Sector

sector

)The smallest unit that can be accessed on a disk. When a disk undergoes a low-level format, it is divided into tracks and sectors. The tracks are concentric circles around the disk and the sectors are segments within each circle. For example, a formatted disk might have 40 tracks, with each track divided into 10 sectors. The operating system and disk drive keep tabs on where information is stored on the disk by noting its track and sector number.

Modern hard disk drives use a technique called zoned-bit recording in which tracks on the outside of the disk contain more sectors than those on the inside.

A sector that cannot be used due to a physical flaw on the disk is called a bad sector.

Webopedia Staff
Webopedia Staff
Since 1995, more than 100 tech experts and researchers have kept Webopedia’s definitions, articles, and study guides up to date. For more information on current editorial staff, please visit our About page.

Related Articles

Client Support Manager

A client support manager is a professional who is expected to provide direct customer service support for specific clients. They work with clients to...

ScalaHosting

ScalaHosting is a leading managed hosting provider that offers secure, scalable, and affordable cloud VPS solutions for businesses. It claims to change the status...

Data Visualization

Data visualization is the graphic representation of data so that analysts, readers, clients, and stakeholders can more easily see the implications of the raw...

RSA SecurID

RSA SecurID is multi-factor authentication (MFA) technology used to protect network resources, such as applications and websites. Its purpose is to mitigate risk and...

ScalaHosting

ScalaHosting is a leading managed hosting provider that offers secure, scalable, and affordable...

HRIS

Human resources information system (HRIS) solutions help businesses manage multiple facets of their...

Best Managed Service Providers...

In today's business world, managed services are more critical than ever. They can...