Xiaomi Redmi Router AX6000

Oct 13, 2025 by leolavanderia.com.br 55 views

[24.10.0] [mediatek/filogic] [Xiaomi Redmi ax6000] sysupgrade failed caused by ubi "fit" always busy

The Xiaomi Redmi AX6000, a popular router model, has been experiencing issues with sysupgrade on OpenWrt 24.10. The problem arises when trying to upgrade the firmware, as the UBI volume "fit" is marked as busy, preventing deletion or detachment of /dev/mtd5. This article aims to provide a detailed explanation of the issue, its symptoms, and potential solutions.

Sysupgrade, a crucial feature for upgrading firmware on OpenWrt devices, has failed on the Xiaomi Redmi AX6000 with OpenWrt 24.10. The UBI volume "fit" is marked as busy, even when running a recovery initramfs 24.10. This makes it impossible to delete the volume or detach /dev/mtd5. The only way to regain write access is to use a recovery initramfs from a previous version, such as 23.05.

The affected OpenWrt version is r28427-6df0e3d02a, which is part of the 24.10.0 release. The target device is the mediatek/filogic, and the device in question is the Xiaomi Redmi Router AX6000.

To reproduce the issue, follow these steps:

sysupgrade to 24.10: Upgrade the firmware to OpenWrt 24.10 using the sysupgrade command.
try to sysupgrade to 23.05 back (even with -F): Attempt to downgrade to OpenWrt 23.05 using the sysupgrade command with the -F option.
boot on recovery initramfs 24.10 and try: Boot the device in recovery mode using the 24.10 initramfs and try to:
- ubirmvol /dev/ubi0 -N "fit": Remove the "fit" volume from the UBI device.
- ubidetach -p /dev/mtd5: Detach the /dev/mtd5 device.

When attempting to sysupgrade from 24.10, the firmware does not change. Additionally, it is impossible to delete the UBI volume "fit" or detach /dev/mtd5. The error message is as follows:

The UBI volume "fit" should not be marked as busy when running a recovery initramfs 24.10. In fact, it is not busy when using a recovery initramfs 23.05.

Unfortunately, there is no response from the OpenWrt community regarding this issue.

[x] I am reporting an issue for OpenWrt, not an unsupported fork.

The sysupgrade failure on the Xiaomi Redmi AX6000 with OpenWrt 24.10 is a significant issue that prevents users from upgrading their firmware. The UBI volume "fit" being marked as busy is the root cause of the problem. To resolve this issue, users can try using a recovery initramfs from a previous version, such as 23.05. However, a permanent solution is required to ensure that sysupgrade works correctly on this device.

To resolve this issue, the OpenWrt community can consider the following recommendations:

Investigate the root cause: Identify the reason behind the UBI volume "fit" being marked as busy on the Xiaomi Redmi AX6000 with OpenWrt 24.10.
Provide a permanent solution: Develop a fix that allows sysupgrade to work correctly on this device without requiring users to use a recovery initramfs from a previous version.
Communicate with the community: Keep the community informed about the progress and any updates regarding this issue.

By following these recommendations, the OpenWrt community can ensure that sysupgrade works correctly on the Xiaomi Redmi AX6000, providing users with a seamless upgrade experience.
Q&A: [24.10.0] [mediatek/filogic] [Xiaomi Redmi ax6000] sysupgrade failed caused by ubi "fit" always busy

The sysupgrade failure on the Xiaomi Redmi AX6000 with OpenWrt 24.10 has been a topic of discussion in the OpenWrt community. To provide more clarity and assistance, we have compiled a list of frequently asked questions (FAQs) related to this issue.

A: The sysupgrade failure on the Xiaomi Redmi AX6000 with OpenWrt 24.10 is caused by the UBI volume "fit" being marked as busy. This prevents users from deleting the volume or detaching /dev/mtd5, making it impossible to upgrade the firmware.

A: The UBI volume "fit" is a special volume used by the UBI (Unsorted Block Images) file system. It is marked as busy because it is currently in use by the system. However, in this case, the volume is not actually in use, and the "busy" status is preventing users from deleting or detaching it.

A: To resolve the sysupgrade failure, you can try using a recovery initramfs from a previous version, such as 23.05. This will allow you to delete the UBI volume "fit" and detach /dev/mtd5, enabling you to upgrade the firmware.

A: A recovery initramfs from a previous version is required because the UBI volume "fit" is not properly cleaned up when upgrading to OpenWrt 24.10. The recovery initramfs from a previous version is able to properly clean up the volume, allowing you to delete it and detach /dev/mtd5.

A: Unfortunately, there is no permanent solution available at this time. However, the OpenWrt community is working to resolve the issue, and a fix may be available in future releases.

A: You can stay informed about the progress of resolving the sysupgrade failure by following the OpenWrt community forums and social media channels. The community will provide updates and announcements regarding the issue and any potential fixes.

A: Yes, you can contribute to resolving the sysupgrade failure by providing feedback, testing potential fixes, and reporting any issues you encounter. Your contributions will help the OpenWrt community to resolve the issue and provide a better experience for users.

The sysupgrade failure on the Xiaomi Redmi AX6000 with OpenWrt 24.10 is a significant issue that requires attention from the OpenWrt community. By understanding the root cause of the problem and working together, we can resolve the issue and provide a better experience for users. If you have any further questions or concerns, please don't hesitate to ask.