Any chance of UBI support on AC68?

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slice1900
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PostPosted: Mon Jun 23, 2025 20:47    Post subject: Any chance of UBI support on AC68? Reply with quote
I have five AC68U (TMobile TM-AC1900) I use for various purposes. JFFS2 does not work on any of them. They are OK for a bit but before long you get ECC errors, then the filesystem becomes unreadable and it is reformatted on the next reboot.

I noticed that UBI is supported on some routers like R7800 where it is known that JFFS2 doesn't work. Any chance of adding UBI to the AC68U builds?
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Per Yngve Berg
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PostPosted: Wed Jun 25, 2025 13:27    Post subject: Reply with quote
Label a volume as JFFS on a Memory Stick shall work. Do not Enable JFFS in the GUI.
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slice1900
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PostPosted: Thu Jun 26, 2025 0:25    Post subject: Reply with quote
Per Yngve Berg wrote:
Label a volume as JFFS on a Memory Stick shall work. Do not Enable JFFS in the GUI.


Yes that's a workaround but that workaround was also available for R7800 but UBI support was added to its kernel to support use of the built in NAND. I'm asking whether that can be done for AC68U also.
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BrainSlayer
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PostPosted: Thu Jun 26, 2025 1:26    Post subject: Re: Any chance of UBI support on AC68? Reply with quote
slice1900 wrote:
I have five AC68U (TMobile TM-AC1900) I use for various purposes. JFFS2 does not work on any of them. They are OK for a bit but before long you get ECC errors, then the filesystem becomes unreadable and it is reformatted on the next reboot.

I noticed that UBI is supported on some routers like R7800 where it is known that JFFS2 doesn't work. Any chance of adding UBI to the AC68U builds?


your comment with jffs2 is bullshit. the broadcom nand works a little bit more different than you think. the controller is some kind if special and handles error correction by itself. no benefit from ubi. just more poor compression than our jffs2 variant with lzma
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