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benefits of eMMC?
SirSkorpan
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#1
Question  10-01-2018, 02:20 PM
I'm considering buying a RockPro64 to use as a NAS and general server, I saw that one could buy eMMC modules to use as internal memory for the board. I have a few questions here:
  • What is the benefit of using eMMC rather than SD card? Speed, longer lifetime or the storage?
  • How is the eMMC module attached to the board? I couldn't identify an obvious slot or similar connection.
  • What is the purpose of the USB adapter, is it to "burn" the OS image to the eMMC or do you need it to attach the eMMC to the board?
dukla2000
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#2
10-01-2018, 03:32 PM
(10-01-2018, 02:20 PM)SirSkorpan Wrote:
  • What is the benefit of using eMMC rather than SD card? Speed, longer lifetime or the storage?
Yes, Yes & not really - 64GB on eMMC is trivially smaller than 64GB on SD card due to storage reserved for error allocation.

(10-01-2018, 02:20 PM)SirSkorpan Wrote:
  • How is the eMMC module attached to the board? I couldn't identify an obvious slot or similar connection.
See item 14.

(10-01-2018, 02:20 PM)SirSkorpan Wrote:
  • What is the purpose of the USB adapter, is it to "burn" the OS image to the eMMC or do you need it to attach the eMMC to the board?
To burn the image to the eMMC. (It does simplify things but it is not essential.)
  • ROCKPro64 v2.1 2GB, 16Gb eMMC for rootfs, SX8200Pro 512GB NVMe for /home, HDMI video & sound, Bluetooth keyboard & mouse. Arch (6.2 kernel, Openbox desktop) for general purpose daily PC.
  • PinePhone Pro Explorer Edition, daily driver, rk2aw & U-boot on SPI, Arch/SXMO & Arch/phosh on eMMC
  • PinePhone BraveHeart now v1.2b 3/32Gb, Tow-boot with Arch/SXMO on eMMC
SirSkorpan
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#3
10-01-2018, 04:13 PM (This post was last modified: 10-02-2018, 01:50 AM by Luke.)
Thanks a lot for the answer!

There seems to be something wrong with the wiki, I'm redirected to the store when I try to click the link, but I think I found a low res picture of the board layout.

Is it this one? So to the right (in this picture) of the PCIe slot? (It does look very much like the end of the USB adapter, maybe I should have seen that  Rolleyes
romtorwator
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#4
10-01-2018, 09:54 PM
high res picture
_____________________________________________________________________________________________________________________________________________
my SOHO NAS RockPro64 4GB v2.1 / eMMC 32GB / PCIe -> 4*SATA Marvell 88SE9235 / SD-card 64 GB / NAS Casing / image Debian Stretch Minimal / Kernel 4.4.xxx ayufan
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SirSkorpan
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#5
10-02-2018, 01:24 AM
Still seems that there is something wrong with the links to the wiki, I keep being redirected to the shop, but I think I understand how it looks.

Sorry about the weird image-tag it seems I got the image data instead of the link. Apparently one cannot edit one's posts, hopefully some moderator can remove the tag Sad
Luke
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#6
10-02-2018, 01:51 AM
(10-02-2018, 01:24 AM)SirSkorpan Wrote: Still seems that there is something wrong with the links to the wiki, I keep being redirected to the shop, but I think I understand how it looks.

Sorry about the weird image-tag it seems I got the image data instead of the link. Apparently one cannot edit one's posts, hopefully some moderator can remove the tag Sad

Done. Thanks for prompting us Smile
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