exfat | Free exFAT file system implementation | File Utils library

I was compiling twrp for moto g40 fusion codenamed hanoip using kernel sources, but got this error /bin/bash: -c: line 0: unexpected EOF while looking for matchin`"'

/bin/bash: -c: line 1: syntax error: unexpected end of file

I got this error when

BOARD_USES_RECOVERY_AS_BOOT := true

But after changing the value to false everything was fine.

The problem here is that BOARD_USES_RECOVERY_AS_BOOT must be true for twrp to boot.

here is the build log when BOARD_USES_RECOVERY_AS_BOOT := true

I just follow the instructions of this page but found the disk space of folder occupying via create-react-app command is intimidating 5GB!

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But this action above was done on my external disk. I did the same action on my Built-in hard drive and found the disk space of newly created folder is only 244M. Why the difference is so huge and how to resolve it? I guess it is caused by disk fragmentation, but I googled it and it seems that the Mac does not need to be defragmented. My external disk is ExFAT format.

Is this normal? Thank you!

I'm writing a program that copies the FAT to a file (and restores it). I'm using CreateFile to open a drive letter as a file, SetFilePointerEx to seek to 0 position, ReadFile to read the contents of the drive, and WriteFile to write to the drive.

Using this strategy I can basically copy the entire drive. However, how should I know where to start and when to stop? Basically, what I want to know is the location of the beginning and the end of File Allocation Table in an exFAT disk.

Here's the code that I use to run the backup for the first 4 GB of data:

I don't use /dev/sdb and I can't delete it. In Azure->Disks i have only my Os_Disk 30GB, in VM tab in Disks there is also only Os_Disk. fdisk -l shows 2 disks:

I am new to embedded development and have been tasked with implementing a file system on SPI flash memory. I am using a w25qxx chip and an STM32F4xx on STM32CubeIDE. I have successfully created the basic i/o for the w25 over SPI, being able to write and read sectors at a time.

In my user_diskio.c I have implemented all of the needed i/o methods and have verified that they are properly linked and being called.

in my main.cpp I go to format the drive using f_mkfs(), then get the free space, and finally open and close a file. However, f_mkfs() keeps returning FR_MKFS_ABORTED. (FF_MAX_SS is set to 16384)

Trying to implement the exFAT boot checksum as described in section 3.4 of:

https://docs.microsoft.com/en-us/windows/win32/fileio/exfat-specification

My code does not produce the correct checksums. :(

Already thanks for your time.

I'm a little lost on how can I debug a problem I have with FatFs: write then read files inside folder brings me invalid data. but on the root, it work flawessly.

note:

• I'm working on a bar-metal nrf52832 using FatFs 14.
• The nrf52832 talk on spi to an external flash MX25L32 (4Mb, 512b/sector, 4096/block)
• I have disabled the relative file path, so I use only absolute path.
  • (I'll join "ffconf.h")

I have the following problem :

• If I write then read a file on the root, it work flawlessly (tested with 10k file)
• If I write then read a file in a subfolder I read somethings strange (even with small file).

and here's the code that I use (cb_littlecodethatfail is called via an RTT terminal):

I have recently bought a USB, which is initially formatted using exFAT. Then I tried wiping it off and format it with ext4. But then, Linux Mint 20 doesn't seem to be able to mount it. When I checked the "disks" utility, the USB appeared, but it just displayed the loading loop. I tried to cancel the mount job, no luck either. Then I tried a live Linux Mint 19, also can't open the USB, so this is clearly not a problem with my existing computer.

Then I booted up my Windows copy (dual boot with Mint 20), plugged the USB in, formatted it to exFAT, and Windows can then open it. Then I boot up Mint 20 and live Mint 19 and both can open it. So my question is, do USB manufacturers restrict the type of filesystems a USB can have? I have never heard of this phenomenon, and can you give me some source to read more?

I tried to do some write/read operations on filesystems that I have enumerated for. The problem is when I want to write to other volumes rather than my self (fs0), it will return WRITE PROTECTED Error.