A. Incorrect: A track is a circular path on the platter, but it's not the smallest unit.
B. Incorrect: A cluster is a group of sectors, larger than a single sector.
C. Correct: A sector is the smallest physical storage unit on a hard drive, typically 512 bytes or 4 KB in size.
D. Incorrect: A platter is a physical component of the drive, not a storage unit.
The correct answer is C. Sector.
A sector is the smallest physical storage unit on a hard drive, typically sized at 512 bytes or 4,096 bytes (4KB). Sectors are the basic units of data storage on a hard drive, and they are organized into tracks, which are circular paths on the disk.
Here's a brief overview of the physical storage units on a hard drive, from smallest to largest:
Sector: 512 bytes or 4KB
Track: A circular path on the disk, containing multiple sectors
Cluster: A group of sectors, often 4 or 8, treated as a single unit by the file system
Platter: One of the circular disks inside the hard drive, containing multiple tracks and sectors
So, the correct order from smallest to largest is:
Sector < Track < Cluster < Platter
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