README.md: Update NBD info

README.md

@@ -123,32 +123,82 @@ that contains the preferred partition name (for example `__common`).
   <summary> <b> NBD Server </b> </summary>
 <p>
 
-NBD server replaced HDL server. For using it, you need a way to run some NBD client on your machine.
+A [NBD](https://en.wikipedia.org/wiki/Network_block_device) server replaced HDL server.
+NBD is [formally documented](https://github.com/NetworkBlockDevice/nbd/blob/master/doc/proto.md)
+and developed as a collaborative open standard.
+The current implementation of the server is based on [lwNBD](https://github.com/bignaux/lwNBD),
+go there to contribute.
+The main advantage of using NBD is that the client will simulate a similar
+interface to the OS as if the device was plugged directly into your machine.
+All your favorite software that worked with the device directly connected to your
+machine, will work with the device accessible through the network.
 
-### Linux
+Currently, only export for HDD is supported by the server.
+You can use hdl-dump, pfs-shell, or even directly edit disk in some hex editor.
+Example, how to install HDL game to the HDD:
+Connect with your choosen client, then `hdl_dump inject_dvd ps2/nbd "Test Game" ./TEST.ISO`
+and when you're done, disconnect the client.
 
-For example, on Windows 10 you can use WSL2. The nbd client will create a block device on the PC. Currently, the only working nbd client on the WSL2 - `nbdfuse`.
-An example, how to install HDL game to the HDD:
+So you need a NBD client.
+Here we list some known compatible clients and how to use them.
+
+### nbd-client
+
+Supported: Linux, [Windows with WSL and custom kernel](https://github.com/microsoft/WSL/issues/5968)
+
+nbd-client requires nbd kernel support. If it isn't loaded,
+`sudo modprobe nbd` will do.
+
+connect:
+
+```sh
+nbd-client -no-optgo 192.168.1.45 /dev/nbd1 &
+```
+
+disconnect:
+
+```sh
+nbd-client -d /dev/nbd1
+```
+
+You'll generally need sudo to run this commands in root or
+add your user to the right group usually "disk".
+
+### nbdfuse
+
+Supported: Linux, Windows with WSL2
+
+connect:
 
 ```sh
 mkdir ps2
 nbdfuse ps2/ nbd://192.168.1.45 &
-hdl_dump inject_dvd ps2/nbd "Test Game" ./TEST.ISO
 ```
-After you are done, type `umount ps2` to prevent corruption.
 
-On pure Linux, you can also use `nbd-client -no-optgo`.
+disconnect:
+
+```sh
+umount ps2
+```
 
-### Windows
+### wnbd
 
-On Windows systems, you can use [WNBD client](https://cloudbase.it/ceph-for-windows/). Install, reboot, open elevated (with Administrator rights) [PowerShell](https://docs.microsoft.com/en-us/powershell/scripting/windows-powershell/starting-windows-powershell?view=powershell-7.1#how-to-start-windows-powershell-on-earlier-versions-of-windows) and type the following command:
+Supported: Windows
+
+[WNBD client](https://cloudbase.it/ceph-for-windows/).
+Install, reboot, open elevated (with Administrator rights) [PowerShell](https://docs.microsoft.com/en-us/powershell/scripting/windows-powershell/starting-windows-powershell?view=powershell-7.1#how-to-start-windows-powershell-on-earlier-versions-of-windows)
+
+connect:
 
 ```sh
 wnbd-client.exe map hdd0 192.168.1.22
 ```
 
-Now you can use hdl-dump, pfs-shell, or even directly edit disk in some hex editor.
-After you are done, type `wnbd-client.exe unmap hdd0` to prevent corruption.
+disconnect:
+
+```sh
+wnbd-client.exe unmap hdd0
+```
 
 ### Mac OS