Jukebox (information technology)
In the context of modern IT systems, jukebox refers to an archiving system for digital data that often has to meet extensive requirements in areas such as data security, protection against forgery (unchangeable storage media such as WORM , Ultra Density Optical and MiniDisc ) and data availability.
Functionality and use
An optical jukebox is a robotic data storage device that can automatically load and unload optical discs such as Compact Disc, DVD, Ultra Density Optical or Blu-ray Disc and provide terabytes (TB) or petabytes (PB) of tertiary storage. The devices are often referred to as optical disk libraries, robotic drives, or autochangers. Jukebox devices can have up to 2,000 disk slots and typically have an ejector that goes through the slots and drives. The arrangement of the slots and removal devices affects the performance, depending on the distance between a plate and the removal device. Search times and transmission rates vary depending on the optical technology used.
Jukeboxes are used in high capacity archive storage environments such as: B. in imaging, medicine and video. Hierarchical storage management is a strategy of moving underused or unused files from high-speed magnetic storage to optical jukebox devices in a process called migration. When the files are needed, they are migrated back to the magnetic disk. Optical disk libraries are also useful for making backups and in disaster recovery situations. One of the most important applications for jukeboxes today is archiving data. Archiving data differs from backups in that the data is stored on media that is designed to last up to 100 years. The data is usually written to WORM data carriers (WORM = Write Once Read Many) so that it cannot be deleted or changed.
Jukeboxes usually contain internal SCSI or SATA-based writable drives (CD-ROM, CD-R, DVD-ROM, DVD-R, DVD-RAM, UDO or Blu-ray) that are connected directly to a file server and managed by third party jukebox management software. This software controls the movement of the media within the jukebox and the pre-mastering of the data before the burn process.
Before the advent of the modern SAN and the much cheaper hard drives, high volume storage on DVD was cheaper than magnetic media. Jukebox capacities have risen sharply with the introduction of the 50 gigabyte (GB) dual layer Blu-ray (BD) format, with a roadmap to increase to eight layers and 200 GB per disk. The current format used in the DISC7000 allows 35 TB of storage from a single 700 disk jukebox. Optical disk libraries such as the TeraStack solution can store up to 142 TB of online and nearline data with a nominal power consumption of 425 watts. These two units show the great variance in product properties.
Individual evidence
- ↑ Here Electronics Introduces Blu-ray ™ Based TeraStack® Solution for Green Data Storage. Retrieved May 1, 2020 .
- ↑ Optical Jukeboxes: An Affordable Backup Plan For Your Business? Retrieved May 1, 2020 .
- ↑ HP StorageWorks 2200mx Optical Jukebox - MO disk library - SCSI Series Specs. Retrieved May 1, 2020 .