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2:26 AM

0

Q: Trouble Creating Text Input File for Linux Executable

I am running Ubuntu 16.04.4. I have an executable that takes initial condition inputs from a text file, performs calculations, and generates an output file. I want to run calculations for a large number of initial conditions, so I wrote a python script (python 3.5.2 running in Spyder 3) to create...

Nathan Osman

3:23 AM

Windows Update. Ugh.

> Disk  Random 16.0 Read                       1221.28 MB/s          9.0
> Disk  Sequential 64.0 Read                   3002.01 MB/s          9.2
> Disk  Sequential 64.0 Write                  1516.68 MB/s          8.8
> Average Read Time with Sequential Writes     0.087 ms          8.8
> Latency: 95th Percentile                     0.203 ms          8.9
> Latency: Maximum                             3.656 ms          8.6
> Average Read Time with Random Writes         0.094 ms          8.9

Now there's some stats to be proud of.

3 GB/s read - what a world we live in.

Seth

3:41 AM

Task Manager claims I can get that off a 7200RPM disk. I'm somewhat skeptical.

What kind of disk is that Nathan?

Nathan Osman

4:01 AM

Are you sure?

3 GB/s. ?

And not 3 Gbps?

Even 3 Gbps sounds like a lot for a spinning disk.

It's an NVMe-attached SSD.

Seth

@NathanOsman Yeah task manager is set to MB/s and I've seen it spike to 3,000 MB/s

now of course we all know how good windows is at calculating disk speeds and times.

3

Nathan Osman

3 GB/s is impossible with a SATA-attached disk.

So I'd say that's an error.

Seth

oh that is a pretty big limiter on it isn't it lol.

Didn't even think of that

Nathan Osman

0.8 GB/s is about the maximum for SATA 6Gb/s.

And I've never seen a spinning disk reach those speeds.

I'd expect something more in the range of 1-1.6 Gbps.

dessert

8:09 AM

I accidentally dupe-hammered a question – am I still able to cast a normal duplicate close vote that gets reviewed by others even when I own a golden tag badge anyhow?

terdon

@dessert No

dessert

So if I don’t want to dupe-hammer it I can now just comment… oh wait, there are still flags.

OK, I think I got it. :)

terdon

@dessert Yeah. Shog explained it nicely on this meta U&L post:

8

A: How does one relinquish his/her right to close questions without review?

You don't like it because the normal vote-to-close behavior tricks you into thinking your opinion is worth less than it really is. But it is a trick. Your opinion is worth a lot. Finding duplicates is hard. You have to know what to search for, and then know enough about the topic to say wheth...

dessert

@terdon great, thanks!

dessert

8:53 AM

recently I learned you can make your life essentially easier with a simple softlink:

sudo ln -s /dev/null /n

sending output into a dark oblivion needs so much less typing now :>

Takkat

9:58 AM

My son's Windows tells me that it found a "hardware error" and it recommends I should go and ask the manufacturer about it.

I am not complaining (or yes I might a bit) but after all those decades shouldn't they have found a way for better error messages? Is that asking for too much?

I am the manufacturer in this case.

I am also the system administrator for other errors.

Takkat

10:18 AM

I am a genius ! - I found the solution: replacing the broken hardware should fix a hardware error.

Rinzwind

@Takkat or introduce 2 more hardware errors :=)

Takkat

yeah :D

I found out that if you had bought Windows 10 it lets you reinstall a certain times only (not saying how often) - even after you had attached it to your Microsoft Account.

Ubuntu Questions on U&L

0

Q: the 'grub-efi-amd64-signed' package failed to install into /target/

I am trying to install Ubuntu 18.04 but I get this error at the end of installation process! I tried to create a partition with ext4 for \boot. also ext1 but non of them worked. Also I tried to choose the ntfs partition that my Windows 10 grub file is in that but didn't work too. I also had Ubu...

ubuntu package-management system-installation grub2 error-handling

dessert

10:44 AM

@Takkat that’s just fraud if you ask me

Takkat

No idea, I don't really feel like wanting to reinstall it again. In case of urgency I let my son do that - he wanted it, he has to maintain it.

He will have to maintain it until he does not want it anymore... we're a good way closer to that now ;P

dessert

11:00 AM

friggin’ good question:

1

Q: Redirect real webcam to a virtual webcam via terminal

Short question (TL;DR) Is there a way to redirect a real webcam to a virtual webcam from terminal, for example using the v4l2loopback module with ffmpeg ? Details I have installed a (quite old) webcam which works with most software (e.g. vlc, cheese, etc.), but it doesn't work with some critic...

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