An administrator is investigating a physical server that will not boot. What issue is likely if the server passes POST but the OS does not load?

An administrator is investigating a physical server that will not boot. What issue is likely if the server passes POST but the OS does not load?

• A. Corrupt BIOS settings
• B. Faulty CPU
• C. Multiple failed hard drives
• D. Incorrect RAM configuration

Answer: (C)

When a physical server passes the Power-On Self-Test (POST) but fails to load the operating system, this indicates that the initial hardware checks have been cleared, and the server is functional at a basic level. In this context, if there are multiple failed hard drives, the server would be unable to access the necessary files to load the operating system, thus causing a failure to boot. In many server configurations, particularly those using RAID, multiple failed drives can lead to a complete loss of access to the operating system. When the system attempts to read from these drives and fails due to their inoperable status, it cannot complete the boot process. Additionally, while corrupt BIOS settings, a faulty CPU, and incorrect RAM configurations could potentially cause boot issues, they would generally prevent the server from passing POST, making them less likely in this scenario. A corrupted BIOS settings could lead to issues during POST, a faulty CPU would typically halt the process entirely, and RAM issues might result in POST errors rather than a successful test followed by an OS failure. Thus, the likelihood of multiple failed hard drives being the primary cause of the boot failure, while POST is successful, aligns directly with the symptoms presented.

When a physical server passes the Power-On Self-Test (POST) but fails to load the operating system, this indicates that the initial hardware checks have been cleared, and the server is functional at a basic level. In this context, if there are multiple failed hard drives, the server would be unable to access the necessary files to load the operating system, thus causing a failure to boot.

In many server configurations, particularly those using RAID, multiple failed drives can lead to a complete loss of access to the operating system. When the system attempts to read from these drives and fails due to their inoperable status, it cannot complete the boot process.

Additionally, while corrupt BIOS settings, a faulty CPU, and incorrect RAM configurations could potentially cause boot issues, they would generally prevent the server from passing POST, making them less likely in this scenario. A corrupted BIOS settings could lead to issues during POST, a faulty CPU would typically halt the process entirely, and RAM issues might result in POST errors rather than a successful test followed by an OS failure. Thus, the likelihood of multiple failed hard drives being the primary cause of the boot failure, while POST is successful, aligns directly with the symptoms presented.