Conceptual representation of procedure of data recovery by storing sector-by-sector all the surface data

Comments on Program coding:

In the program coding given earlier, basically we are proceeding to perform the following tasks step by step:

• Character array filename[80] stores the user defined path and file name of the file in which we are going to store the data temporarily.
• dinfo points to the diskinfo_t structure that contains the information of parameters required by the operation performed by the _bios_disk function.

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• Initialize the disk system using the interrupt 13H (function 00h) where regs.h.ah = 0x00 points to the function 00 H and regs.h.dl = 0x00 is used for a: floppy. And int86(0x13, &regs, &regs) invokes MS-DOS interrupt service INT 13 H.
• As we are going to read all the information of the surface of disk, The parameters of _bios_disk will be as follows:
  

• _bios_disk(_DISK_READ, &dinfo) reads the data from the physical surface of floppy disk from the sector specified by dinfo.
• The status returned is stored in result that is used to display the message for successful operation or to display an error message on the screen if any error occurs.

Sample Chapters from book DATA RECOVERY WITH AND WITHOUT PROGRAMMING by Author Tarun Tyagi

Publishers of the Book Number of Pages ISBN Price of the Book 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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