The ExFAT File System Driver service is a file system driver. If ExFAT File System Driver fails to start, the error is logged. Windows 10 startup proceeds, but a message box is displayed informing you that the exfat service has failed to start.
the very first introduction of exfat had built in backwards compatibility with fat32 systems. However you couldn't write a file over 4tb in dos windows nor use disk and defrag utilities on exfat partitions. That patch on xp was replaced and there were patches for vista+ the original has since disappeared.
There are a few places left in the world to get it last seen 2018 I may try fetch it and confirm.
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I'm not sure if this is helpful, but there's an experimental exFAT driver for MS-DOS.
It's read-only and in an early stage, but it might be useful for file transfer (pendrive -> Win98 system / DOS 7.1).
Personally I don't see implementing >4GiB file support as being that much of an issue, because as I said the IFS API is very low level and you can talk almost directly to a driver from KERNEL32 but of course such support would be limited only to new FSDs written with such support in mind.
I must say it would be very nice to have such a driver, and/or be able to support >4GB files on 98. Especially for dealing with DVD .ISO's. This issue was discussed recently in my thread about flash drive problems.
not only that, exfat under win9x would have also required also a DRV or VXD driver for full exfat support, in case the DLL/SYS exfat drivers from xp/vista don't work under w9x. getting win9x to recognize and access exfat partitions is one thing; getting win9x to even read, write or format/partition exfat volumes is another.
Creating an ExFat driver is doable although a rather substantial task. It is when you go beyond the API limits, such as files larger than 4GB, that things get really hard. Tracking down all of the code that uses File Position information and/or the internal File Tables, and Patching them is a lot of work and requiring skills few people have. This is also why the Windows Resource issue is so hard to solve.
Why is the exFAT USB drive not recognized by Windows? After analyzing extensive user reports, we find the problem often occurs when there is no drive letter for the exFAT USB. Besides, some factors like outdated device drivers, a bad USB port, corrupted system files, and a faulty drive are also responsible for Windows unable to recognize exFAT drive.
4.- Booting process is very slow on x64, but there are links to download a modded exFAT driver to make the booting pocess faster. he also suggest to use a SSD device not mechanical HD. But also said after booting speed should be as usuall.
Most probably during first boot a number of things need to be self-adjusted by the OS, but it is also possible (due to the complexity of the procedure) that simply *something* went wrong, very likely the (well documented) issue with the exFAT driver signature:
When the exFAT driver added the built-in digital signature and tested the 64-bit system, the startup time of the 64-bit system was shortened from the original few hours to the same ten seconds as the 32-bit system. The problem was solved successfully!
I don't see - at face value - any reason (set apart the above and the "on VHD" way) why an exFAT volume should be much slower than a NTFS one (even if most probably the good MS guys have optimised NTFS booting sequence), at least during my (old, quick and dirty) windows 7 on FAT32 experiment I didn't notice any particular increased slowness of the system.
IMNSHO the tests should be repeated (and completed) before deriving any conclusion, in any case it would be easier to test the 32 bit version(s) as they don't need the replacement of the exFAT driver.
I am currently dual booting linux and windows on my primary SSD which is split with Ext4 and NTFS accordingly. However, I have a secondary hard drive where I would like to place my downloads and other large files.
As per the leaked Samsung drivers, they have been subsequently released under GPL license (you can find them here) but in all honesty I would trust NTFS-3G better even if it's over the FUSE layer (Samsung is interested in their products, I doubt they test the code on systems/kernels other than their own).
macOS can read NTFS volumes, but cannot write to them without the help of third-party drivers. Windows cannot read HFS, HFS+, or APFS volumes without third-party drivers. It's not clear that NTFS and APFS have ever been fully documented.
It appears that Windows XP could support exFAT (with a patch that is no longer available). Vista could support it with the installation of a Service Pack. I'd guess that there is not too much of a market for exFAT drivers for Windows NT/2000 or for Windows ME and earlier.
Additionally, a single bit in the directory record indicates that the file is contiguous (unfragmented), telling the exFAT driver to ignore the FAT. This optimization is analogous to an extent in other file systems, except that it only applies to whole files, as opposed to contiguous parts of files.
Linux has support for exFAT via FUSE since 2009.[4] In 2013, Samsung Electronics published a Linux driver for exFAT under GPL.[31]On 28 August 2019, Microsoft published the exFAT specification[7] and released the patent to the Open Invention Network members.[32] The Linux kernel introduced native exFAT support with the 5.4 release in November 2019.[33]
When the file system is mounted, and the integrity check is conducted, these hashes are verified. Mounting also includes comparison of the version of the exFAT file system by the driver to make sure the driver is compatible with the file system it is trying to mount, and to make sure that none of the required directory records are missing (for example, the directory record for the upcase table and allocation bitmap are required, and the file system can't run if they are missing). If any of these checks fail, the file system should not be mounted, although in certain cases it may mount read-only.
exFAT was a proprietary file system until 2019, when Microsoft released the specification and allowed OIN members to use their patents.[43] This lack of documentation along with the threat of a patent infringement lawsuit, as happened previously when Microsoft sued various companies over the VFAT long file name patent (before it expired), hampered the development of free and open-source drivers for exFAT, and led to a situation where Linux distributions could not even tell users how to get an exFAT driver. Accordingly, exFAT official support was effectively limited to Microsoft's own products and those of Microsoft's licensees. This, in turn, inhibited exFAT's adoption as a universal exchange format, as it was safer and easier for vendors to rely on FAT32 than it was to pay Microsoft or risk being sued.
Regardless of whether open-source or not, Microsoft stated that "a license is required in order to implement exFAT and use it in a product or device".[44] Unlicensed distribution of an exFAT driver would make the distributor liable for financial damages if the driver is found to have violated Microsoft's patents.[47][48] While the patents may not be enforceable, this can only be determined through a legal process, which is expensive and time-consuming. It may also be possible to achieve the intended results without infringing Microsoft's patents.[49] In October 2018, Microsoft released 60,000 patents to the Open Invention Network members for Linux systems, but exFAT patents were not initially included at the time. There was, however, discussion within Microsoft over whether Microsoft should allow exFAT in Linux devices,[50][51] which eventually resulted in Microsoft publishing the official specification for open usage[7] and releasing the exFAT patents to the OIN in August 2019.[32]
A Linux kernel implementation by Samsung Electronics is available.[58] It was initially released on GitHub unintentionally,[59] and later released officially by Samsung in compliance with the GPLv2 in 2013.[60][61] (This release does not make exFAT royalty-free, as licensing from Samsung does not remove Microsoft's patent rights.)[62][63] A version of this driver was first incorporated into version 5.4 of the Linux kernel.[64][65][66] A much newer version of the driver, with several bug fixes and improved reliability, was incorporated into kernel 5.7.[67][40] Prior to its being merged into the Linux kernel, this newer version had already seen adoption on Android smartphones and continued to be used on both Linux and Android thereafter.[68][69]
Two experimental, unofficial solutions are available for DOS. The loadable USBEXFAT driver requires Panasonic's USB stack for DOS and only works with USB storage devices; the open-source EXFAT executable is an exFAT file-system reader and requires the HX DOS extender to work.[73] There are no native exFAT real-mode DOS drivers, which would allow usage of, or booting from, exFAT volumes.
You will have to build it yourself, exfat-nofuse depends on BUILD_PATENTED, which is not enabled in official builds. An alternative would be formatting your USB flash drive with a different, supported, filesystem.
The current exfat package (driver) is a bit dated and it's more or less superseded by sdfat instead (it still reads exfat) however I haven't been able to make it identify itself as exfat which confuses block-mount. 589ccfa754
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