whats is the difference between SD memory and MMC as my xda has a MMC 64mb extra thanks. I can buy both at similar prices
thanks
Hi,
In simple terms they both can be used. The MMC is marginally cheaper, the SD has some security stuff on it.
However I think you can only get SD in 256 and 512, and the SD costs are coming down
Related
What is the maximum capacity of SD cards that XDA supports?
Can I put 128MB SD card in XDA?
If you have used the search button or looked on other postings you'll have seen that the maximum capacity used in the XDA is in the moment at 512MB
(I don't now, if any bigger is available...)
So you can use your "small"SD card with 128 megs without problems....
Regards
Stefan
I want to buy a sd card but i m not sure which one is better
Lexar SD 256MB 32X Speed (about 70$) or
SanDisk 512MB SD (about 106$)
512 mb looks great choice but the other is high speed ???????????
i need your comments
sandisk is not know for it's speed as it is
but very fast SD cards will never reach their top speed
in the xda their sd interface is not fast enough
if you search the forum you'll find some guy who did some tests
think the sd card did 10MB /sec in the sdcard reader on the pc
and only about 1.3 MB /sec in the xda
not all that impressive
And for the XDAII? Waht is the speed of the port?
well i forget if it were tests made on the xda1 or 2
but arm 200 which the xda 1 have dont have a nativ interface
for sd so it use an external chip and the xcale 400 that the
xda2 have have a native interface
too bad that nativ interface is WAY slower then the external chips
pda's used to use
there were some posts before xmas about places where the xda it would be way faster then the xda2
but that was in the old forum not sure if those posts are lost now
here is a line from a writing about xscale's performance on ipaq
which i asume would be the same for xda2 unless they added a mem controller and dident use the internal xscale one
Because the XScale CPU itself contains an MMC controller that supports SD and SDIO, and that's almost certainly what HP is using, rather than adding a chip of their own. MMC and SD are very similar, almost identical. The difference is that MMC uses a 1-bit data bus, and SD uses a 4-bit bus. See, we're back to buses again. Since the XScale's controller is MMC-based, the new iPAQs will have 1-bit bus transfer rates. Hang on to your CF sleeves for big data.
Click to expand...
Click to collapse
from
http://www.writingonyourpalm.net/column020624.htm
ogn said:
I want to buy a sd card but i m not sure which one is better
Lexar SD 256MB 32X Speed (about 70$) or
SanDisk 512MB SD (about 106$)
512 mb looks great choice but the other is high speed ???????????
i need your comments
Click to expand...
Click to collapse
I got a Billington 512MB SD card 40x speed. It is OK. Cost about SGD$245.
Hi,
Can anyone having micro SD 2GB ultra card can tell us about its performance? I have heard that 2Gb card as such had some impact on the performance of the phone and slows it a bit down? Is there any improvement using this faster card?
I have SanDisk 2GB MicroSD - in my opinion it's quicker than my previous 1GB.
I have seen sandisk 2gb ultra II micro sd card in the market. I just wanted to know if it improves the performance over the simple 2gb micro sd card?
i have a SanDisk 2GB standard MicroSD and performance is great, no slow downs on anything.
its a lot faster than a 1Gb card (can't remmeber make, probably SanDisk) that was with my Universal, that was sloooow...
sorry that that doesnt really answer your question, but in my opinion i think that there isn't much gain in opting for the Ultra MicroSD card, as there's not anything wrong with the standard one!
Comparing performance with different flash cards, be sure they are formatted with the same file system (FAT16/FAT32) and the same cluster size. Instead, your comparision results ae meaningless.
Lurker0 said:
Comparing performance with different flash cards, be sure they are formatted with the same file system (FAT16/FAT32) and the same cluster size. Instead, your comparision results ae meaningless.
Click to expand...
Click to collapse
And what are the best in your opinion? (cluster size and 16/32)
sergiopi said:
And what are the best in your opinion? (cluster size and 16/32)
Click to expand...
Click to collapse
I'd suggest you to search for existing threads and articles.
There is no a one-for-all solutions. One thing that I'd recommend is to format with one FAT copy (again, do a search). Then, the bigger the cluster size, the better berformance, but, OTOH, the more space is wasted. With a statistics provided e.g. by SK Tools anybody may make their decision on how to balance. SK Tools also a good tol to format cards with.
As for FAT16 vs FAT32, this is the last thing to decide. If a chosen cluster size allows FAT16 for the card, better to use it. If it does not - you have no a choice but to use FAT32. The only drawback of FAT16 is a fixed root directory size, which is not a big isue with large (16K to 64K) cluster sizes required for FAT16 on big cards.
But the main point for this thread still is: comparing flash card speeds, use the same format parameters.
Had anyone done this kind of comparison on different micro sd cards?
It imaging that this level of testing is about pointless, the typical bottleneck here is likely to be the reader device, not the card.
The phone will likely be the slowest aspect, at least when compared to a desktop reader...
You might find a turtle that can sprint, but it will still be a turtle
I've got:
16gig Micro sd card (Class 2)
8gig Micro sd-card (Class 4)
If I format these both to a Fat32 with an Allocation unit size of 8192bytes. Will there be any performance increase? The 16 gig feels sluggish.. The icons load up around 10-30 seconds in boot up. (moved my apps to media.)
I'm currently formatting the 16 gig at the moment. backing up all my data.
Question is, Whats the best allocation unit size for SD cards in the 8-16 gig range? And is there a big performance step from class 2 to 4?
Cheers!
I'm no expert in these kinds of things, but I don't know if the allocation size will make a huge difference in the speed. The 8GB card will be faster by default because it is a class 4 and the other is a class 2.
Someone who knows more may be able to answer better than I can.
Big difference between class 2 and class 4 personally I think you should only by classic 6
Sent from my MB860 using Tapatalk
No, the sizes will affect how data is allocated. You can research it and see if there is a better one. Ususally just use default. Having too big sizes can mess with the efficiency of card handling it's overall size. I don't know how to explain, and hell couldn't even try as i'm sleepy and about to jump in bed. There can be speed differences, but nothing major that will make you want to choose a speicfic size or the other.
I voided my warranty and your mum.
As far as I know, smaller file allocations help if you have plenty of small sized files, and bigger file allocation sizes help when you have big files.
I always use default with pretty good results at least on Class 6 and up cards.
Cheers!
Sent from my Atrix using Tapatalk
I know, i can have external memory, but it is slow comparing to NAND internal memory
How much of internal memory will left after all the system? 11GB?
On my galaxy s 16gb (rough comparison) SD card partition is 13.4 and app partition is 1.8. Rest is system partitions.
Touchwiz will probably take a bit more and Samsung may partition differently.
Its enough for me end up with 4gb free
With 5gb music.
Sent from my SGH-T959 using Tapatalk 2
if i read it right the built in 16 gb will have 10.5 gb usable as internal sd which is 1 gb lesser than my sgs2. Thank god sgs3 has the sdcard slot .
bala_gamer said:
if i read it right the built in 16 gb will have 10.5 gb usable as internal sd which is 1 gb lesser than my sgs2. Thank god sgs3 has the sdcard slot .
Click to expand...
Click to collapse
I am getting the 64gb version plus the 64gb SD XC card I got now....128gb heaven....
pachi72 said:
I am getting the 64gb version plus the 64gb SD XC card I got now....128gb heaven....
Click to expand...
Click to collapse
Do you really carry 128 gb of data's with your phone. Then get a extra battery too.
Sent from my HTC One X using Tapatalk 2
forumhookersdotcom said:
Do you really carry 128 gb of data's with your phone. Then get a extra battery too.
Sent from my HTC One X using Tapatalk 2
Click to expand...
Click to collapse
Yes I do.. And that data is my music.. I don't like cloud streaming at all.
sent from a 96gb N7000
Taken from http://forum.xda-developers.com/showthread.php?p=25767422#post25767422
Partition sizes:
/system: 1G (might more: df command rounding error), 315Mb Free.
/data: 11G (shared with /sdcard, pure Ext4)
/cache: 1G
Mount options: optimized Ext4 settings (same as those introduced in Voodoo lagfix)
Sd Cards & additional storage.
Internal: /mnt/sdcard
External: /mnt/extSdCard
USB sticks: /mnt/UsbDriveA to FAK8975C
Click to expand...
Click to collapse
Damn ill take a 16 gb and 16 ext. Also the ext battery but deff not both 64.
Where have you seen info about extended batteries?
I never use more than 3 gig on my phone so 16 gig is plenty. Out of the 3 gig that I use, most of it is ROMs and kernels that are on it
... ... ...
I'll be happy with the 16GB one, already have a 32GB card but i may get a 64GB card too.
Yes. Put a 62 GB SD card in it and there you have it you will never run out of storage. Plus you can utilize the Dropbox Storage they give u
---
To each their own.
I think I'll buy a 32 Gb phone and buy an sd later as and when required. (Since internal memory is faster)
Sent from my HTC Desire using XDA
CoNsPiRiSiZe said:
Yes. Put a 62 GB SD card in
Click to expand...
Click to collapse
You meant 64 GB
i think ill grab a 16GB version of the GS3..already have class 4 32GB never used it had it on my note but i returned it due to pixel issues..still a virgin but now i might get the higher speed sandisk 64GB.. that way when i get new Nexus/NOTE2/GS4 ect.. ill just buy the ones that have the lowest GB built inn and just popped the 64GB.. im good with a built in 16GB..got to love this SD slots coming from a iphone/ipad user..still like my apple stuff but its time for a change
question ? whats faster internal memory or the new Sandisk card when the phone reads it..i mean the Sandisk reads 30mb sec* i mean that plenty fast already..will there be a big difference when the phone reads the internal memory or the SD high read cards.?
will my class 4 32GB work good enough on the GS3? will there be like a little lag due to its a calss 4? or thats good enough?
markysd said:
i think ill grab a 16GB version of the GS3..already have class 4 32GB never used it had it on my note but i returned it due to pixel issues..still a virgin but now i might get the higher speed sandisk 64GB.. that way when i get new Nexus/NOTE2/GS4 ect.. ill just buy the ones that have the lowest GB built inn and just popped the 64GB.. im good with a built in 16GB..got to love this SD slots coming from a iphone/ipad user..still like my apple stuff but its time for a change
question ? whats faster internal memory or the new Sandisk card when the phone reads it..i mean the Sandisk reads 30mb sec* i mean that plenty fast already..will there be a big difference when the phone reads the internal memory or the SD high read cards.?
will my class 4 32GB work good enough on the GS3? will there be like a little lag due to its a calss 4? or thats good enough?
Click to expand...
Click to collapse
No, there won't be any lag
Class 4 is good ....
Sent from my Xperia Ray using xda premium
I'll buy 32GB SGS3
Sent from my Xperia Ray using xda premium
markysd said:
i think ill grab a 16GB version of the GS3..already have class 4 32GB never used it had it on my note but i returned it due to pixel issues..still a virgin but now i might get the higher speed sandisk 64GB.. that way when i get new Nexus/NOTE2/GS4 ect.. ill just buy the ones that have the lowest GB built inn and just popped the 64GB.. im good with a built in 16GB..got to love this SD slots coming from a iphone/ipad user..still like my apple stuff but its time for a change
question ? whats faster internal memory or the new Sandisk card when the phone reads it..i mean the Sandisk reads 30mb sec* i mean that plenty fast already..will there be a big difference when the phone reads the internal memory or the SD high read cards.?
will my class 4 32GB work good enough on the GS3? will there be like a little lag due to its a calss 4? or thats good enough?
Click to expand...
Click to collapse
San disk 64gb is class 6
sent from a 96gb N7000
NAND memory, the integrated one, is the one used in SSD disks. It is faster than SD cards