Pinebook Pro 'xtreme'
#56
(11-25-2020, 02:03 PM)Arwen Wrote: I've been looking at adding 2 "features" to my Pinebook Pro. One applies to your comment about power & internal SSD, (aka NVMe drive). It appears that the eMMC is a pretty low power device, about 1 watt. Instead of adding a 4 watt, (or higher), NVMe SSD, what about adding another 1 or 2 eMMC slots? Make a new PCIe adapter board with a single or dual eMMC controller chip and 1, (or 2), eMMC slots, and then you can add 128GB, (or 2 x 128GB), eMMCs.
That wouldn't really work.  You'd need a specific ASIC that did PCI-e NVMe to eMMC translation in order to interface the eMMC to something that had a driver.  Or maybe use one of the Synopsis IP cores for an sdio controller and adapt it to PCI-e.  But I don't know of such a chip on the market.  If you used an FPGA then your power usage is shot all to hell right there before you even start with the flash.

But suppose such a thing existed.  So you have something that connects to PCI-e and looks like a NVMe or other storage device, then translates that control into block requests that it sends out through a non-trivial HS200 bus to an eMMC chip, which in turn does the FTL and translates block requests into actual actions on NAND flash banks.  We go from NVMe PCI-e TLPs on one end to NAND flash page and block ops on the other end.  With a bunch of stuff in the middle.

Now consider a normal NVMe SSD.  It goes from NVMe PCI-e TLPs on one end to NAND flash page and block ops on the other end.  Exactly the same.  But it uses a single NVMe flash controller, e.g. a Phison chip, to do this.  It avoids the middle step of converting to/from a HS200 bus.  Avoids putting the PCI-e interface and the FTL in two different chips.  And the flash controller is a high volume part that has had a lot of work put into it and uses a good fab process, to make it fast and cheap.

So really all this will have done is make an expensive and inefficient SSD.  If it seems like a NVMe SSD draws more power, maybe this is because one is comparing a 1 GB SSD that can do 3500 MB/sec to a 128 MB eMMC chip that does 60 MB/sec.

The solution is to use a small SSD and configure it to run at the lowest operational power state.


Messages In This Thread
Pinebook Pro 'xtreme' - by bcnaz - 11-26-2019, 12:43 PM
RE: Pinebook Pro 'xtreme' - by GLSRacer - 11-26-2019, 12:50 PM
RE: Pinebook Pro 'xtreme' - by bcnaz - 11-26-2019, 01:16 PM
RE: Pinebook Pro 'xtreme' - by GLSRacer - 11-26-2019, 01:19 PM
RE: Pinebook Pro 'xtreme' - by bcnaz - 11-26-2019, 01:20 PM
RE: Pinebook Pro 'xtreme' - by Luke - 11-26-2019, 05:19 PM
RE: Pinebook Pro 'xtreme' - by bcnaz - 11-26-2019, 05:22 PM
RE: Pinebook Pro 'xtreme' - by Arwen - 11-26-2019, 11:45 PM
RE: Pinebook Pro 'xtreme' - by Arglebargle - 11-27-2019, 01:40 AM
RE: Pinebook Pro 'xtreme' - by as400 - 11-27-2019, 02:06 AM
RE: Pinebook Pro 'xtreme' - by PakoSt - 11-27-2019, 03:40 AM
RE: Pinebook Pro 'xtreme' - by inkslinger - 11-27-2019, 10:07 AM
RE: Pinebook Pro 'xtreme' - by Arwen - 11-27-2019, 11:39 AM
RE: Pinebook Pro 'xtreme' - by brent.thierens - 11-28-2019, 01:28 AM
RE: Pinebook Pro 'xtreme' - by oxoocoffee - 08-16-2020, 10:11 AM
RE: Pinebook Pro 'xtreme' - by Arwen - 08-16-2020, 02:52 PM
RE: Pinebook Pro 'xtreme' - by oxoocoffee - 11-25-2020, 12:59 PM
RE: Pinebook Pro 'xtreme' - by bcnaz - 11-27-2019, 12:25 PM
RE: Pinebook Pro 'xtreme' - by PakoSt - 11-28-2019, 02:16 AM
RE: Pinebook Pro 'xtreme' - by Arwen - 11-28-2019, 01:49 PM
RE: Pinebook Pro 'xtreme' - by Kochise - 11-28-2019, 03:52 AM
RE: Pinebook Pro 'xtreme' - by pfeerick - 11-28-2019, 04:28 AM
RE: Pinebook Pro 'xtreme' - by tllim - 12-01-2019, 12:36 PM
RE: Pinebook Pro 'xtreme' - by Luke - 11-28-2019, 02:19 PM
RE: Pinebook Pro 'xtreme' - by Arwen - 12-01-2019, 01:31 PM
RE: Pinebook Pro 'xtreme' - by Kochise - 12-01-2019, 02:39 PM
RE: Pinebook Pro 'xtreme' - by brent.thierens - 12-04-2019, 01:34 AM
RE: Pinebook Pro 'xtreme' - by Luke - 12-04-2019, 04:10 AM
RE: Pinebook Pro 'xtreme' - by as400 - 12-04-2019, 06:30 AM
RE: Pinebook Pro 'xtreme' - by Luke - 12-04-2019, 09:46 AM
RE: Pinebook Pro 'xtreme' - by undo - 12-11-2019, 03:55 AM
RE: Pinebook Pro 'xtreme' - by brent.thierens - 12-04-2019, 02:12 PM
RE: Pinebook Pro 'xtreme' - by fpex73 - 12-05-2019, 08:33 AM
RE: Pinebook Pro 'xtreme' - by cartoonworld - 12-05-2019, 11:40 AM
RE: Pinebook Pro 'xtreme' - by moonwalkers - 07-16-2020, 10:48 PM
RE: Pinebook Pro 'xtreme' - by brent.thierens - 12-05-2019, 12:33 PM
RE: Pinebook Pro 'xtreme' - by Arwen - 12-11-2019, 06:14 AM
RE: Pinebook Pro 'xtreme' - by CrystalGamma - 01-01-2020, 05:11 PM
RE: Pinebook Pro 'xtreme' - by Arwen - 01-01-2020, 08:13 PM
RE: Pinebook Pro 'xtreme' - by karr0n - 01-01-2020, 08:21 PM
RE: Pinebook Pro 'xtreme' - by bcnaz - 01-01-2020, 08:39 PM
RE: Pinebook Pro 'xtreme' - by Arwen - 01-02-2020, 05:39 AM
RE: Pinebook Pro 'xtreme' - by Kochise - 01-03-2020, 05:34 AM
RE: Pinebook Pro 'xtreme' - by xmixahlx - 01-03-2020, 11:44 PM
RE: Pinebook Pro 'xtreme' - by bcnaz - 01-04-2020, 12:03 AM
RE: Pinebook Pro 'xtreme' - by xmixahlx - 01-04-2020, 10:14 PM
RE: Pinebook Pro 'xtreme' - by xmixahlx - 07-16-2020, 11:55 AM
RE: Pinebook Pro 'xtreme' - by WZ9V - 08-09-2020, 07:16 PM
RE: Pinebook Pro 'xtreme' - by bcnaz - 08-09-2020, 07:28 PM
RE: Pinebook Pro 'xtreme' - by Arwen - 08-09-2020, 08:58 PM
RE: Pinebook Pro 'xtreme' - by Arwen - 08-11-2020, 09:38 PM
RE: Pinebook Pro 'xtreme' - by ambulant - 08-16-2020, 07:13 AM
RE: Pinebook Pro 'xtreme' - by Arwen - 11-25-2020, 02:03 PM
RE: Pinebook Pro 'xtreme' - by xyzzy - 11-25-2020, 03:44 PM
RE: Pinebook Pro 'xtreme' - by nightranger73 - 11-26-2020, 12:45 AM
RE: Pinebook Pro 'xtreme' - by Arwen - 11-26-2020, 05:37 PM
RE: Pinebook Pro 'xtreme' - by xyzzy - 11-27-2020, 01:25 AM
RE: Pinebook Pro 'xtreme' - by jiyong - 11-27-2020, 04:35 AM
RE: Pinebook Pro 'xtreme' - by Arwen - 11-27-2020, 12:45 PM

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