Leaf15
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Re: IEVS: UPDATE: Tesla Cars Have A Memory Problem That May Cost You A Lot To Repair

Thu Oct 17, 2019 7:36 am

jlv wrote:
Thu Oct 17, 2019 6:23 am
LeftieBiker wrote:
Wed Oct 16, 2019 2:02 pm
I expect that Tesla-oriented aftermarket shops will start offering to just replace the flash memory chip for half the $1800 price or less. The chip itself is probably worth about $50.
The shop near me (Electrified Garage) roots the car and lowers the logging level to reduce the number of writes. They also replace the part for much less than that.
They replace it, but with used one from salvaged one, so the issue would come back.
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DaveinOlyWA
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Re: IEVS: UPDATE: Tesla Cars Have A Memory Problem That May Cost You A Lot To Repair

Thu Oct 17, 2019 9:09 am

LeftieBiker wrote:
Wed Oct 16, 2019 2:02 pm
I expect that Tesla-oriented aftermarket shops will start offering to just replace the flash memory chip for half the $1800 price or less. The chip itself is probably worth about $50.
16 GB? Maybe $5. Probably less. The chip isn't the problem. Its the fact its soldered to the board.
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jlv
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Re: IEVS: UPDATE: Tesla Cars Have A Memory Problem That May Cost You A Lot To Repair

Thu Oct 17, 2019 9:48 am

Leaf15 wrote:
Thu Oct 17, 2019 7:36 am
They replace it, but with used one from salvaged one, so the issue would come back.
When I spoke to Chris (the owner there), he told me they turn the Linux logging off, which avoids the problem.
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jlv
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Re: IEVS: UPDATE: Tesla Cars Have A Memory Problem That May Cost You A Lot To Repair

Thu Oct 17, 2019 9:58 am

Rich Rebuilds talked about this back in May: https://youtu.be/o-7b1waoj9Q?t=521
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mwalsh
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Re: IEVS: UPDATE: Tesla Cars Have A Memory Problem That May Cost You A Lot To Repair

Thu Oct 17, 2019 12:41 pm

cwerdna wrote:
Thu Oct 17, 2019 1:04 am

I've switched over to a newer PC I built in mid-2018 w/a different SSD (Samsung 960 Evo 500 GIG). 8.9 TB has been written to it so far. Per https://www.samsung.com/semiconductor/m ... er/960evo/, they warrant it for 3 years or 200 TBW. Per https://www.anandtech.com/show/10833/th ... 1tb-review, it's TLC. This PC will likely be retired before the drive hits 200 TB of writes.
I've been sticking 500GB 860 EVO V-NANDs into our laptops for a while now, and everyone loves the performance upgrade over mechanical drives, especially when I also take them from 8GB to 16GB DIMM memory and configure Windows to use a user defined (large) amount of VM instead of automatically adjusted. Most people say it's like they got a new machine!

Warranty on the 500GB 860 EVO V-NAND is 5 years or 300TBW. IMHO, they can't be beat for just $80 with tax.

We predominantly use 2016-2017 model Dell Latitude E5470s for field guys and lower-level office people, on account of almost every desk having a legacy docking station that it would be too costly to replace. And with the E5470 being the last laptop Dell made with a compatible connector, keeping these babies humming and having people be happy with continuing to use them is a real high priority for me!
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lorenfb
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Re: IEVS: UPDATE: Tesla Cars Have A Memory Problem That May Cost You A Lot To Repair

Thu Oct 17, 2019 4:05 pm

“The main issue is that this excessive log file writing causes eMMC flash wear. Flash memory is generally only rated for some tens of thousands of write cycles. What happens is that the flash memory starts to fail when writings can no longer be completed. When one block fails, parts of the firmware may also become unreadable, leading to poor operation or failure of the MCU completely.”
https://insideevs.com/news/376037/tesla ... ory-issue/

Some have inferred that Tesla systems designs are leading edge. Really?

Why would a systems designer utilize the same non-volatile memory (flash) chip for both critical system settings, i.e. key firmware of
operational parameters, and basic logging functions requiring very frequent memory writes? The MCU system should have had two separate
flash memories. Surely the Tesla systems designers are aware of flash memory technical limitations, right? The other approach would
have been to write logging data to RAM and then write that data eventually to flash memory based on a much lower write frequency.
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cwerdna
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Re: IEVS: UPDATE: Tesla Cars Have A Memory Problem That May Cost You A Lot To Repair

Thu Oct 17, 2019 4:52 pm

And, to add some more data points re: SSDs, I've got Samsung 830 SATA SSDs in 2 laptops (not used much, will have to check the dates, but they were installed sometime before 2013) + 1 more in my dad's main machine (i5-2500 I put together for him in 2012). The all still work fine and he still uses that PC actively.

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LeftieBiker
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Re: IEVS: UPDATE: Tesla Cars Have A Memory Problem That May Cost You A Lot To Repair

Thu Oct 17, 2019 5:55 pm

I have an old 80 gig SSD sitting in a box that I never used - I'll bet it's in fine shape. ;) Maybe I'll put it in an enclosure and use it with my antenna box so I can "TiVo" live TV...see how long it lasts.
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SageBrush
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Re: IEVS: UPDATE: Tesla Cars Have A Memory Problem That May Cost You A Lot To Repair

Thu Oct 17, 2019 7:53 pm

lorenfb wrote:
Thu Oct 17, 2019 4:05 pm
Why would a systems designer utilize the same non-volatile memory (flash) chip for both critical system settings, i.e. key firmware of
operational parameters, and basic logging functions requiring very frequent memory writes? The MCU system should have had two separate
flash memories.
.
Surprise !
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TomT
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Re: IEVS: UPDATE: Tesla Cars Have A Memory Problem That May Cost You A Lot To Repair

Sat Oct 19, 2019 11:50 am

Remember that these are early cars with different technology and software than what is currently being used... Bleeding edge and all that.
lorenfb wrote:
Thu Oct 17, 2019 4:05 pm
Why would a systems designer utilize the same non-volatile memory (flash) chip for both critical system settings
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