Linux: Incorrect disk space on the LUKS LVM volume

I have a new hard drive connected to my machine (CentOS 7.6), 1TB in size.

  • used to fdisk To create a new primary partition there in size of 500 GB, type "8e" (Linux LVM).

  • Then I marked it as a physical volume LVM: pvcreate / dev /

  • After that I created a group of volumes and added the partition: vgcreate vg1 / dev /

  • In addition to that, I created a logical volume that used all the space available in the volume group: lvcreate -n lv1 -l 100% FREE vg1

  • Then I converted this logical volume to the LUKS format: cryptsetup luksFormat / dev / vg1 / lv1

  • Finally on top of that I added an ext4 file system: mkfs.ext4 / dev / vg1 / lv1

It worked quite well and, using the password phrase set in LUKS format and with some / etc / fstab Y / etc / crypttab Magic, I could mount it permanently in / mnt / my_new_data.

Everything is fine, except an interesting problem. The command df -hT It shows me something like this:

Type of file system Size used Leveraging% mounted on
// ..................
// ..................
/ dev / mapper / vg1-lv1 ext4 493G 73M 467G 1% / mnt / my_new_data

How is it saying 493 GB instead of 500 GB? Also (the most important): why are there only 467 GB available? I have not added any files in that directory yet. Since when is 467GB + 73MB = 493GB?

Keep that in mind:

  • pvs Reports 500GB as size for physical volume.
  • vgs reports 500 GB as size for the volume group
  • lvs reports 500GB as szie for the logical volume
  • lsblk reports 500GB as size for that partition

Each tool says that my disk should have a size of 500 GB. Except apparently I only have 467GB available.

What am I missing?

Could the LUKS encryption have something to do with that?

Unit 16.04: How to control the volume of Chrome?

I'm in ubuntu 16.04 unity, every time I see YouTube in Chrome and I want to increase or decrease the volume, I have to go to PulseAudio and change it from there.

The volume control has no control over the chromium. It works but the chrome is independent.

Which NON-KYC P2P exchange has the highest purchase / sale volume?

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Change the size of the Windows volume indicator


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I changed the developer option to disable the "Absolute" volume, but this had no effect. What might have happened?

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I am studying the optimization of the partial differential equation, and this is the problem of the elliptical model:

(one) $ – nabla space cdot (e ^ u nabla y_i) = q_i space space space x en Omega $

(two) $ nabla and_i space cdot space n = 0 $

(3) $ int_ Omega y_i space d Omega = 0 space space space i = 1, …, n_s $

Where $ Omega subset mathbb {R} ^ 3 $. My biggest problem is equation 3, which is said to insure the singularity. I know that $ n $ is the normal vector in the limit $ partial Omega $ but I can only guess $ n_s $ It's the number of normal vectors, but I'm not totally sure. I know that this means that the integral is above all the volume, but it's also equal to zero, so that does not make every y a point? Also, how does the $ i $ subindex factor in this?

windows volume licenses


Could you recommend the best provider for the Windows 2012 and 2016 server licenses?

I want to resell them together with vps servers.

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multivariate calculation – rectangle R =[0,1]X[0,3]. Provide two examples of functions so that the integral of f over R produces volume and the integral of g over R has no volume.

Consider the rectangle R =[0,1]X[0,3]. Provide two examples of functions f (x, y) and g (x, y) so that the integral of f over R produces volume and the integral of g over R does not yield volume.

I really can not wrap my head around this. Explain the solution if you wish.

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In previous versions of iOS, this was adjustable with the volume level of the system. Now it is not. Is this an error, a characteristic, or is there a way to change this?

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