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A comment on Flash Memory Wear Killing Older Teslas Due to Excessive Data Logging: Report.

Re:Flash Memory Wear Killing Older Teslas Due to Excessive D... by michaelt on Tuesday October 15, 2019 @09:49AM (#21258299)
> The Tesla firmware wasn't very big at the beginning, [...] the firmware has grown, leaving very little room for the logging to take place. That means individual sectors suffer from lots of data being written in a short amount of time, further accelerating the wear.

My understanding was modern flash memory wear levelling would swap regularly-written and seldom-written sectors around, allowing for even wear across the disk even if it was 95% full all the time. Is it established that Tesla doesn't have this feature?

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Re:Flash Memory Wear Killing Older Teslas Due to Excessive D... by codeulike on Tuesday October 15, 2019 @09:57AM (#21258370)
It does, but the article says that the car logs a lot of data and so consequently all sectors get wear. See here: https://insideevs.com/news/376037/tesla-mcu-emmc-memory-issu...
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Re:Flash Memory Wear Killing Older Teslas Due to Excessive D... by planteen on Tuesday October 15, 2019 @09:57AM (#21258368)
I'm not sure exactly what eMMC part they are using, but the SDHC spec doesn't explicitly require wear leveling. A part could implement it, but it's not a given.
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Re:Flash Memory Wear Killing Older Teslas Due to Excessive D... by rcxdude on Tuesday October 15, 2019 @01:34PM (#21261234)
While I might expect an SSD to use such a strategy, an embedded flash chip doing so is just as likely to be a misfeature, because when the flash does fail you may lose data other than that already being written, which makes it impossible to keep the system even limping along without any logging.
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Re:Flash Memory Wear Killing Older Teslas Due to Excessive D... by oarsinsync on Tuesday October 15, 2019 @10:03AM (#21258421)
It's also possible that older Tesla vehicles do not have modern flash memory.
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Re:Flash Memory Wear Killing Older Teslas Due to Excessive D... by benj111 on Tuesday October 15, 2019 @01:04PM (#21260824)
That would be bad for this use case?

I want the firmware working, I don't much care if data logging stops working.

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