Information about Zone Bit Recording
Zone Bit Recording (ZBR) is used by disk drives to store more sectors per track on outer tracks than on inner tracks. It is also called Zone Constant Angular Velocity (Zone CAV or Z-CAV or ZCAV).
On a disk consisting of concentric tracks, the physical track length increases with distance from the center hub. Therefore, holding storage density constant, the track storage capacity likewise increases with distance from the center.
To implement ZBR, a drive's controller varies the rate at which it reads and writes - faster on outer tracks. Alternatively, the disk rotation rate could be slowed, as was done by the original Apple Macintosh floppy disk.
On a disk consisting of concentric tracks, the physical track length increases with distance from the center hub. Therefore, holding storage density constant, the track storage capacity likewise increases with distance from the center.
To implement ZBR, a drive's controller varies the rate at which it reads and writes - faster on outer tracks. Alternatively, the disk rotation rate could be slowed, as was done by the original Apple Macintosh floppy disk.
Products that use ZBR/ZCAV
- Commodore 1541 floppy disk
- Apple Macintosh 400K/800K floppy disk
- DVD-RAM
- HD DVD-RW (note: not HD DVD-ROM or HD DVD-R)
- Most hard drives since the 1990s
See also
Edison cylinder phonograph ca. 1899. The Phonograph cylinder is a storage medium. The phonograph may or may not be considered a storage device.]] A data storage device is a device for recording (storing) information (data).
..... Click the link for more information.
..... Click the link for more information.
sector
(C) Track sector
(D) Cluster]] In the context of computer disk storage, a sector is a sub-division of a track (Figure 1, item A)[1] on a magnetic disk or optical disc. Each sector stores a fixed amount of data.
..... Click the link for more information.
(C) Track sector
(D) Cluster]] In the context of computer disk storage, a sector is a sub-division of a track (Figure 1, item A)[1] on a magnetic disk or optical disc. Each sector stores a fixed amount of data.
..... Click the link for more information.
Cylinder-head-sector, also known as CHS, was an early method for giving addresses to each physical block of data on a hard disk drive. In the case of floppy drives, for which the same exact diskette medium can be truly low-level formatted
..... Click the link for more information.
..... Click the link for more information.
Constant angular velocity (CAV) describes the motion of a body rotating at a constant angular velocity, because as it rotates it moves through a constant angle per unit time. CAV is one method of writing or reading information from a rotating data disc.
..... Click the link for more information.
..... Click the link for more information.
Concentric objects share the same center, axis or origin with one inside the other. Circles, tubes, cylindrical shafts, disks, and spheres may be concentric. Concentric objects do not necessarily have the same radius.
..... Click the link for more information.
..... Click the link for more information.
Macintosh, commonly known as Mac, is a brand name which covers several lines of personal computers designed, developed, and marketed by Apple Inc. Named after the McIntosh variety of apple, the original Macintosh was released on January 24, 1984.
..... Click the link for more information.
..... Click the link for more information.
Floppy Disk Drive
8 inch, 5 ¼ inch, and 3.5 inch drives
Date Invented: 1969 (8 inch), 1976 (5 ¼ inch), 1983 (3.5 inch)
Invented By: IBM team led by David Noble
Connects to:
..... Click the link for more information.
8 inch, 5 ¼ inch, and 3.5 inch drives
Date Invented: 1969 (8 inch), 1976 (5 ¼ inch), 1983 (3.5 inch)
Invented By: IBM team led by David Noble
Connects to:
..... Click the link for more information.
The Commodore 1541 (aka CBM 1541, and originally called VIC-1541), made by Commodore International, was the best-known floppy disk drive for the Commodore 64 home computer. The 1541 was a single-sided 170 kilobyte drive for 5¼" disks.
..... Click the link for more information.
..... Click the link for more information.
Floppy Disk Drive
8 inch, 5 ¼ inch, and 3.5 inch drives
Date Invented: 1969 (8 inch), 1976 (5 ¼ inch), 1983 (3.5 inch)
Invented By: IBM team led by David Noble
Connects to:
..... Click the link for more information.
8 inch, 5 ¼ inch, and 3.5 inch drives
Date Invented: 1969 (8 inch), 1976 (5 ¼ inch), 1983 (3.5 inch)
Invented By: IBM team led by David Noble
Connects to:
..... Click the link for more information.
Macintosh, commonly known as Mac, is a brand name which covers several lines of personal computers designed, developed, and marketed by Apple Inc. Named after the McIntosh variety of apple, the original Macintosh was released on January 24, 1984.
..... Click the link for more information.
..... Click the link for more information.
Floppy Disk Drive
8 inch, 5 ¼ inch, and 3.5 inch drives
Date Invented: 1969 (8 inch), 1976 (5 ¼ inch), 1983 (3.5 inch)
Invented By: IBM team led by David Noble
Connects to:
..... Click the link for more information.
8 inch, 5 ¼ inch, and 3.5 inch drives
Date Invented: 1969 (8 inch), 1976 (5 ¼ inch), 1983 (3.5 inch)
Invented By: IBM team led by David Noble
Connects to:
..... Click the link for more information.
DVD-RAM (DVD–Random Access Memory) is a disc specification presented in 1996 by the DVD Forum, which specifies rewritable DVD-RAM media and the appropriate DVD writers. DVD-RAM media have been used in computers as well as camcorders and personal video recorders since 1998.
..... Click the link for more information.
..... Click the link for more information.
HD DVD
Media type: High-density optical disc
Encoding: VC-1, H.264, and MPEG-2
Capacity: 15 GB (single layer) 30 GB (dual layer)
Read mechanism: 1x@36 Mbit/s & 2x@72 Mbit/s
Developed by: DVD Forum
..... Click the link for more information.
Media type: High-density optical disc
Encoding: VC-1, H.264, and MPEG-2
Capacity: 15 GB (single layer) 30 GB (dual layer)
Read mechanism: 1x@36 Mbit/s & 2x@72 Mbit/s
Developed by: DVD Forum
..... Click the link for more information.
Hard disk drive
An IBM hard disk drive with the metal cover removed. The platters are highly reflective.
Date Invented: September 13 1956
Invented By: An IBM team led by Reynold Johnson
Connects to:
..... Click the link for more information.
An IBM hard disk drive with the metal cover removed. The platters are highly reflective.
Date Invented: September 13 1956
Invented By: An IBM team led by Reynold Johnson
Connects to:
..... Click the link for more information.
Constant Linear Velocity (CLV) describes the motion of a body with a constant linear velocity. This type of motion can occur in certain methods of writing or reading information from a rotating data disk.
..... Click the link for more information.
..... Click the link for more information.
This article is copied from an article on Wikipedia.org - the free encyclopedia created and edited by online user community. The text was not checked or edited by anyone on our staff. Although the vast majority of the wikipedia encyclopedia articles provide accurate and timely information please do not assume the accuracy of any particular article. This article is distributed under the terms of GNU Free Documentation License.
Herod_Archelaus
