hdparm

In the following code, I write messages to a file using bufio in golang. My disk I/O speed is about 1000M/s. Strangely, when the size of the written file is less than 20G, the writing speed is about 800M~900M per second, a little bit less than the I/O speed. But, when the file size is more than 21G, I found the writing speed is about 200M per second, much less than the I/O speed. I don't know why, anybody can help me? Thank you.

I'm compiling a test program on clion using windows subsystem for linux WSL. I am using dlopen etc. to load a library at runtime. The error I am getting is:

I would like to partially colorize the output of any given bash command in my scripts, just to make it pretty and easy to catch important information displayed on the screen.

It's rather easy to echo colored results, but I failed with commands displaying some system measurements.

Let's use hdparm as an example.

Ok I am trying to find a way I can run

If you run hdparm -I /dev/X where X is your SSD device, it would print info (read-only operation) something similar to this

I'm running MPD on a Raspberry Pi connected to an USB HDD Dock over USB. The HDD Is formatted in BTRFS and I mount a subvolume (-o subvol=Music,autodefrag,space_cache,compress,relatime). Unfortunately i can't control the HDD's spin downs. The HDD spins down and goes to stand by after approx. 30 secs.

I've already tried HDPARM with:

hdparm -B 254 -S 0 /dev/sda

And HD-IDLE with:

hd-idle -i 0 -a sda -i 1200

with no effect.

As a dirty trick i moved the mpd's log file to the external HDD and revved up MPD's log verbosity (but this is not reliable). Currently i'm running an infinite loop to keep the drive alive.

I need some advice how to regulate this issue.

I have a USB drive that my Ubuntu machine can't format. I think the problem originated when I was using Rufus or UNetBootin inside a Windows VM and got a blue screen. There's no important data on there, I just want to be able to use it. It's probably not worth the trouble but I want to understand the problem in case it happens again. I tried all sorts of tools but none of them seems to be low-level enough to rewrite the partition table.

Here is the output of some of the tools I tried. As you can note, there is no sdb1 or any found partition because the table is unreadable. I can use a Windows host too if the only solution is by using some ".exe" but I'd rather use UNIX terminal tools if possible.