Develop Bugs

[Q] Ext3 on 16gb SD Card

Hello.
I have bought a new SD Card (kingston 16gb Class4).
I had a lot of problems with ext3 make. By Gparted it have errors.
I have readed this topic.
Can I repair my SD Card?
Sry for my english.

How are you connecting the card? Via a card reader or still in the phone? If it's still in the phone make sure you are in recovery and not booted in to android.

I made it by card reader. Formatting and partitioning by recovery - errors.

Have you tried erasing all the partitions and creating them again? What happens if you click the 'Repair' button?
I've always done my partitioning with my card in the phone, connected to my PC while in recovery and used Minitool Partition Wizard for Windows (this software was suggested in a thread I read a while ago) and never had any problems.
There is also the possibility of the card having a hardware problem, so you might need to swap it under warranty.

yes, first i have erased all partitions (deleted)
On repair ext - error, fat32 works fine.

first make an extended partition for your fat32 and inside that a primary fat32.
The unallocated space make it ext3

snowboard said:
first make an extended partition for your fat32 and inside that a primary fat32.
The unallocated space make it ext3
Click to expand...
Click to collapse
shouldn't both partitions be primary (no extended ones)?

erase everything 1st keep it unformatted then create fat32 primary then ext primary (optional linuxs swap) this is what i have done when installed miui rom data2ext

i suggest you dont use that card reader try through the cell....

I have tried a lot of methods - ext still no works.
Sent from my HTC Desire using XDA App

Where did you get the card from?
Stupid question but two of my friends bought cheap (fake) cards from eBay and both had problems with them, either the card kept losing data or they go errors loading from the card due to the poor quality. In which case you need to spend a little more and get a proper card from amazon on a high street retailer.
If not then as suggested use try formatting and partitioning the card through the recovery on your phone, most of the up-to-date recoveries can do this and it's the easiest way to get the card ass needed for a2sd etc. if it still doesn't work then take the card back it's probably faulty.

I bought this card too and even though I had no issues formatting the card I do have speed issues with it. I've been in contact with Kingston and they're looking into it. My writing speed is 1.6Mb/s....
But now a tip for you, I couldn't use Gparted since it's Live CD wont start my monitors. So I downloaded Easeus Partition Master. Very easy to use and it worked perfect.
Start with your Fat32 partition and then your Ext partition.
You can find the program here: http://download.cnet.com/Easeus-Partition-Master-Home-Edition/3000-2248_4-10863346.html
Sent from my HTC Desire using XDA App

My arc cannot recognize formatted SD cards, help?

I've tested two sandisk class 4 SD cards.
If I format it to fat32 and partition the space(to use link2SD), my phone refuses to use the SD card and says it's not there. I use minitools for partition and the official SD card maker software for formating. I did everything by the book and tried multiple options(different labels, ntfs, ext2, etc.)
A fresh, unallocated space card works perfectly fine however.
My phone is rooted and unlocked bootloader running softMIUI rom with a modfied power saving blend kernel.
Please help! This is confusing the hell out of me.

Was looking at your post and I decided to grab a few of my MicroSD card 1gb, 2gb, 4gb, 8gb and 16gb....
I formated all of them on windows .... right click format, all default settings... Fat32. These are MicroSD cards that have had information on them... they all run fin on my arc. All different brands.
This leads me to believe that there's possibly either something wrong with the MsD card or the reader on the phone.

fluxgfx said:
Was looking at your post and I decided to grab a few of my MicroSD card 1gb, 2gb, 4gb, 8gb and 16gb....
I formated all of them on windows .... right click format, all default settings... Fat32. These are MicroSD cards that have had information on them... they all run fin on my arc. All different brands.
This leads me to believe that there's possibly either something wrong with the MsD card or the reader on the phone.
Click to expand...
Click to collapse
Solved it
Did this:
Changed the partition id to this:
"0*06 fat16,greater than 32 mb"
and made the second partition fat32 as well.
Removed the 100mb linux swap file partition I created....not sure if that was necessary.

[Q] 32gb sd card issues. Missing files after partitioning 2nd ext.

Ok so. At first I thought it was the 32gb card I bought on ebay so I just returned it and bought another class 10 32gb adata card from another seller. This time I did a surface scan and chkdsk ahead of time to make sure everything checked out before I started using it. So as one partition as fat32, everything works fine, md5's verify successfully for nandroids after backing them up to external sd. Until I go to partition the sd card for fat32, and ext4, ext3, fat32 (tried every format). Tried mini partition, easus and Gparted outside of windows. Minitool shows it as "other" format when I try to partition the second ext4 partition. (which is odd)
After I do that, the fat32 begins to not show files that are copied to it. I noticed this while doing a routine nandroid through recovery, then when checking the cwmr folder on the external 32gb card, the files aren't there. NOW after reformatting and testing again, I'm getting the nandroids to show up, but the md5 verification fails.
I'm not sure on what the issue is. I just want to have a damn ext4 partition for mounts2sd.
Is there *anything* I can do further to verify if the card is in fact faulty aside from a surface scan test? Or is that sufficient?
Could it be my phone's sd card reader?
Could the kernel's "usb fast charge" enabled cause an issue?
I'm on the stock latest tmobile-samsung firmware, rooted.
Using stable kernel:
[KERNEL][3.0.90][Tiberius 4.1.2 T989UVMC6][Hercules]

Just to be sure I understand this correctly you want 2 partitions on an SD card? I would not recommend this personally as SD cards are not really designed for that...
But I could be misunderstanding you...
Sent from my SAMSUNG-SGH-T989 using xda app-developers app

Yeah, so I can have a script for mounts2sd use the ext4 partition to install apps to.
However, I'm looking for the sure fire way to test your SD to see if it's faulty or not. Is a surface scan test enough? Is there more?

I guess it's gotta be the card.. Just thought it was odd that it happened with two brand new 32gb sd cards from separate sellers.
Just put in my 8gb and everything works fine, md5's match and everything...
Oh well, return time!

[Q] P601 64GB sdcard unwritable

Hi folks,
I recently got a 64 GB microsd card ( class 4) for my galaxy note 10.1 SM-P601 ( build:JSS15J.P601XXUBMJ9,Baseband601DDUBMJ1).
This card works fine when I use it on my laptop but I am unable to write it on the tablet.I am able to read the data though.
Below is the list of what I have already tried and failed.
1)I have tried rebooting,remounting reinserting
2) As the default format was exFAT I reformatted it into fat32 using fat32 formatter.
3) I tried partitioning the card on laptop into 2 32gb partitions and then using it on the tablet.
4) I have tried SD card accelerators from Play store.
Once I mount the sdcard it shows TOTAL SPACE: 62.5 GB in Settings->General->Storage.When ever I try to write the card it somewhat gets unmounted and shows TOTAL SPACE :0.0 bytes.
Please suggest a solution to make it work

maainux said:
Hi folks,
I recently got a 64 GB microsd card ( class 4) for my galaxy note 10.1 SM-P601 ( build:JSS15J.P601XXUBMJ9,Baseband601DDUBMJ1).
This card works fine when I use it on my laptop but I am unable to write it on the tablet.I am able to read the data though.
Below is the list of what I have already tried and failed.
1)I have tried rebooting,remounting reinserting
2) As the default format was exFAT I reformatted it into fat32 using fat32 formatter.
3) I tried partitioning the card on laptop into 2 32gb partitions and then using it on the tablet.
4) I have tried SD card accelerators from Play store.
Once I mount the sdcard it shows TOTAL SPACE: 62.5 GB in Settings->General->Storage.When ever I try to write the card it somewhat gets unmounted and shows TOTAL SPACE :0.0 bytes.
Please suggest a solution to make it work
Click to expand...
Click to collapse
Have you formated it in the GN 2014?
Also, I wouldn't use a Class 4.. Just my opinion.
Also, they have some bad 64gb cards out there.. I would get a name brand 64gb class 10 from BestBuy, Staples, etc.. Format it GN 2014. If everything works, then the problem was the sd card.
I have a Sandisk Ultra 64gb Class 10 in my GN 2014 and my Note 3.. both work perfectly.

Hi gurus,
The Idea is to make the the 64 gb card (that working fine on my laptop) work on my note 10.1.
Please help .
What could be the possible reason.

maainux said:
Hi gurus,
The Idea is to make the the 64 gb card (that working fine on my laptop) work on my note 10.1.
Please help .
What could be the possible reason.
Click to expand...
Click to collapse
As you have tried several things, can you please tell us exactly what your situation is now so we can help you.

If the card is a used one, it may have been formatted as FAT32, to work in a non-Sdxc compatible device. The Sdxc capable note may boycott the card because of violation of the specs, so reformat it to exFat.
It was similar with 4GB SD cards, which shall not exist by spec, but worked fine in Sd devices, not in Sdhc ones.

Experiencing the same
maainux said:
Hi folks,
I recently got a 64 GB microsd card ( class 4) for my galaxy note 10.1 SM-P601 ( build:JSS15J.P601XXUBMJ9,Baseband601DDUBMJ1).
This card works fine when I use it on my laptop but I am unable to write it on the tablet.I am able to read the data though.
Below is the list of what I have already tried and failed.
1)I have tried rebooting,remounting reinserting
2) As the default format was exFAT I reformatted it into fat32 using fat32 formatter.
3) I tried partitioning the card on laptop into 2 32gb partitions and then using it on the tablet.
4) I have tried SD card accelerators from Play store.
Once I mount the sdcard it shows TOTAL SPACE: 62.5 GB in Settings->General->Storage.When ever I try to write the card it somewhat gets unmounted and shows TOTAL SPACE :0.0 bytes.
Please suggest a solution to make it work
Click to expand...
Click to collapse
Hi maainux, I'm experiencing the same problem here, have you found any solution?
Mine is a SM-P601 / Android 4.3 / Build: JSS15J.P601UBUBMJ4 / Baseband: P601UBUBMJ1 (Fully Stock)
I tried 3 64gb micro sd card: SanDisk Ultra, Samsung, and a generic one. For both 3 the same results, as following:
1 - If I let the tablet format the card (exFAT), it can be mounted but gets suddenly unmounted when I try to write on it and shows TOTAL SPACE :0.0 bytes just like yours. I installed BTSync, when I tried to configure the sync on the tabled by selecting the sd card as the destination folder for the files, the app give a message saying it don't have permission to access that folder and gets unmounted. Tried rebooting, remounting, reinserting, and nothing change.
2 - If I format to fat32 as a logical partition using Minitool Partition Wizard, I get the same behavior as above description.
3 - If I format to fat32 as a primary partition using Minitool Partition Wizard, I can create folders but can't delete them, when I try to delete via "My Files" it says "deletion failed". I tried ES File Explorer, get the same. I was able to configure BTSync, it can copy the files from my PC folder, but when I delete some file in the PC it can't be deleted on the tablet and the BTSync app shows a message stating it can't identify the destination folder on the tablet.
I have some micro sd cards laying around, tried SanDisk 32gb, 16gb and 8gb, both 3 worked flawlessly on the tablet. I noticed the tablet format any <32gb card as fat32, and the 64gb as exFat, this make me think that was related to file system format, but it's not. Seems something related to permissions, like the KitKat 4.4 guys are experiencing. The point is I'm completely newbie on Android and have ZERO knowledge on Linux/Unix, so I have no Idea on how to solve this.
Can you guys help me?
Thanks in advance.

Hi guys
have you found any solution?
Thanks

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).