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by chwe
Sat Dec 29, 2018 2:28 am
Forum: General discussion
Topic: Rpi with onboard EMMC storage
Replies: 105
Views: 9914

Re: Rpi with onboard EMMC storage

I don't argue pro eMMC.. :D there are scenarios where it makes sense.. there are others where it doesn't make sense.. but arguing that eMMC makes a board 'brickable' just shows that those people don't follow what happens in SBC world besides RPis. More or less all recent designs in those days have e...
by chwe
Fri Dec 28, 2018 11:19 pm
Forum: General discussion
Topic: How remove the lightning bulb
Replies: 29
Views: 17995

Re: How remove the lightning bulb

How are you updating? apt-get (recommended) or rpi-update (here be dragons!)? Any idea of the fw/kernel version when it started? There was a change (1 March) to allow control of the power LED from Linux, but apart from potentially a blip during boot, that shouldn't change the behaviour. why do you ...
by chwe
Fri Dec 28, 2018 10:38 pm
Forum: General discussion
Topic: Rpi with onboard EMMC storage
Replies: 105
Views: 9914

Re: Rpi with onboard EMMC storage

EMMC storage is very expensive compared to an SD-card, that is why a compute module has a strictly limited amount of it. so expensive that even a 20$ SBC from other boardmakers can deliver 8GB of it.. :lol: [/sarcasm] Also simply relying on it would make the PI "brickable". as the trend goes for al...
by chwe
Fri Dec 21, 2018 3:58 pm
Forum: General discussion
Topic: 64-bit operating system
Replies: 358
Views: 142385

Re: 64-bit operating system

I was under the impression Armbian was released because many SBC's could not natively run Debian ARMHF or ARM64 ?? we* don't compile debs which you can download from official debian/ubuntu repos.. ;) With the 64bit SoCs currently supported by Armbian we deliver ARM64 userspace and for the others ar...
by chwe
Fri Dec 21, 2018 2:14 pm
Forum: General discussion
Topic: A warning about the new ELUTENG USB-SATA adapter. (for use with P3B)
Replies: 30
Views: 8952

Re: A warning about the new ELUTENG USB-SATA adapter.

It's not a power issue. I have a good PSU and I was testing with a modern, power efficient SSD (several of them). The chipset is not entirely at fault either. It's a complex interaction between the chipset, drive and firmware. The older Eluteng adapter used the ASMedia chipset, and it worked with e...
by chwe
Tue Dec 18, 2018 9:41 pm
Forum: General discussion
Topic: A warning about the new ELUTENG USB-SATA adapter. (for use with P3B)
Replies: 30
Views: 8952

Re: A warning about the new ELUTENG USB-SATA adapter.

can you be sure that it isn't a powering issue? maybe the powering wires are a bit thinner ends in a voltage drop which is just big enough to shutdown your HDDs? 2.5'' HDDs can be powerhungry and with an microUSB powered SBC (like the Pi) you can be quite near to acceptable limits.. IMO known good U...
by chwe
Tue Dec 18, 2018 9:13 pm
Forum: General discussion
Topic: Temperature sensor without breadbord
Replies: 16
Views: 7464

Re: Temperature sensor without breadbord

ds18b20 also works without issues on 3.3V.. not sure if the GPIO on which you read the datapin likes it if the sensors VCC is 5V. :lol: The data pin on the DS18B20 is open collector output, so the Vcc on the sensor doesn't matter, just as long as the pull-up resistor for the data is connected to 3....
by chwe
Tue Dec 18, 2018 12:18 am
Forum: General discussion
Topic: swap file on usb -=problems&thoughts=-
Replies: 11
Views: 1201

Re: swap file on usb -=problems&thoughts=-

swap on usb disk might be a bad decision.. Swap needs to be on the fastest possible storage you have (especially in small blocks). All USB sticks I ever used performed badly when it comes to randomIO performance with small blocks (compared to good SD-cards - good means A1 rated cards). To be honest,...
by chwe
Tue Dec 18, 2018 12:05 am
Forum: General discussion
Topic: Temperature sensor without breadbord
Replies: 16
Views: 7464

Re: Temperature sensor without breadbord

You don't need a breadboard for that. You can get cabled DS18B20 very cheaply and just solder the pull-up resistor to 2 of the 3 wires (Data and +5v). The OP didn't say "no soldering" ;) It wont be truly "plug and play" without software configuration. Texy ds18b20 also works without issues on 3.3V....
by chwe
Mon Dec 17, 2018 11:49 pm
Forum: General discussion
Topic: Rpi 3B+ over Asus Tinker Board
Replies: 27
Views: 6105

Re: Rpi 3B+ over Asus Tinker Board

Where does the extra RAM help when you are using less than 128MB maximum? ... Where is a good reference on programming the tinkerboards GPU? How do you boot RISC OS on the tinkerboard? These are questions that when answered may make the tinkerboard worth half a look as a desktop computer. who reall...
by chwe
Mon Dec 10, 2018 11:37 pm
Forum: General discussion
Topic: Rpi 3B+ over Asus Tinker Board
Replies: 27
Views: 6105

Re: Rpi 3B+ over Asus Tinker Board

uuugh.. I probably get burned for this one but let's give it a try... :lol: RPi3 vs. tinker: Let's start with your questions and let's thes see which myths I see here and there.. Disclaimer: I own RPis and a tinker as well, my use-cases are mostly head-less scenarios where both, the Pi and the tinke...
by chwe
Thu Sep 20, 2018 7:56 pm
Forum: General discussion
Topic: Which Raspberry Pi Should I Buy
Replies: 27
Views: 4055

Re: Which Raspberry Pi Should I Buy

What was the figure quoted above ? 40 issues? Out of approximately 2 million 3B+ sold. Yes, that many. Not only that but some of those issues caused by people shorting out the Pi whilst powered up. So user error. The 3B+ is not overly delicate, unless you count a 0.002% failure rate as overly delic...
by chwe
Thu Sep 13, 2018 8:41 pm
Forum: General discussion
Topic: Raspberry Pi as NAS / private cloud
Replies: 8
Views: 2214

Re: Raspberry Pi as NAS / private cloud

Software DietPi distro MariaDB nginx webserver + php NextCloud Why not go for with a dedicated NAS distro like OMV (https://sourceforge.net/projects/openmediavault/files/Raspberry%20Pi%20images/)? IMO 2x 1TB SSD connected to USB2 sounds insane but if you want it, do it. Look briefly at powering oth...
by chwe
Thu Sep 13, 2018 2:15 pm
Forum: General discussion
Topic: High Endurance SD card
Replies: 47
Views: 26096

Re: High Endurance SD card

Where I live the price of a 120 GB SATA III SSD is about the same as a 128 GB SD card. Assuming the USB to SATA converter is not expensive, then cost is not a distinguishing factor between the two options. On the other hand, the SSD is heavier, so it's better not to send it up in a balloon. For the...
by chwe
Thu Sep 13, 2018 12:02 am
Forum: General discussion
Topic: High Endurance SD card
Replies: 47
Views: 26096

Re: High Endurance SD card

chwe, Interesting anecdote. Sadly there are contrary anecdotes of root file system corruption and SD card failure after random power downs and resets coming here all the time. Hence my read-only root suggestion for robust operation and piece of mind. Yes RAM is limited and that may impact what one ...
by chwe
Tue Sep 11, 2018 7:38 pm
Forum: General discussion
Topic: High Endurance SD card
Replies: 47
Views: 26096

Re: High Endurance SD card

If you really want to stop the file system you boot from to becoming corrupted in the face of random power outages and reboots you could make sure it is mounted as read-only. There are some nice instructions as to how to do that here: https://www.raspberrypi.org/forums/viewtopic.php?t=161416 well, ...
by chwe
Sun Sep 09, 2018 11:12 pm
Forum: General discussion
Topic: High Endurance SD card
Replies: 47
Views: 26096

Re: High Endurance SD card

"SDSQXCG-032G-GN6MA", might be best MicroSD card available and cost around 30€ (but RPi maybe doesn't support A1 standard, so might be same as earlier versions) A1 has nothing to do with some 'special mode'. There's DDR50 mode (what the RPi is capable of doing it) or UHS104 aka SDR104 mode (1.8V) w...
by chwe
Tue Aug 28, 2018 2:30 pm
Forum: General discussion
Topic: Is it really true, that the RPi runs faster when booting from a good USB Stick?
Replies: 31
Views: 10591

Re: Is it really true, that the RPi runs faster when booting from a good USB Stick?

and I think tools which are made for this purposes are even better. e.g. IOzone https://packages.debian.org/search?arch=armhf&keywords=iozone :P You are right, but english is not easy for me. And write details is very difficult. I think you know about synthetic and real tests. When I was make my te...
by chwe
Mon Aug 27, 2018 5:10 pm
Forum: General discussion
Topic: Is it really true, that the RPi runs faster when booting from a good USB Stick?
Replies: 31
Views: 10591

Re: Is it really true, that the RPi runs faster when booting from a good USB Stick?

Is it really true, that the RPi runs faster when booting from a good USB Stick? No. The Pi has as many CPU cores as it has and it executes code as fast as it does. No matter what storage is attached or how fast that can be accessed. Of course different storage media will have different read/write s...
by chwe
Fri Aug 24, 2018 6:14 pm
Forum: General discussion
Topic: inconsistencies in the documentation
Replies: 8
Views: 955

Re: inconsistencies in the documentation

It comes down to the fact you are reporting an issue in the wrong place. There is no guarantee that forums posts will be read by the requisite person, whereas I guarantee that the GitHub issue will be. c'mon.. :D you do fixes for the documentation, you read it - problem solved... I don't need a gua...
by chwe
Fri Aug 24, 2018 5:05 pm
Forum: General discussion
Topic: inconsistencies in the documentation
Replies: 8
Views: 955

Re: inconsistencies in the documentation

Actually, no, I don't really understand. All the docs are in github. If there is a problem with the docs, then the GitHub repo is the correct place to report the issue. There is also the opportunity to create your own fix and send it as a PR. Well I can open a issue copy paste the same stuff I wrot...
by chwe
Fri Aug 24, 2018 4:12 pm
Forum: General discussion
Topic: Is it really true, that the RPi runs faster when booting from a good USB Stick?
Replies: 31
Views: 10591

Re: Is it really true, that the RPi runs faster when booting from a good USB Stick?

I though this has to do with the fact that SSDs and rotating harddisks have much better random I/O performance ? ghans HDDs normally perform really bad when it comes to random IO.. A good SSD (even when connected over USB2 with a good SATA/USB bridge) should clearly outperform every SD-Card. For th...
by chwe
Fri Aug 24, 2018 3:00 pm
Forum: General discussion
Topic: inconsistencies in the documentation
Replies: 8
Views: 955

Re: inconsistencies in the documentation

And that is not difficult, just fork https://github.com/raspberrypi/documentation , commit and push your changes, and do a pull request. I do know how to fork and send PRs to projects but as soon as https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=219358&start=50#p1348677 was closed I opened...
by chwe
Thu Aug 23, 2018 4:48 pm
Forum: General discussion
Topic: inconsistencies in the documentation
Replies: 8
Views: 955

inconsistencies in the documentation

This discussion was IMO closed to early here: https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=219358&start=50#p1348677 https://www.raspberrypi.org/documentation/hardware/raspberrypi/frequency-management.md first: MEASURING TEMPERATURE Due to the architecture of the SoCs used on the Raspberry...
by chwe
Sat Aug 04, 2018 12:33 am
Forum: Networking and servers
Topic: Connect multiple raspberry pi's without internet
Replies: 4
Views: 738

Re: Connect multiple raspberry pi's without internet

set wifi of one pi into AP mode and let the others connect to it? Don't know how many open connections the Pi's wifi chip can handle when in AP mode. Probably everyone will have a bad ping (latency to the game) expect the one whose Pi sets up the AP.

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