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In databases, "sectors," "pages," and "blocks" are terms often used to describe different units of data storage at various levels, depending on the underlying storage technology. |
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Sectors:
Sectors are the smallest unit of data storage on a physical storage device, typically found in traditional mechanical storage devices like Hard Disk Drives (HDDs).
A sector is a fixed-size block of data that can be read from or written to the storage device. The most common sector size is 512 bytes, though some devices now use larger sector sizes, such as 4 KB (4096 bytes).
The operating system and storage controller interact with the storage device at the sector level. When data is read or written, it is done in multiples of sectors.
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