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Hard disk - Addressing modes | A Wisdom Archive on Hard disk - Addressing modes | | Hard disk - Addressing modes A selection of articles related to Hard disk - Addressing modes | |
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More material related to Hard Disk can be found here:
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Hard disk, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s, Hard disk - Access and interfaces, Hard disk - Addressing modes, Hard disk - Firms that have come and gone, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Manufacturers, Hard disk - Marketing capacity versus true capacity, Hard disk - Mechanics, Hard disk - Other characteristics, Hard disk - Timeline of capacity and other technical improvements, Early IBM disk storage, Superparamagnetic effect, External hard drive, Kryder's law
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ARTICLES RELATED TO Hard disk - Addressing modes | | | |  Hard disk - Addressing modes: Encyclopedia II - Hard disk - Addressing modesThere are two modes of addressing the data blocks on more recent hard disks. The older mode is CHS addressing (Cylinder-Head-Sector), used on old ST-506 and ATA drives and internally by the PC BIOS. The more recent mode is the LBA (Logical Block Addressing), used by SCSI drives and newer ATA drives (ATA drives power up in CHS mode for historical reasons).
CHS describes the disk space in terms of its physical dimensions, data-wise; this is the traditional way of accessing a disk on IBM PC compatible hardware, and while it works well fo ...
See also:Hard disk, Hard disk - Mechanics, Hard disk - Access and interfaces, Hard disk - Other characteristics, Hard disk - Addressing modes, Hard disk - Manufacturers, Hard disk - Firms that have come and gone, Hard disk - Marketing capacity versus true capacity, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Timeline of capacity and other technical improvements, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s, Hard disk - Derivative technologies Read more here: » Hard disk: Encyclopedia II - Hard disk - Addressing modes |
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| | | | Hard disk - Addressing modes: Encyclopedia II - Hard disk - Addressing modes There are two modes of addressing the data blocks on more recent hard disks. The older mode is CHS addressing (Cylinder-Head-Sector), used on old ST-506 and ATA drives and internally by the PC BIOS. The more recent mode is the LBA (Logical Block Addressing), used by SCSI drives and newer ATA drives (ATA drives power up in CHS mode for historical reasons).
CHS describes the disk space in terms of its physical dimensions, data-wise; this is the traditional way of accessing a disk on IBM PC compatible hardware, and while it works well fo ...
See also:Hard disk, Hard disk - Mechanics, Hard disk - Access and interfaces, Hard disk - Other characteristics, Hard disk - Addressing modes, Hard disk - Manufacturers, Hard disk - Firms that have come and gone, Hard disk - Marketing capacity versus true capacity, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Timeline of capacity and other technical improvements, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s Read more here: » Hard disk: Encyclopedia II - Hard disk - Addressing modes |
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| | | | Hard disk - Addressing modes: Encyclopedia II - Hard disk - Mechanics A hard disk uses rigid rotating platters (disks). Each platter has a planar magnetic surface on which digital data may be stored. Information is written to the disk by transmitting an electromagnetic flux through an antenna or read-write head that is very close to a magnetic material, which in turn changes its polarization due to the flux. The information can be read by a read-write head which senses electrical change as the magnetic fields pass by in ...
See also:Hard disk, Hard disk - Mechanics, Hard disk - Access and interfaces, Hard disk - Other characteristics, Hard disk - Addressing modes, Hard disk - Manufacturers, Hard disk - Firms that have come and gone, Hard disk - Marketing capacity versus true capacity, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Timeline of capacity and other technical improvements, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s Read more here: » Hard disk: Encyclopedia II - Hard disk - Mechanics |
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| | | | Hard disk - Addressing modes: Encyclopedia II - Hard disk - Mechanics A hard disk uses rigid rotating platters (disks). Each platter has a planar magnetic surface on which digital data may be stored. Information is written to the disk by transmitting an electromagnetic flux through an antenna or read-write head that is very close to a magnetic material, which in turn changes its polarization due to the flux. The information can be read by a read-write head which senses electrical change as the magnetic fields pass by in ...
See also:Hard disk, Hard disk - Mechanics, Hard disk - Access and interfaces, Hard disk - Other characteristics, Hard disk - Addressing modes, Hard disk - Manufacturers, Hard disk - Firms that have come and gone, Hard disk - Marketing capacity versus true capacity, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Timeline of capacity and other technical improvements, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s, Hard disk - Derivative technologies Read more here: » Hard disk: Encyclopedia II - Hard disk - Mechanics |
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| | | | Hard disk - Addressing modes: Encyclopedia II - Hard disk - Access and interfaces A hard disk is generally accessed over one of a number of bus types, including ATA (IDE, EIDE), Serial ATA, SCSI, SAS, FireWire (aka IEEE 1394), USB, and Fibre Channel.
Back in the days of the ST-506 interface, the data encoding scheme was also important. The first ST-506 disks used Modified Frequency Modulation (MFM) encoding (which is still used on the common "1.44 MB" (1.4 MiB) 3.5-inch floppy), and ran at a data rate of 5 megabits per second. Later on, controllers using 2,7 RLL (or just "RLL") encoding increased this by half, to 7.5 megabits pe ...
See also:Hard disk, Hard disk - Mechanics, Hard disk - Access and interfaces, Hard disk - Other characteristics, Hard disk - Addressing modes, Hard disk - Manufacturers, Hard disk - Firms that have come and gone, Hard disk - Marketing capacity versus true capacity, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Timeline of capacity and other technical improvements, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s, Hard disk - Derivative technologies Read more here: » Hard disk: Encyclopedia II - Hard disk - Access and interfaces |
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| | | | Hard disk - Addressing modes: Encyclopedia II - Hard disk - History The first hard disk drive was the IBM 350 Disk File, invented by Reynold Johnson and introduced in 1955 with the IBM 305 computer. This drive had fifty 24 inch platters, with a total capacity of five million characters. A single head was used for access to all the platters, making the average access time very slow.
The IBM 1301 Disk Storage Unit, announced in 1961, introduced the usage of a separate head for each data surface.
The first disk drive to use removable media was the IBM 1311 drive, which used the IBM 1316 disk ...
See also:Hard disk, Hard disk - Mechanics, Hard disk - Access and interfaces, Hard disk - Other characteristics, Hard disk - Addressing modes, Hard disk - Manufacturers, Hard disk - Firms that have come and gone, Hard disk - Marketing capacity versus true capacity, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Timeline of capacity and other technical improvements, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s, Hard disk - Derivative technologies Read more here: » Hard disk: Encyclopedia II - Hard disk - History |
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| | | | Hard disk - Addressing modes: Encyclopedia II - Hard disk - Timeline of capacity and other technical improvements
Hard disk - 1950s.
1956 - first commercial hard disk, the IBM 350 RAMAC disk drive, 5 megabyte.
Hard disk - 1960s.
Hard disk - 1970s.
Hard disk - 1980s.
1980 - first 5.25-inch Winchester drive, the Shugart ST-506, 5 megabyte (CS)
1986 - Standardization of SCSI
Hard disk - 1990s.
1991 - 100 megabyte hard drive (CS)
1994 - ATA-1 standardi ...
See also:Hard disk, Hard disk - Mechanics, Hard disk - Access and interfaces, Hard disk - Other characteristics, Hard disk - Addressing modes, Hard disk - Manufacturers, Hard disk - Firms that have come and gone, Hard disk - Marketing capacity versus true capacity, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Timeline of capacity and other technical improvements, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s, Hard disk - Derivative technologies Read more here: » Hard disk: Encyclopedia II - Hard disk - Timeline of capacity and other technical improvements |
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| | | | Hard disk - Addressing modes: Encyclopedia II - Hard disk - Manufacturers Most of the world's hard disks are now manufactured by just a handful of large firms: Seagate, Maxtor (now owned by Seagate), Western Digital, Samsung, and Hitachi, the former drive manufacturing division of IBM. Fujitsu continues to make specialist notebook and SCSI drives but exited the mass market in 2001. Toshiba is a major manufacturer of 2.5-inch and 1.8-inch notebook drives.
Hard d ...
See also:Hard disk, Hard disk - Mechanics, Hard disk - Access and interfaces, Hard disk - Other characteristics, Hard disk - Addressing modes, Hard disk - Manufacturers, Hard disk - Firms that have come and gone, Hard disk - Marketing capacity versus true capacity, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Timeline of capacity and other technical improvements, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s, Hard disk - Derivative technologies Read more here: » Hard disk: Encyclopedia II - Hard disk - Manufacturers |
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| | | | Hard disk - Addressing modes: Encyclopedia II - Hard disk - Manufacturers Most of the world's hard disks are now manufactured by just a handful of large firms: Seagate, Maxtor (now owned by Seagate), Western Digital, Samsung, and Hitachi, the former drive manufacturing division of IBM. Fujitsu continues to make specialist notebook and SCSI drives but exited the mass market in 2001. Toshiba is a major manufacturer of 2.5-inch and 1.8-inch notebook drives.
Hard d ...
See also:Hard disk, Hard disk - Mechanics, Hard disk - Access and interfaces, Hard disk - Other characteristics, Hard disk - Addressing modes, Hard disk - Manufacturers, Hard disk - Firms that have come and gone, Hard disk - Marketing capacity versus true capacity, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Timeline of capacity and other technical improvements, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s Read more here: » Hard disk: Encyclopedia II - Hard disk - Manufacturers |
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| | | | Hard disk - Addressing modes: Encyclopedia II - Hard disk - Access and interfaces A hard disk is generally accessed over one of a number of bus types, including ATA (IDE, EIDE), Serial ATA, SCSI, SAS, FireWire (aka IEEE 1394), USB, and Fibre Channel.
Back in the days of the ST-506 interface, the data encoding scheme was also important. The first ST-506 disks used Modified Frequency Modulation (MFM) encoding (which is still used on the common "1.44 MB" (1.4 MiB) 3.5-inch floppy), and ran at a data rate of 5 megabits per second. Later on, controllers using 2,7 RLL (or just "RLL") encoding increased this by half, to 7.5 megabits pe ...
See also:Hard disk, Hard disk - Mechanics, Hard disk - Access and interfaces, Hard disk - Other characteristics, Hard disk - Addressing modes, Hard disk - Manufacturers, Hard disk - Firms that have come and gone, Hard disk - Marketing capacity versus true capacity, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Timeline of capacity and other technical improvements, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s Read more here: » Hard disk: Encyclopedia II - Hard disk - Access and interfaces |
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| | | | Hard disk - Addressing modes: Encyclopedia II - Hard disk - Manufacturers Most of the world's hard disks are now manufactured by just a handful of large firms: Seagate, Maxtor (now owned by Seagate), Western Digital, Samsung, and the former drive manufacturing division of IBM, now owned by Hitachi. Fujitsu continues to make specialist notebook and SCSI drives but exited the mass market in 2001. Toshiba is a major manufacturer of 2.5-inch and 1.8-inch notebook drives.
Hard d ...
See also:Hard disk, Hard disk - Mechanics, Hard disk - Access and interfaces, Hard disk - Other characteristics, Hard disk - Addressing modes, Hard disk - Manufacturers, Hard disk - Firms that have come and gone, Hard disk - Marketing capacity versus true capacity, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Timeline of capacity and other technical improvements, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s Read more here: » Hard disk: Encyclopedia II - Hard disk - Manufacturers |
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| | | | Hard disk - Addressing modes: Encyclopedia II - Hard disk - History The first hard disk drive was the IBM 350 Disk File, invented by Reynold Johnson and introduced in 1955 with the IBM 305 computer. This drive had fifty 24 inch platters, with a total capacity of five million characters. A single head was used for access to all the platters, making the average access time very slow.
The IBM 1301 Disk Storage Unit, announced in 1961, introduced the usage of a separate head for each data surface.
The first disk drive to use removable media was the IBM 1311 drive, which used the IBM 1316 disk ...
See also:Hard disk, Hard disk - Mechanics, Hard disk - Access and interfaces, Hard disk - Other characteristics, Hard disk - Addressing modes, Hard disk - Manufacturers, Hard disk - Firms that have come and gone, Hard disk - Marketing capacity versus true capacity, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Timeline of capacity and other technical improvements, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s Read more here: » Hard disk: Encyclopedia II - Hard disk - History |
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| | | | Hard disk - Addressing modes: Encyclopedia II - Hard disk - Timeline of capacity and other technical improvements
Hard disk - 1950s.
1956 - first commercial hard disk, the IBM 350 RAMAC disk drive, 5 megabyte.
Hard disk - 1960s.
Hard disk - 1970s.
Hard disk - 1980s.
1980 - first 5.25-inch Winchester drive, the Shugart ST-506, 5 megabyte (CS)
Hard disk - 1 ...
See also:Hard disk, Hard disk - Mechanics, Hard disk - Access and interfaces, Hard disk - Other characteristics, Hard disk - Addressing modes, Hard disk - Manufacturers, Hard disk - Firms that have come and gone, Hard disk - Marketing capacity versus true capacity, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Timeline of capacity and other technical improvements, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s Read more here: » Hard disk: Encyclopedia II - Hard disk - Timeline of capacity and other technical improvements |
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| | | | Hard disk - Addressing modes: Encyclopedia II - Hard disk - Timeline of capacity and other technical improvements
Hard disk - 1950s.
1956 - first commercial hard disk, the IBM 350 RAMAC disk drive, 5 megabyte.
Hard disk - 1960s.
Hard disk - 1970s.
Hard disk - 1980s.
1980 - first 5.25-inch Winchester drive, the Shugart ST-506, 5 megabyte (CS)
1986 - Standardization of SCSI
Hard disk - 1990s.
1991 - 100 megabyte hard drive (CS)
1994 - ATA-1 standardi ...
See also:Hard disk, Hard disk - Mechanics, Hard disk - Access and interfaces, Hard disk - Other characteristics, Hard disk - Addressing modes, Hard disk - Manufacturers, Hard disk - Firms that have come and gone, Hard disk - Marketing capacity versus true capacity, Hard disk - Hard disk usage, Hard disk - History, Hard disk - Timeline of capacity and other technical improvements, Hard disk - 1950s, Hard disk - 1960s, Hard disk - 1970s, Hard disk - 1980s, Hard disk - 1990s, Hard disk - 2000s Read more here: » Hard disk: Encyclopedia II - Hard disk - Timeline of capacity and other technical improvements |
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More material related to Hard Disk can be found here:
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