Copyright © Philip M. Parker, INSEAD. Terms of Use.

LOGICAL BLOCK ADDRESSING

Specialty Definition: LOGICAL BLOCK ADDRESSING

DomainDefinition

Computing

Logical Block Addressing (LBA) A hard disk sector addressing scheme used on all SCSI hard disks, and on ATA-2 conforming IDE hard disks. The addressing conversion is performed by the hard disk firmware. Prior to LBA, combined limitations of IBM PC BIOS and ATA restricted the useful capacity of IDE hard disks on IBM PCs and compatibles to 1024 cylinders * 63 sectors per track * 16 heads * 512 bytes per sector = 528 million bytes = 504 megabytes. Modern BIOSes select LBA mode automatically, and work around the 1024-cylinder BIOS limit by representing a hard disk to the OS as having e.g. half as many cylinders and twice as many heads. However, there is still an unbreakable BIOS disk size limit of 1024 cylinders * 63 sectors per track * 256 heads * 512 bytes per sector = 8 gigabytes, but modern OSes (including Windows 9x, Windows NT and Linux) are not affected by it, since they issue direct LBA-based calls, bypassing the BIOS hard disk services completely. (2000-04-30). Source: The Free On-line Dictionary of Computing.

Source: compiled by the editor from various references; see credits.

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Crosswords: LOGICAL BLOCK ADDRESSING

Specialty definitions using "LOGICAL BLOCK ADDRESSING": Dynamic Drive Overlay ♦ LBA. (references)

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Frequency of Internet Keywords: LOGICAL BLOCK ADDRESSING

The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com.
 
ExpressionFrequency
per Day

logical block addressing

5
Source: compiled by the editor from various references; see credits.

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Alternative Orthography: LOGICAL BLOCK ADDRESSING


Hexadecimal (or equivalents, 770AD-1900s) (references)

4C 4F 47 49 43 41 4C      42 4C 4F 43 4B      41 44 44 52 45 53 53 49 4E 47

Leonardo da Vinci (1452-1519; backwards) (references)

        

Binary Code (1918-1938, probably earlier) (references)

01001100 01001111 01000111 01001001 01000011 01000001 01001100 00100000 01000010 01001100 01001111 01000011 01001011 00100000 01000001 01000100 01000100 01010010 01000101 01010011 01010011 01001001 01001110 01000111

HTML Code (1990) (references)

&#76 &#79 &#71 &#73 &#67 &#65 &#76 &#32 &#66 &#76 &#79 &#67 &#75 &#32 &#65 &#68 &#68 &#82 &#69 &#83 &#83 &#73 &#78 &#71

ISO 10646 (1991-1993) (references)

004C 004F 0047 0049 0043 0041 004C      0042 004C 004F 0043 004B      0041 0044 0044 0052 0045 0053 0053 0049 004E 0047

Encryption (beginner's substitution cypher): (references)

4649414337354623646493745235383852395353434841

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INDEX

1. Crosswords
2. Expressions: Internet
3. Orthography
4. Bibliography


  

Copyright © Philip M. Parker, INSEAD. Terms of Use.