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Linux x86_64: Detecting Hardware Errors

The Blue Screen of Death (BSoD) is used by Microsoft Windows, after encountering a critical system error. Linux / UNIX like operating system may get a kernel panic. It is just like BSoD. The BSoD and a kernel panic generated using a Machine Check Exception (MCE). MCE is nothing but feature of AMD / Intel 64 bit systems which is used to detect an unrecoverable hardware problem. MCE can detect:

  • Communication error between CPU and motherboard.
  • Memory error - ECC problems.
  • CPU cache errors and so on.

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Test If Linux Server SCSI / SATA Hard Disk Going Bad

One of our regular reader sends us a question:

How can I test if my hard disk is going bad? I see few errors in /var/log/messages file.

I/O errors in /var/log/messages indicates that something is wrong with the hard disk and it may be failing. You can check hard disk for errors using smartctl command, which is control and monitor utility for SMART disks under Linux / UNIX like operating systems.
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