Host Protected Area

Host Protected Area

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Description

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The host protected area, sometimes referred to as hidden protected area, is an area of a hard drive that is not normally visible to an operating system. Operating systems use the IDENTIFY DEVICE command to find out the addressable space of a hard drive. The IDENTIFY DEVICE command queries a particular register on the IDE controller to establish the size of a drive. This register however can be changed using the SET MAX ADDRESS ATA command. If the value in the register is set to less than the actual hard drive size then effectively a host protected area is created. It is protected because the OS will work with only the value in the register that is returned by the IDENTIFY DEVICE command and thus will normally be unable to address the parts of the drive that lie within the HPA.show more

Product details

  • Paperback | 112 pages
  • 152 x 229 x 7mm | 177g
  • Plaispublishing
  • United States
  • English
  • black & white illustrations
  • 613637501X
  • 9786136375014