Why Backup DBR disk geometry error messages Disk boot failure Non system disk or disk error Invalid system disk or Disk I/O error Replace the disk, and then press any key.

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Why Backup DBR:

The DBR contains some important information about the disk geometry. This information is located in the first sector of every partition, such as:

  • Jump Code + NOP
  • OEM Name and Version
  • Bytes Per Sector
  • Sectors Per Cluster
  • Reserved Sectors
  • Number of Copies of FAT
  • Maximum Root Directory Entries (but Not Available for FAT32)
  • Number of Sectors in Partition Smaller than 32MB (Therefore Not Available for FAT32)
  • Media Descriptor (F8H for Hard Disks)
  • Sectors Per FAT (In Older FAT Systems and Not Available for FAT32)
  • Sectors Per Track
  • Number of Heads
  • Number of Hidden Sectors in Partition
  • Number of Sectors in Partition
  • Number of Sectors Per FAT
  • FAT Information Descriptor Flags
  • Version of FAT32 Drive
  • Cluster Number of the Start of the Root Directory
  • Sector Number of the File System Information Sector
  • Sector Number of the Backup Boot Sector
  • Reserved
  • Logical Drive Number of Partition
  • Extended Signature (29H)
  • Serial Number of Partition
  • Volume Name of Partition
  • FAT Name
  • Executable Code
  • Executable Marker or Magic Number (AAH 55H)

Generally, the following error messages are displayed on the screen:

“Disk boot failure”

“Non system disk or disk error”

“Invalid system disk or Disk I/O error”

“Replace the disk, and then press any key…”

 


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Data Recovery with & without Programming


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BPB Publications, New Delhi, India
540
81-7656-922-4
$69.00 (Including Shipping Charges, Cost of Book and Other expenses, Free Source Code CD included with the Book)





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