Develop Bugs

Help issues with Kingston 16G card with A2SD

Hi all,
I've recently changed my SD card to a 16G Class 10 Kingston card, and having huge issues with roms with A2SD. The issue i have is as follows
ROM takes a long time to flash, but boots up ok. A2SD is working - apps are being installed to EXT3.
When i reboot the rom, it usually does not start up again - it remains on the HTC white boot screen. If i remove the battery and reboot - it boots up ok, but then i get force closes on random applications.
I have formatted the card using ROM Manger, GParted and Mini Tool Partition. I can not seem to resolve this issue. I have checked the Card, and all seems ok
Looking for ideas.......
Thanks

Kingston SD cards have serious compability issues. I experience similar issue with a Kingston SD card.
The only reccomendation I can make is to sell it and get a Transcend SD

weird memory card problem

i just got a kingston micro sd 8gb class 4 card
previously i ran a 2gb unbranded card and it worked fun.
ever since ive started using the new card, the phone is hanging and it gives i/o errors in windows. its file systems are also corrupted sometimes. ive used all roms on it from miui to leedroid to rcmixhd, everywhere there is the same response
and with the 2gb card it works flawlessly
i checked the card with hd tune pro and it looks fine in the test
let me know how can i check the integrity of the card

Run a checkdisk with repair option.
Another way is to backup all the data from it and then run a full (not quick) format.
Also install h2testw and test it with it.
http://download1us.softpedia.com/dl...aff/100149366/software/system/h2testw_1.4.zip

SDCard 16GB - Gparted / Phone show 12GB

So.. i was installing RCMixHD Rom yesterday, i partitioned my card as follows (using Gparted in Ubuntu):
FAT32 14GB
EXT2 2GB
This Rom is awfully bad, it crashed few times and freezed that i couldnt even reboot so i had to remove battery when it was still running.
I decided going back to CM7 but i just realised that SD Card size is 12.84GB, and Gparted doesnt show any partitions on it, what the heck?

Use a card reader or connect the sd while in recovery and make sure all the partitions get mounted.
If android is booted the ext partition doesn't get mounted. Also if you created your ext partition while android was booted that probably messed up the ext partition and that's why the rom doesn't work right.

First of all a 16 GB cars is more likely 15 Gb in real life.
Moreover, the phone does not recognizes the ext partiton in the SD card menu (in settings), just the FAT32 one.
So 15GB-2GB-possibly some unpartitioned for data = 12.84 GB
That's OK.

Thanks, i think it's fixed now i got 14.8GB of space available again.

Is that a class 10 card? i am trying to figure out which card should i get for my desire, after bad experience with kingston 16gb class 10.

Its Class 4 Sandisk SD card.

if you want to partition the card try ext 3 for a2sd+
Minitool Partition manager is the way to go to create ext partitions on a sd card
free too..

[Q] Ext4 Memory Card 64 GB cannot be formatted

Dear Brainaics
I've got an issue,
My sd card is 64 gb sandisk class 10
I was using Pro Bam android 4.4.1 on my n7100
So I formatted my memory card within the rom.. It was fat 32 or ntfs
Later I got some issues with the rom, So I installed the stock rooted rom.
Ever since that I've been getting an unsupported file system.
Format Card - It shows formatting - then unsupported file system error - This goes on and on.
So i tried mounting it in Linux Ubuntu & try to format using gparted & terminal.
My data is there.. The card reads & all.
But I can't format it.
These are all the steps i've taken, I even tried sd formatter I got somewhere from xda!
Any useful info would be greatly appreciated by me offcourse mentally.
I mean i crave for knowing the reason behind this anomaly!
Have a good day...
Cheers

Can you delete any files on the card? I had a 64gb SanDisk card that had all my data but I couldn't format it, copy files or delete files from it, either on my phone or laptop.
SanDisk replaced it for me as it had developed a fault.
sent from somewhere

External microSD Card Slow in LG G3, Fast on PC

I had a 128GB microSD card in my LG G3, a 128GB Samsung EVO Select microSD card. After only a year I was seeing slow read/write benchmark speeds (using A1 SD Bench) & was also seeing some lag so I replaced it with a 128GB Sandisk Extreme Pro. But the speed for the Sandisk is the same.
The app A1 SD Bench shows them both doing Read: 42MB/sec, Write: 38MB/sec. I've seen others that see speeds of 70MB/sec and higher. Both cards are formatted exFAT.
I'm concerned that maybe I've made tweaks using Trickster Mod that might have slowed the card down? Or could there be another reason? Thanks to anyone that can help.

I don't know what's causing that. I also had a problem with my LG G3 851 and the SD card. Basically the SD card died and I can't read anything from it nor reformat nor anything. It was a 128gb SanDisk, one of the faster ones, running Lineage OS 16.1. I ended up just figuring I didn't really need the SD card in my case. I'm sorry your's is running slow. All I can say is try to factory reset the phone back to stock and see if that solves the problem.

Factory reset ("saying a prayer") is too drastic a step and rarely solves anything, but I did solve the problem.
Using Desk Genius on my PC I created a single partition on the microSD card (Most people just format, you must create a partition first). Then using Windows 7 disk format I formatted the microSD card for exFAT, 128K cluster size. Now the microSD card flies!!!
It took me a full weekend of testing to come up with this. I tried using various tools to partition, and various tools to format, all with different cluster sizes. This gave me the best performance.
Tools included Disk Genius, EaseUS Partition Master, MiniTool Partition Wizard, Windows 7 built-in tools, and a lot more.
EDIT: I forgot to add, after formatting you need to go back into Disk Genius and do a 4K alignment check (it's in the Tools menu). Alignment to 4K boundaries prevents extra read/write cycles and improves performance.
If it fails 4K alignment then you need to partition and reformat all over again.

That's awesome! I'll keep that in mind if I go get another SD card some day. I didn't realize that the format could mess up the read/write speeds. I wonder if a wrong format made my SD card die. If I do get another SD card, this time I'll keep the receipt in case it stops working again. I had a PNY SD card die on me in my Surface 3 as well.

It's not just the reformat, you have to repartition as well. And I forgot to mention you need to check for 4K alignment too (I edited my OP).