O'Reilly logo

Absolute FreeBSD, 2nd Edition by Michael W. Lucas

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Slicing Disks

Remember from Chapter 8 that FreeBSD divides disks in two distinct ways: slices and partitions. A slice is a BIOS partition, the only sort of partition recognized by older Microsoft Windows systems. A FreeBSD partition is a subdivision of a slice. FreeBSD lets you configure slices and partitions separately. A single disk (on i386 and amd64) can have up to four slices, and each slice can have up to eight partitions. FreeBSD filesystems are on partitions inside slices.

Before the first slice, you'll find the Master Boot Record (MBR) at cylinder 0, head 0, sector 1. The MBR contains the slice table as well as the system's initial bootstrapping code. The MBR is strictly limited to 512 bytes, which seemed like a lot of space at the time ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required