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Compute Module • Re: CM4 eMMC wear leveling

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Is the eMMC more durable than normal SD card? I found industrial eMMC with SLC flash but their price is higher than total price of CM4.
What eMMC you get with the Compute Modules is not listed in the datasheet, which is a risk, as it means that there are no guarantees about what you get. It could change at some point.

But I do know that the couple I have, have pretty reasonable eMMC.
They can be reprogrammed to act as SLC, sticking only 1 bit in a cell. (using 'mmctool' manually or by selecting the "format as pSLC" pre-install script with cmprovision).

If you do so, you do will permanently lose half the capacity.
Which is also a good indication it was MLC with 2 bits in a cell at the start.
While your typical SD card sticks more bits in a cell, so is less reliable.

Statistics: Posted by incognitum — Sun Jun 16, 2024 11:24 am



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