one of the most reliable brands that is available in my location.
With sandisk/kingston, class 2 should be fine too. CLASS 4 might help recording high def video
Stick with the name brands and forget the Chinese non name brand off off of Flea-bay, they are crap and do not work imho!!
The more expensive cards are usually just higher speed.
I use fast cards in my DSLR to help when shooting bursts. Slower cards fill up, and drop the fps.
I'm currently using 16GB Sandisk Micro SDHC
Go for the Ultra microSD, it's faster!!
You should choose your memory card depending on what you're going to use it for. Either way, you should go with Sandisk cards, as they are the highest quality and produce their own chips. Kingstons should be avoided even though for some reason they are known as a quality brand... kingston just buys chips from other manufacturers and puts their name on them.... you will find many different kinds of chips inside kingston, so you will find more variation and defects from batch to batch.
As far as class, that is only referring to the sequential write speed. If you are getting the card for a digital camera, then a high class card is good, because you will be writing a lot of files sequentially.
But if you plan on using the card for WP7 or to run android of off, generally a class 2 or 4 card is better, because they have better random access speeds. The tweaks card makers do to make cards have higher sequential write speeds many times will lower the random access speed, so you will have more issues running WP7 or Android off of a class 6 or 10 card.
for 8gb ultra i got with usb2.0 card reader : 13mb/s write , 20.5mb/s read
I know the thread is old, but still.
zarathustrax said:
You should choose your memory card depending on what you're going to use it for. Either way, you should go with Sandisk cards, as they are the highest quality and produce their own chips. Kingstons should be avoided even though for some reason they are known as a quality brand... kingston just buys chips from other manufacturers and puts their name on them.... you will find many different kinds of chips inside kingston, so you will find more variation and defects from batch to batch.
As far as class, that is only referring to the sequential write speed. If you are getting the card for a digital camera, then a high class card is good, because you will be writing a lot of files sequentially.
But if you plan on using the card for WP7 or to run android of off, generally a class 2 or 4 card is better, because they have better random access speeds. The tweaks card makers do to make cards have higher sequential write speeds many times will lower the random access speed, so you will have more issues running WP7 or Android off of a class 6 or 10 card.
Click to expand...
Click to collapse
I know thread is too old to write anything. But still (since google pointed me here)...
I've used both types of cards and have found that Sandisc ultra (Red & Black) is far better in speeds and reliability than the Sandisc simple/normal black colour chips. Also know that there are further/more better than ultra, called by Sandisc as extreme and Extreme Pro.
Also warranty for all is same: Lifetime. And Sandisc provided me a new chip within 25 days after my old 32 normal chip went faulty.
Re
I would always buy a class 10 card, because when you copy your photos it doesn't take so much time...
I discovered - the hard way - that "normal" class 2 or 4 MicroSD cards won't stay alive very long on Samsung Note 4 or similar phones... One day they stop working and all pictures and info is lost forever. The only MicroSD that can get the job done is a Class 10 UHC Sandisk card. I have used Kingston and all died only after a few months, specially if you install apps on them. They can´t handle the workload and you will end up losing everything you have on them. I have one of the red and gray Sandisk cards and it's awesome. It's fast and it's still working after 2 and a half years of use in a Sony Xperia Z2. Gotta love this little tough card.

[Q] microSD vs microSDHC, speed differences?

When using FRX7.1 what kind of speed increase can I expect when upgrading to an SDHC card?
benutne said:
When using FRX7.1 what kind of speed increase can I expect when upgrading to an SDHC card?
Click to expand...
Click to collapse
None.
SD vs. SDHC is mostly about capacity. The speed boost from using a C10 or C6 card isn't realized unless you're using it in a cam shooting high-def video - where data transfer speed is required.
I guess you might see a *slight* boost, but I seriously doubt it.
Find a card that has the fastest random-read/write performance for small file sizes (8kb-256kb). Use a program like CrystalDiskMark or ATTO32 Benchmark to test it. It doesn't matter if its 2gb or 32gb, C4/C6 or C10 (in fact, most C10 cards have worse random-read/write performance than some C4/C6 cards).
C2/4/6/10 all refer to a minimum requirement for sequential-writes (2mb/4mb/6mb/10mbps). For a digital camera recording 1080p video, sequential-write performance is important. But as far as running a hacked-up OS, where we're going to be reading/writing small 32kb files anywhere in the card, you're going to want something "fast" in that sense (My Sandisk 8gb C4 performs best, then my A-Data 16gb C6)

SDcards.

Hey guys. So whats the best SD for the 10? Looks like the SanDisk Extreme PRO SD UHS-II is the fastest card available at the moment. Anyone using it and is there a noticable difference in phone storage speed vs the sdcard speed?
This is the one I was looking at. http://www.bhphotovideo.com/c/produ...qxpj_128g_ancm3_128gb_extreme_pro_uhs_ii.html
OR maybe the 64gb version
http://www.bhphotovideo.com/c/produ...sqxpj_064g_ancm3_64gb_extreme_pro_uhs_ii.html
I'm using the SanDisk Extreme Pro 32gb. Honestly, I can't tell much difference between it and my Samsung EVO+ Card
I'm using the 200gb Sandisk Extreme Pro. It's not the fastest, but I actually just cared more about capacity. Have it setup as my adoptable storage at the moment.
FYI, Amazon is selling Sony 128GB Class 10 UHS-1 MicroSD cards for ~$33. Link. 64GB is ~$23.
The fastest one you can get, that the 10 can actually take advantage of is the Sandisk Extreme Pro 64gb UHS1 - U3.
http://www.amazon.com/SanDisk-Extre...894646&sr=8-2&keywords=sandisk+extreme+pro+u3
The snapdragon 820 does not support UHS2 cards, so that would just be wasted money.
I'm using this one and the overall reviews are mixed but I get write speeds of 77 Mbps and reads at 89 Mbps but its relatively cheap for a 64 gig U3 card
http://www.amazon.com/PNY-Elite-Mic...346&sr=8-2&keywords=pny+elite#customerReviews
Larger capacity cards will be slower. 64GB may be best bang for buck if you are looking for performance. I preferred capacity as well as speed, and hence got:
http://www.amazon.com/Lexar-Professional-microSDXC-UHS-II-LSDMI128CBNL1000R/dp/B00U77V5KU
I have been happy with its performance.
regalpimpin said:
The fastest one you can get, that the 10 can actually take advantage of is the Sandisk Extreme Pro 64gb UHS1 - U3.
http://www.amazon.com/SanDisk-Extre...894646&sr=8-2&keywords=sandisk+extreme+pro+u3
The snapdragon 820 does not support UHS2 cards, so that would just be wasted money.
Click to expand...
Click to collapse
Oh that's great info! I didn't know that the 10 didn't support the UHS2 cards.
Sent from my HTC 10 using XDA-Developers mobile app
There will be a 265GB micro sd card from Samsung - Samsung EVO Plus 256GB .
I don't buy anything from Samsung as I have had horrible luck with their products. Had a 64GB a year ago that went bad. Personal experience/preference...
I am using the Sandisk 200GB, if you watch Amazon they run sales on them. I got mine in mid-march for $59.99.
128gb sandisk extreme on sale now at amazon... https://www.amazon.co.uk/dp/B01DYN4VPE/ref=cm_sw_r_other_apa_itlnxb0VTPKS3
Sent from my HTC 10 using XDA-Developers mobile app
I went with this one 95mb read, 90mb writing 128gb http://www.amazon.com/Samsung-Micro...&redirect=true&ref_=oh_aui_detailpage_o01_s00
Fastest MicroSD :-
https://www.amazon.com/dp/B010NE3N3S/ref=psdc_3015433011_t2_B00NUB3530
Source:-
https://havecamerawilltravel.com/photographer/fastest-microsd-cards
I got this one https://www.amazon.com/gp/product/B01DYN4VPE/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1 which is $66 right now. I read that what is considered fastest is sustained fast write where if you are using the card as Adoptable Storage you may want fast 4Kb random writes which is not the same.
So, even where Extreme Pro exist I went for the Extreme in hopes the HTC 10 doesn't complain when adopting...and it didn't
Now I just have to keep searching for a plastic belt holster for a naked HTC 10..
4KB random reads are the most important for adoptable storage as you will be loading application data from the SD card.
4KB random write is also important but not as much as the read speed is.
To be fair though, random write speed is always much lower than random read speed, so focusing on as high random write speed as possible isn't a bad idea since if the random write speed is high, the random read speed will be high as well.
For reference the HTC 10 does about 10MB/s in both read and write for 4KB random.
As an example the 64GB size of Sandisk Extreme U3 has been benchmarked to be capable of 5.5MB/s and 0.5MB/s in 4KB random read and write respectively.
That card would be okay for adoptable storage, the read speed is halved compared to the internal storage but application writing data or updating them is excruciatingly slow.
Knowing the baseline 4KB random read/write speed of our internal storage and the usual SD cards, I would personally aim for at least 5MB/s read and 1.5MB/s read.
Higher end 32-64GB cards are usually capable of 7-10MB/s 4KB random read and 2-3MB/s 4KB random write. While Samsung's Pro+ 64GB card is crem de la crem at 10MB/s and 5MB/s respectively, about as good as it gets with current NAND technology.
Unfortunately SD card manufacturers don't advertise 4KB random speeds so we have to find the information ourselves and hope some kind soul has purchased the card we're looking at and benchmarked it with a decent card reader. Your best bet is to google the card make/model + crystaldiskmark or scour Amazon, Newegg and so on reviews for benchmark numbers..
If you find a review that states 4KB random speeds in IOPS (Input Output operations Per Second), the conversion to MBps = (IOPS * KB per IO) / 1024.
So if you have
4KB random read 1200IOPS = (1200*4)/1024 = 4.68MB/s
4KB random write 400 IOPS = (400*4)/1024 = 1.56MB/s
And the other way around IOPS = (MBps / KB per IO) * 1024

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