Why are eMMC modules device specific?

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HisDudeness
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Why are eMMC modules device specific?

Post by HisDudeness » Thu Jun 18, 2020 1:21 am

Hi there! I'm sure the question has already been answered, but I wasn't able to find it. Also, I didn't find a memory-specific section, please feel free to move this topic where more appropriate.

The question is in the title, and it is more of a confirmation, really. The eMMCs come with an OS pre-installed (Linux - which is Ubuntu if I'm not mistaken - or Android), so I'm guessing the difference between a C4 eMMC and an N2 one is just in the fact that the OS that they come with is the version suited for the respective device. That means I could later use an XU4 eMMC on an H2 if I flash it, and if I mean to use my OS of choice and then flash the memory to start with, I can just buy several C2 memories, am I right? Are there any hardware differences in the memories at all?
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Re: Why are eMMC modules device specific?

Post by cdu13a » Thu Jun 18, 2020 1:44 am

If the PCB of the eMMC module is the same colour then the module is identical to another with the same colour PCB.(PCB colour not to be confused with sticker colour) As you suspect the difference is just the pre installed OS, and the configuration that is specific to that device. I have several eMMC modules that I originally got for use with a C2 or XU4 that I now use with the N2 and C4. if you have the eMMC module writer, you can flash any OS image you want on any of the eMMC irregardless of what was originally on the module.

more info about the eMMC modules can be found here https://wiki.odroid.com/accessory/emmc/emmc
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HisDudeness (Thu Jun 18, 2020 3:12 am)

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Re: Why are eMMC modules device specific?

Post by mad_ady » Thu Jun 18, 2020 2:24 am

The black emmcs are not bootable on xu4 and don't work on the emmc2usb adapter. Red and orange are fine on all boards.
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HisDudeness (Thu Jun 18, 2020 3:13 am)

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Are 128GB eMMCs gone for good?

Post by HisDudeness » Thu Jun 18, 2020 3:11 am

Thank you both. Does anybody know why are the 128GB ones listed among the obsolete products? Is there any reason they won't be producing those again, if that is the case?
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Re: Why are eMMC modules device specific?

Post by mad_ady » Thu Jun 18, 2020 3:44 am

Odroid said 128G chips were hard to obtain from manufacturers.
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HisDudeness (Thu Jun 18, 2020 12:27 pm)

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Re: Why are eMMC modules device specific?

Post by joerg » Thu Jun 18, 2020 3:46 am

@odroid stated in another thread:
But Samsung doesn't produce the 128GB eMMC chipset any more and we've not sold the 128GB eMMC module from early this year.
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HisDudeness (Thu Jun 18, 2020 12:27 pm)

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Post by HisDudeness » Thu Jun 18, 2020 12:27 pm

Bummer. Thank you all for the explanations, guess 64GB will be enough.
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Re: Why are eMMC modules device specific?

Post by L67GS » Thu Jun 18, 2020 11:57 pm

I got two 128gb eMMC modules from Ameridroid in the last couple of months.
I'm already preparing to buy a couple of C0's before they retire, I suppose I should add these to the list.
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Ameridroid (Fri Jun 19, 2020 2:26 am)

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Re: Why are eMMC modules device specific?

Post by Ameridroid » Fri Jun 19, 2020 2:26 am

We've recently sold out of the remaining stock of 128GB eMMCs we have as well.

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Re: Why are eMMC modules device specific?

Post by L67GS » Fri Jun 19, 2020 7:27 am

Ameridroid wrote:
Fri Jun 19, 2020 2:26 am
We've recently sold out of the remaining stock of 128GB eMMCs we have as well.
Poop! I wish I'd payed more attention to that while it was relevant. I'll be ordering a couple C0's with connector kits and heatsinks before they become a footnote in history as well.

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