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2. Cylinder-head-sector - Wikipedia

   en.wikipedia.org/wiki/Cylinder-head-sector

   Cylinder, head, and sector of a hard drive. Cylinder-head-sector (CHS) is an early method for giving addresses to each physical block of data on a hard disk drive. It is a 3D-coordinate system made out of a vertical coordinate head, a horizontal (or radial) coordinate cylinder, and an angular coordinate sector. Head selects a circular surface ...

3. Track (disk drive) - Wikipedia

   en.wikipedia.org/wiki/Track_(disk_drive)

   (A) Track (B) Geometrical sector (C) Track sector (D) Cluster. A disk drive track is a circular path on the surface of a disk or diskette on which information is magnetically recorded and from which recorded information is read. A track is a physical division of data in a disk drive, as used in the Cylinder-Head-Record (CCHHR) addressing mode ...

4. Disk sector - Wikipedia

   en.wikipedia.org/wiki/Disk_sector

   In computer file systems, a cluster (sometimes also called allocation unit or block) is a unit of disk space allocation for files and directories.To reduce the overhead of managing on-disk data structures, the filesystem does not allocate individual disk sectors by default, but contiguous groups of sectors, called clusters.

5. Disk storage - Wikipedia

   en.wikipedia.org/wiki/Disk_storage

   Sector A segment of a track Low level formatting Establishing the tracks and sectors. Head The device that reads and writes the information—magnetic or optical—on the disk surface. Arm The mechanical assembly that supports the head as it moves in and out. Seek time Time needed to move the head to a new position (specific track). Rotational ...

6. List of floppy disk formats - Wikipedia

   en.wikipedia.org/wiki/List_of_floppy_disk_formats

   Disks varied sectors / track and disk speed to keep consistent bit density across tracks [26] Double 2 512 1,196 kB [27] Tandy TRS-80 5 1 ⁄ 4 inch Single 1 35 10 256 soft 88 kB 300 FM Model 1/3/4 5 1 ⁄ 4 inch Double 1 40 18 256 180 kB MFM Model 1/3/4P 5 1 ⁄ 4 inch Double 2 40 18 256 360 kB MFM Model 4D 8 inch Double 1 77 26 256 500 kB MFM ...

7. Logical block addressing - Wikipedia

   en.wikipedia.org/wiki/Logical_block_addressing

   Once the track is exhausted, numbering continues to the second head, while staying inside the first cylinder. Once all heads inside the first cylinder are exhausted, numbering continues from the second cylinder, etc. Thus, the lower the LBA value is, the closer the physical sector is to the hard drive's first (that is, outermost [5]) cylinder ...