Changing CPU Scaling Governor on Linux

Through “Scaling Governor”, you can choose the optimal CPU frequency control scheme, which affects power consumption and performance.

On highly loaded access servers, acquaintances had cases of server hangup during “ondemand”, although I did not have such cases, but still I recommend changing it to “performance”.
On laptops and lightly loaded servers, you can leave “ondemand” to save energy.

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How did I make a request to Hetzner to replace the disk in the raid

Already quite often I wrote in Hetzner to replace disks in a raid and in this article I will describe one of the cases.

And so, one morning, after a disk dropped out of a raid, mdadm sent me a message by email.
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