In DOS version 5, another mode of operation was added : specifying a single filename on the command-line would cause the program to test all the disk sectors used to store the file, and shorten the file by omitting sectors which tested bad.
42.
Given the small size of a boot sector ( 512 Bytes ), " stage 1 " can do little more than load the next stage of GRUB by loading a few disk sectors from a fixed location near the start of the disk ( within its first 1024 cylinders ).
43.
For example, in Windows certain registry keys use short filenames, which are sometimes not reproduced by file-based backup, some commercial software uses copy protection that will cause problems if a file is moved to a different disk sector, and file-based backups do not always reproduce metadata such as security attributes.
44.
"' Advanced Format "'is a generic term pertaining to any disk sector format used to store data on magnetic disks in hard disk drives ( HDDs ) that exceeds 512 to 528 bytes per sector, such as the 4096-byte ( 4 KiB ) sectors of the first-generation Advanced Format hard disk drives.
45.
So if you format your hard disk and you want to reinstall Windows from a disc, the BIOS first finds your optical drive, reads the first few disk sectors from it, identifies that the disc is a boot disc, and then starts executing the code that it loaded from the disc in order to load up the installer from the disc.
46.
In September 2008 SDK announced a consolidation their hard disk ( HD ) media operations by establishing a joint venture with Hoya corporation in January 2009 . The joint venture, will owned about 75 % by SDK and about 25 % by HOYA . However this joint venture ended in March 2009 due to the rapid deterioration of the global economy in the Hard Disk Sector.
