NVMe power issue? - Printable Version +- PINE64 (https://forum.pine64.org) +-- Forum: Pinebook Pro (https://forum.pine64.org/forumdisplay.php?fid=111) +--- Forum: Pinebook Pro Hardware and Accessories (https://forum.pine64.org/forumdisplay.php?fid=116) +--- Thread: NVMe power issue? (/showthread.php?tid=8405) Pages:
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RE: NVMe power issue? - tsys - 12-19-2019 (12-18-2019, 04:01 PM)hmuller Wrote: @tsys , Oh wow, thanks for the extensive testing! I didn't got through that lengths to ensure it does actually fit since I do have all the equipment to just build and try it once the PCBs arrive. I don't think this is a solution many people will implement though. When shooting for something that is less janky one should probably just add a step-up to the M.2 adapter board. RE: NVMe power issue? - Arwen - 12-19-2019 (12-19-2019, 08:22 AM)tsys Wrote: ...Yes, please . Knowing what we know now, we should be able to include multiple fixes. For example, since the M.2 adapter board has a M.2 connector that sticks up, perhaps we should re-design it facing down. Then use a nylon standoff for the other end. Sometimes looking at a problem fresh may come up with a better solution. Of course, I've not had a need to open my Pinebook Pro yet... so maybe mounting it upside down is un-workable. After my ANSI PBP comes, I will feel more inclined to open up my ISO PBP. RE: NVMe power issue? - belfastraven - 12-24-2019 (11-22-2019, 11:50 AM)hmuller Wrote:FYIW I am running with MyDigitalSSD SBXe 480 as my file system, with boot on the emmc. (I used a hacksaw to "improve" the adapter) The drive seems to have average performance accoding to my initial phoronix disk benchmark testing.(11-21-2019, 07:49 PM)tsys Wrote: I'm in general somewhat puzzled about how the Pinebook Pro is supposed to stay operational when the battery is low. The discharge cutoff voltage of the battery is specified as 2.75 V. However U3 is just a step-down regulator. Thus it won't be able to maintain VCC3V3_SYS at 3.3 V once the battery discharges below 3.3 V. I am able to boot the system with battery at 4%--I haven't tried with it any lower, since I normally would have the machine shutdown at 5%. I have a rockpro64 on which I am playing with mainline u-boot with TSYS's atf patch (boot on SD or emmc, file system on Samsung 981) I'd love to get that going on this device, too, even if it can't yet boot the nvme directly, since the system seems to boot more quickly. RE: NVMe power issue? - hmuller - 12-25-2019 (12-24-2019, 01:27 PM)belfastraven Wrote: FYIW I am running with MyDigitalSSD SBXe 480 as my file system, with boot on the emmc. (I used a hacksaw to "improve" the adapter) The drive seems to have average performance accoding to my initial phoronix disk benchmark testing. That's great to 'hear'! @zaius will be happy to add that to his SSD data. Once they send out the corrected adapters I look forward to installing it. RE: NVMe power issue? - as400 - 12-26-2019 It looks to me like there are problems with NVMe disks that are heavily cached with DRAM memory which uses a lot of power. MyDigitalSSD SBXe doesn't have any form of DRAM cache onboard. Maybe this is the cause that it just works ? There are also reports that such disks albeit slower are running much cooler. Power consumption test: https://www.legitreviews.com/mydigitalssd-sbx-512gb-nvme-ssd-review_206201/7 RE: NVMe power issue? - belfastraven - 12-26-2019 (12-26-2019, 09:41 AM)as400 Wrote: It looks to me like there are problems with NVMe disks that are heavily cached with DRAM memory which uses a lot of power.ssp Yes, and the new SBX eco's are supposed to improve on power consumtion over the earlier disks , I believe. I have run iozone tests and not seen temps over 37 degrees C. The warmest I have seen the disk as measured by smartctl -a is 40 deg. at the end of a kernel compilation with -j6 and all cores maxed out. I had been looking for relatively inexpensive storage that would iit inside the machine and allow for decent battery life. So far this is working. RE: NVMe power issue? - zaius - 12-26-2019 (12-25-2019, 08:04 PM)hmuller Wrote: That's great to 'hear'! @zaius will be happy to add that to his SSD data. Once they send out the corrected adapters I look forward to installing it. OK I'll go look it up and add it to the thread. It looks like the 240GB is only $33 on Amazon. Although the description says it's 2280, the comments say it's 42mm. How long is it? https://www.amazon.com/MyDigitalSSD-480GB-Single-2280-S3-B-Express/dp/B07Q758SVN (12-26-2019, 09:41 AM)as400 Wrote: It looks to me like there are problems with NVMe disks that are heavily cached with DRAM memory which uses a lot of power. Yes, less power consumed, less heat produced. RE: NVMe power issue? - tophneal - 12-26-2019 (12-26-2019, 01:34 PM)zaius Wrote:I ordered the 480 last night, I can let you know if I get the 2280 as shown on the page, or the 2242 the title and comments mention. Should have it Monday or Tuesday.(12-25-2019, 08:04 PM)hmuller Wrote: That's great to 'hear'! @zaius will be happy to add that to his SSD data. Once they send out the corrected adapters I look forward to installing it. |