September 03, 2020 by Steven Colson

 

You may have encountered an error code indicating that the boot disk is out of service. Well, there are several steps you can take to fix this problem. We'll get back to this shortly.

In the case of an unattended installation, the user does not need to enter anything or has received all the necessary information before starting the installation. This entry can be in the form of command line switches or a response file containing all the required parameters.

 

 


unattended boot disk

I have been asked to implement full disk encryption on a computer that should be left unattended. There are two hard drives in the car. The first hard drive has a boot partition and an operating system partition, while the second hard drive has only one partition and is used as storage for the application. The goal is to protect the data in the storage partition from being read in case someone decides to steal hard drives.



I am planning to use the Linux dm-crypt module to encrypt the operating system and storage partitions. I think it makes sense to have a key for each encrypted partition. However, I'm having a hard time figuring out how best to store each key.



The key of the storage partition seems to be safe to store in the operating system partition. However, it looks like the only option to keep the operating system partition key is to leave it in the boot partition. It would be nice if the computer had some kind of TPM or other local storage, but unfortunately there is no other storage.


What is an emergency boot disk?

A boot disk (boot disk) is used for an emergency boot or as an emergency disk if the system is not working properly! Typically, this hard drive is used to check the computer or so that the user can copy files in the event of a computer failure.


Since I still have to use initramfs to decrypt hardcodedon the operating system disk, I thought about storing the operating system partition key in initramfs that are built into the kernel, which is stored in the boot partition. This will prevent the data from being read by a random person who wants to steal hard drives. However, I understand that this is not ideal as a knowledgeable attacker would be able to extract the kernel initramfs and key from the initramfs image.

In my opinion, I need to tell the machine how to run the decryption routine, no matter how complex the circuit I might develop. An attacker only needs to read the decryption procedure to determine how the system should be decrypted.


What is unattended installation?


With available storage, what better way to encrypt partitions that are more resistant to attacks by owning hard drives?



 

 

 

 

 

 

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