What is the risk of disconnecting an unmounted hard drive from a working computer?

Question

linux

The essence is a combat server on Linux, there is no access to it during non-working hours, it is highly undesirable to turn it off during working hours. Two hard drives hang on it, one of which just died, the second is alive, but unmounted and, in fact, only consumes energy.
Is it possible to pull them out without turning off the computer?
How does Linux tolerate such an operation?

Answer 1

How does Linux tolerate such an operation?

It tolerates well. If you do not confuse the disk with the system

Answer 2

This is called "hot shutdown". Depends on HDD interface and motherboard support.
SATA Revision 1.0 with a 15-pin SATA power interface (but not a 4-pin IDE power connector) is supported.
PS Opening the case and getting into a running server twice a day is a dubious occupation. All modern drives have a sleep mode. A resource can be several decades old - they will become morally obsolete faster. And you, by pulling out the wires, will break the connector in a year.

Answer 3

nothing,
even when hot,
I don’t think that you have an ancient screw with an IDE bus