[Q] Recognizing ext4 external SD - Galaxy S II Q&A, Help & Troubleshooting

After reading several threads here and over google, I decided to try formatting my external SD to ext4.
I downloaded MiniTool Partition Wizard and did everything as requested. It apparently did format to ext4, but my cellphone did not recognize the SD card.
I had to turn it back to FAT32 in order to be recognized.
I'm using dlevROM fully rooted.
I would appreciate if someone could help me thru this.
Thanks.

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erreum said:
After reading several threads here and over google, I decided to try formatting my external SD to ext4.
I downloaded MiniTool Partition Wizard and did everything as requested. It apparently did format to ext4, but my cellphone did not recognize the SD card.
I had to turn it back to FAT32 in order to be recognized.
I'm using dlevROM fully rooted.
I would appreciate if someone could help me thru this.
Thanks.
Click to expand...
Click to collapse
Why don't you format the sd card by using the phone itself?
I do not bother which file system is used as long as the read/write response times are OK and everything is stable.
And after formatting the sd card with your phone, it will be recognized ... that's for sure.

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Because when you format thru the phone it formats in FAT32. And I don't wan't to use FAT32, I must use a file system which enables me to copy files over 4GB.

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I've tried once again today to format my microSD. This time I tried to ext3, but the result was the same.
After formatting via MiniTool Partition phone says it's damaged and asks if I want to format. After formatting thru the phone it returns back to fat32 and works perfectly. I REALLY don't know what to do anymore.
May you guys please help me?
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I've been trying for the last couple days too, I don't think its possible without some OS changes. Hopefully ICS will handle it better.

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If all you care about is being able to have files > 4GB, you might try NTFS instead of ext4. There is a kernel mod floating around that will let you use NTFS-formatted SD cards; IIRC, it's called ntfs.ko. A search might turn up something.

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Try this on a shell (terminal app or adp) after formatting the card to ext4:
Code:
su
mount -t ext4 /dev/block/mmcblk1p1 /mnt/sdcard/external_sd
ignore the "damaged card" message and try to access it via a filemanager.

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erreum said:
I've tried once again today to format my microSD. This time I tried to ext3, but the result was the same.
Click to expand...
Click to collapse
Do you know for sure that the ROM/Kernel that you're using supports ext4 partitions? ext4 should be enabled at kernel to be able to use it in your phone, else the kernel doesn't know what you're trying to mount and it won't work.
If you're sure it should work, try partitioning the SD card with another tool, such as GParted. There are some partitioning tools that don't work well in certain situations. Try loading the partitioned SD card on GParted and see if it displays correctly the partition information. Maybe the program you're using isn't saving the info correctly.