Hey guy's I recently purchased a 8 GB MicroSD card and I got it in the mail today, so before putting it in my phone I put it on my computer and it doesn't read 8 GB it reads 7.59 GB. Why is this?
Capactities will never be exact. That is true of flash drives, hard drives etc. My iPod is theoretically 80GB but is actually only 76. Annoying...but that's just how it is
http://www.technical-assistance.co.uk/kb/hddsize.php
same thing really it's been the case for eons
sd cards
well they are true about how they always vary in capacity for posted size but for hardrives it usually actually is withing a couple percent, where as flash being very unstable memory can come with no memory lol, but also some of the memory is take up by foratting the device to work with operating systems and able to hold files and everything
That's because drive manufacturers measure like this:
1MB = 1000KB
1GB = 1000MB
And operating systems measure like this (the correct way):
1MB = 1024KB
1GB = 1024MB
So the card you bought has 8,000,000KB. The manufacturer claims that's 8GB. Windows sees it as...
8,000,000KB / 1024KB per MB /1024MB per GB = 7.629GB
Then a little bit of space is used for formatting, which leaves us with 7.59GB.
yeap!!
gtg465x said:
That's because drive manufacturers measure like this:
1MB = 1000KB
1GB = 1000MB
And operating systems measure like this (the correct way):
1MB = 1024KB
1GB = 1024MB
So the card you bought has 8,000,000KB. The manufacturer claims that's 8GB. Windows sees it as...
8,000,000KB / 1024KB per MB /1024MB per GB = 7.629GB
Then a little bit of space is used for formatting, which leaves us with 7.59GB.
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Must of user needs to know how sizes arent exacts! just think about why it arent memoryes for 200MB over 256 or 32 not 30MB
Related
I just got my GNex few days back and I'm new to this exotic way it manage its data.
I installed some apps and some games that are have downloaded their data to the sd-card and some other stuff like nandroid backups and some roms.
The thing is when I get into Settings-Storage the numbers just does't fit. I'm missing close to 3GB of space.
Where is my lost space here?
That's normal.. 16GB really means 13.3GB after all the system stuff, etc is taken.
Just like how on an iPhone/iPod 32GB is actually around 29GB of user-useable storage.
This part OK and I'm fine with this.
Try summing up the numbers to see if you get 13.33GB.
I'm getting 10.37GB when summing everything there including the free space, so there's something very weird here.
It is not so much that it is missing, its the way its measured. Manufactures measure hard drive space one way, OS's read hard drive space in different ways.
Computers do not internally represent HDD or memory capacity in powers of 1024; reporting it in this manner is just a convention.[39] Creating confusion, operating systems report HDD capacity in different ways. Most operating systems, including the Microsoft Windows operating systems use the powers of 1024 convention when reporting HDD capacity, thus an HDD offered by its manufacturer as a 1 TB drive is reported by these OSes as a 931 GB HDD. Apple's current OSes, beginning with Mac OS X 10.6 (“Snow Leopard”), use powers of 1000 when reporting HDD capacity, thereby avoiding any discrepancy between what it reports and what the manufacturer advertises.
Read more here
Hope this helps
All the sizes are reported by the same software and are in the same units: total space, free space and so are most of the other categories.
I still don't get how can it be.
Total reported by the phone: 13.33GB
Apps: 2.66GB
Pictures, Videos: 1.41GB
Audio: 20KB
Downloads: 88KB
Misc: 2.63GB
Free: 3.67GB
----------------------------
Total: 10.37GB
AFAIK 13.33GB != 10.37GB
Ok looking at a 64gb card on craigslist (sandisk) I need to be able to TEST this card on the spot from my laptop to see if its good.
my usually program h2testw is useless. it tests the old way by copying files to fill the card and verifying. incase you don't want to bother thats 144 minutes to gets a 64gb card.
not only will my batter not last that long but I doubt he would WAIT that long for me to test.
even if I just test to 32gb point (not likely to be a fake at that point) its still over an hour.
There has to be a faster way to test this card.
is there a program out their that writes a small file to random areas of the memory card ?? for example right a file to the card "as if" the card already has 50gb of data on it.
is that "area" valid? if so the card is likely valid and would only take seconds to test
what about rapidly making a "fake" file to consume 40 or 50gig of "space" so the next file I write (my test file picture for example) would be higher up confirming if its real or not
that has to be a more reasonable way to tests these things than to wait 2.5 hours to read write to the whole stinking card.
any help would be greatly apprecaited.
I used to use http://www.mynikko.com/dummy/ (Dummy File Creator). If you don't enable random data it seems to be pretty fast. I made a 16GB file in like 10 min. but that was to an internal SSD and your mileage may very. I would try it out first before you do it for real.
sadly that is doing almost exactly what h2testw does it actually writing a file to the disk so it will take the same 144 minutes (your SSD is just a lot faster than a usb stick)
nerys71 said:
sadly that is doing almost exactly what h2testw does it actually writing a file to the disk so it will take the same 144 minutes (your SSD is just a lot faster than a usb stick)
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Sorry about that. Here are some tips that may help:
Testing:
Most of these instructions apply to SD cards but can be used for other memory cards and USB drives as well.
1. If the card has a write prevention switch (as all SD cards do) put it in the Read only position and try to write to the card (if you can then it is a fake).
2. Reformat the card in you camera (if the card has an overstated capacity this will either fail or format the card with the actual amount of available space).
3. Copy a series of files to the card. Remember that most SD cards are formatted with a FAT file structure so files over 2GB can't be saved to them anyway. Try a series of 100mb files (recorded audio from Windows Sound Recorder found in the Accessories menu will do the trick, just record silence for ten minutes (no microphone needed)).
4. Copy a series of small files to the card :try text files or your temporary internet files. Do this until the card is full. (Testing capacity and the Master File Table).
5. If it is an SD card or similar put it in you camera and use the Video Record function :record for 30 minutes (or as long as you can) then wait for the camera to save the file. If the camera can't save the file and tells you the card is invalid then again you have a dud on your hands)
6. Attempt to open a large file directly from the card :a Photoshop file or even one of the silent audio files you recorded earlier will do the trick. You can usually connect you camera to you computer in Mass Storage mode to test this.
7. Use a program such as SiSoftware Sandra Lite (Free) to test the read and write speeds of the card. This software has built in benchmarks so you can compare the results to what you should be getting. This requires either a card reader or you camera to be connected in Mass Storage Mode.
8. Use KillDisk to view the contents of the card. Run the disk wipe on the SD card (which may fail with fake capacity cards) then view the contents again. When you scroll through the sectors move towards the end and look for changes that are out of place (the first 100 or so entries are the MFT and will be full of gibberish, then it should be all zeros :if it is 99 instead of 00 you have a card with overstated capacity).
9. Finally before you complain to the seller check that you camera can actually read the card :by this I mean many cameras can not handle cards with a capacity of over 512mb, just because you found someone on the internet whose camera could doesn't mean yours will so check the manual (different ROM versions for different countries can impact this :Canon in the USA and Canon in Australia often have subtle differences in the ROM image).
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EDIT: Oh and I got the tips from this guide --> http://reviews.ebay.com.au/How-to-t...d-USB-Drive-CF-MMC-Etc?ugid=10000000001287720
For files I would use Dummy file maker to make say 4 150MB file ahead of time and copy them over when you are there. The two times I had fake Cards they wouldn't write properly and the files would be gone after removal. Once formatted it showed the 16GB was only 8GB. So number 1 and 2 above are what I would try for sure.
,Using dd you can direct write to bytes... eg.. dd if=myFile of=/dev/sdb1 seek=32000000000000 which will skip the number of bytes in the seek field, then write your file to /dev/sdb1. If you pull that back off your card using the "skip=32000......" you can verify that with a hex editor.
Hope that was helpful
see "man dd" for more.
can you clarify this DD thing? what is it? the plan ideally is to copy a picture to spaces on the card and then "read" the images back off to verify they are good.
how do I use this DD to do that and where do I get it?
nerys71 said:
can you clarify this DD thing? what is it? the plan ideally is to copy a picture to spaces on the card and then "read" the images back off to verify they are good.
how do I use this DD to do that and where do I get it?
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Click to collapse
Its a linux command. You can write to any block on any disk from a file and read from any block on any disk to a file. Get linux here: http://ubuntu.com/download
By far the most efficient way to test for fake memory cards is to run the H2 burn in test. H2 is basically standard testing software for the flash memory industry in China and Taiwan. The program writes data into the flash memory up to full capacity, and then verifies all of said data. If the program fails, then most likely the flash memory has been set at a fake capacity (for example, flash memory was originally 512MB but set at a fake capacity of 2GB and sold as 2GB) or the flash memory is of low quality, with many bad blocks/sectors. Basically if the flash memory product does not pass H2, then the product is not a reliable storage solution. For a video tutorial on how to use H2 as well as more info on the program check out http://www.chinaelectronicsinsider.com/technical/how-test-fake-flash-memory
Problem is such software is utterly useless to protect oneself with.
once you BUY the flash drive there is no give backs. its yours.
this software takes LITERALLY HOURS (3.4 hours for the 64gb flash drive)
NO seller is going to stand their for 3.4 hours while I test the flash drive.
what we need is a random smaller test set.
write a file verify it. write another at 1gb mark test it write another at the 2gb mark test it 4gb 5gb etc.. ie something I can do in 5 minutes.
Random smaller tests while more practical are not at all efficient for larger capacity memory drives. If a buyer is intending on using the full capacity, better to test it all. A 10GB drive can be set at 16GB, and if a buyer only did a successful 5 minute test of say up to 8GB, then would still have been duped and will be missing out on an extra 6GB of storage. Also, with some upgradeable USB controllers, once the storage has been used past the actual capacity and begins having errors, often times the drive will become problematic afterwards and the actual capacity is not even reliable for storage. In these cases, the only way to regain the actual storage capacity would involve running a low level format using the corresponding MP tool, which is a technical process beyond the scope of the typical flash memory user.
problem is the test itself is literally USELESS for protecting oneself once you get into truly large capacities like 16gb 32gb and 64gb
it would take almost 3 hours to fully test a 64gb card.
NO ONE and I mean NO ONE and justifiably so is going to stand their while you run a 3 hours test on a $50 drive. they just are not going to do it.
what we need is a piece of software that will write 1mb per gb. so write a MB confirm it. then write another mb at the 1gb mark then at the 2gb mark then at the 3gb mark etc.. etc..
while this won't confirm a good or bad memory card IT WILL confirm a "fake" or "real" memory card which is the primary issue at hand.
ChinaElectronicsInsider said:
Random smaller tests while more practical are not at all efficient for larger capacity memory drives. If a buyer is intending on using the full capacity, better to test it all. A 10GB drive can be set at 16GB, and if a buyer only did a successful 5 minute test of say up to 8GB, then would still have been duped and will be missing out on an extra 6GB of storage.
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Click to collapse
This is not correct. That software should NOT stop at 8GB, this would be stupid. Let it go the the max capacity, and you're pretty safe.
In most cases (fake drives), you don't have to actually test each and every bit of data, he's right.
I got my (allegedly) 16GB Note 2 on Saturday and installed loads of stuff, including some pretty big Gameloft games. When I go into Storage from the Settings it says that my device memory has total space of 10.36GB with 2.98GB of it left. The fact that 7.38Gb is used up is probably about right given all the large games I've got on there, but why is the total space only reporting as 10.36GB when it's a 16GB model I bought? I'd expect some space to be used up by the OS itself and the various protected system partitions that come with it obviously, but does Jellybean really consume the GBs of space that make the difference between the 10.36GB reported and the 16GB that should be on there?
I used a disk info app to see what was going on and have attached a screenshot of it's output. I'm not sure what the difference is between the Data and SD card partitions there. Note that I do have a proper external SD card in the phone but it's only 2GB and so isn't any of those partitions. Anyone know what I'm seeing here and where my 16GB has gone?
Yes, this is the available amount of of space you get in this phone.
Its not just this phone! Any phone you get from market will have less user-available storage.
One X is said to be 32 gb but you can use only 25 gb
Here is a mod whoch can increase your space to around a bit above 11 gb http://forum.xda-developers.com/showthread.php?t=1931500
Any 16 gb phone made has around this much user available space rest is OS and other stuff.
HINT: buy a 32 gb memory card? it will replace your internal memory card need exactl as if it was internal memory storage.
How? You can transfer all apps to SD Card using titanium backup so your phone memory and SD card memory is basically unified.
Read this: http://compreviews.about.com/od/storage/a/ActualHDSizes.htm
Partitions of the SGS III (I assume pretty much the same in Note II):
/system: 1G
/data: 11G (shared with /sdcard)
/cache: 1G
Add to this space required by OS and installed apps.
Kiahnlliya said:
Partitions of the SGS III (I assume pretty much the same in Note II):
/system: 1G
/data: 11G (shared with /sdcard)
/cache: 1G
Add to this space required by OS and installed apps.
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Click to collapse
The 'Advertised vs actual' factor as described in that article would take just over 1GB away from a 16GB start (70.3 MB x 16 = 1.12GB).
Adding in the Cache, System and Data/SD Card values from my screenshot would take us up to 13-and-a-bit GB. (1.12 GB + 1GB + 1GB + 10GB = 13.12GB)
The System partition hold the OS and any other baked in stuff (as I understand it) so where's the other 2-and-a-bit GB?
I'm sure it's all explainable so I'm just curious to know how this works. I thought I remembered having more free space on my previous Note and the GSII before it (both of which were advertised as 16GB) but perhaps I'm misremembering.
Medulla said:
The 'Advertised vs actual' factor as described in that article would take just over 1GB away from a 16GB start (70.3 MB x 16 = 1.12GB).
Adding in the Cache, System and Data/SD Card values from my screenshot would take us up to 13-and-a-bit GB. (1.12 GB + 1GB + 1GB + 10GB = 13.12GB)
The System partition hold the OS and any other baked in stuff (as I understand it) so where's the other 2-and-a-bit GB?
I'm sure it's all explainable so I'm just curious to know how this works. I thought I remembered having more free space on my previous Note and the GSII before it (both of which were advertised as 16GB) but perhaps I'm misremembering.
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Click to collapse
It would be interesting to get a clear answer for sure... I have a 64GB SDXC with 30GB free space on it and I can't think of anything else I would need that isn't already on there, I couldn't fill it up even if I tried. Also I still have 8GB free on my internal...
I don't listen to music on my phone, I have a dedicated player for that, so that's why I don't need tons of space... and that's why I don't really reflect on these things, but am a bit curious indeed about why the available space is so much less than 16GB.
Kiahnlliya said:
It would be interesting to get a clear answer for sure... I have a 64GB SDXC with 30GB free space on it and I can't think of anything else I would need that isn't already on there, I couldn't fill it up even if I tried. Also I still have 8GB free on my internal...
I don't listen to music on my phone, I have a dedicated player for that, so that's why I don't need tons of space... and that's why I don't really reflect on these things, but am a bit curious indeed about why the available space is so much less than 16GB.
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My usage is pretty much the same as yours (external SD card with a few things on it and separate dedicated mp3 player) so it's not something I'd usually notice either. The only reason I've clocked it this time is because I bought a few GB and bigger sized games in the recent 25p Google Play store all of which I've installed as soon as I set the phone up on Saturday; whereas usually I'd install one 'proper' game and only install a new one when I'd finished the last one. So, as such, this is probably about as full as my phone will ever be and not something that'll cause any problems, but it would be good to understand what's going on here.
I keep getting not enough memory when I try to transfer a 5GB mkv file to my 16 GB ex SD card.. The card is practically empty so there plenty of file room.
Anyone else have this problem?
Orion78 said:
I keep getting not enough memory when I try to transfer a 5GB mkv file to my 16 GB ex SD card.. The card is practically empty so there plenty of file room.
Anyone else have this problem?
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What format is the sd card? I don't know about exFat, but fat32 can't handle files larger than 4gb- that was one of the benefits of ntfs in the computer world.
As a side note, the 4gb limitation can seem slightly misleading - if the correct definition of a gigabyte is used, then 4gb is the limit. If the new, wrong definition is used, then 4.3gb is the limit (approximately). A true gigabyte is 1024 megabytes, but a few years back most manufacturers started defining a gigabyte as 1000 megabytes (they also changed the megabyte from 1024 kilobytes to 1000, etc). They claim that the new definition is easier to understand, but in reality all it does is allow them to claim a higher capacity - this is why a brand new 16 gb sd card will only have a little over 14 gb of storage, for example
Sent from my SPH-L710 using xda app-developers app
I just downloaded AIDA and my S20 is showing 14Gb Ram only, does anyone has the same issue?
Jgabriel88 said:
I just downloaded AIDA and my S20 is showing 14Gb Ram only, does anyone has the same issue?
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1.8 gb of that 16 is reserved
Jgabriel88 said:
I just downloaded AIDA and my S20 is showing 14Gb Ram only, does anyone has the same issue?
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Click to collapse
Every phone has a certain amount of RAM reserved for the OS and etc.
You never get the full % of the amount of RAM they say the phone has.
hmmmm actually you just need to get used to the marketing speak that manufacturers use to cheat consumers.
In computer speak, 1 GB = 1024MB, or 1,073,741,824 Bytes
In marketing Speak, 1 GB =1000 "MB" or 1,000,000,000 "bytes"
Your phone's OS talks in computer speak, hence 16,000,000,000 bytes = 14.9 GB
the "RAM reserved by OS" is just a con. The OS reserves only about 500mb to 1gb of ram.
The phone manufacturers got "worried" about people questioning them, and starting faking display in their in system apps showing 16,000,000,000 bytes as 16GB so that non IT people won't be making any noise. However, if you use a proper app, you'll see only 14.9 GB.
Perfectly normal.
There is indeed 16GB physical ram installed.
Isn't it the same with SD and micro SD cards?like I have a 1 TB. micro SD card but as soon as you pop it in to the phone it registers 0.93 gb.