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What causes a non-system disk error?

April 26, 2017causes disk Error non-system

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What causes a non-system disk error?

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A. Non-System Disk or Disk Error results when the Basic Input/Output System (BIOS) cannot find the boot sector or the master boot record is missing or damaged; i.e. the device does not have bootable media. The BIOS searches drives in the order usually specified in the CMOS Setup. This order is often, but not always, A: (floppy drive), C: (first partition on the hard disk)… The error will occur during startup if the CMOS is set so the BIOS seeks the floppy drive first and a non-bootable (or blank) floppy is in (was left in) the floppy drive.