![]() Once a media has been placed in a drive from its home slot, many operations can be taken. Optical library management software handles all of the writing and reading of the filesystem content on the optical media. An example of this would be to move a media from slot 50 to the drive number 3. Any of these actions would require specific move commands sent from the management application to the optical library. Following this, the management software may request data off of a particular piece of media or it may wish to perform some write operations on it. Number and type of drives, number and status of slots and other essential information is gathered. When the management software is run, it will send inquiry requests to the optical library for the status of its contents. These commands are used for control and library geometry querying. The core functionality of optical library management software can be broken down into four parts: robotic control, filesystem authoring, file tracking, and access control.Īll optical libraries comply with the standard SCSI command set. The Zerras Icebox differs from Sony Optical Data Archive libraries is it uses approved standard dual, tri, and quad layer blu-ray discs rather than proprietary Archival Disc standard format which is not backward compatible to standard blu-ray drives and discs in the market. The optical storage archive library from Zerras allows up to 25TB of removeable optical storage in a single unit library with a power draw of 60 watts per unit and scale to 200TB in a 42U rack cluster. These two units show the wide variance of product attributes. Optical disc libraries like the TeraStack Solution can store up to 142 TB of online and nearline data with a nominal power draw of 425 watts. The current format, used in the DISC ArXtor7000 library, allows 89 TB of storage from a single 700-disc jukebox. Jukebox capacities have greatly increased with the release of the 128 gigabyte (GB) quad layer Blu-ray (BD) format, with a road-map to increase to eight layers and 200 GB per disc. ![]() This software controls the movement of media within the jukebox, and the pre-mastering of data prior to the recording process.īefore the advent of the modern SAN and much cheaper hard disks, high-volume storage on DVD was more cost-effective than magnetic media. Jukeboxes typically contain internal SCSI- or SATA-based recordable drives (CD-ROM, CD-R, DVD-ROM, DVD-R, DVD-RAM, UDO or Blu-ray) that connect directly to a file server and are managed by a third-party jukebox management software. The data is usually permanently written on Write Once Read Many (WORM)-type discs so it cannot be erased or changed. Archiving data is different from backups in that the data is stored on media designed to last up to 100 years. ![]() Today one of the most important uses for jukeboxes is to archive data. Optical disc libraries are also useful for making backups and in disaster recovery situations. If the files are needed, they are migrated back to magnetic disk. Hierarchical storage management is a strategy that moves little-used or unused files from fast magnetic storage to optical jukebox devices in a process called migration. Jukeboxes are used in high-capacity archive storage environments such data centers and on-premise server rooms to store long-term data such as imaging, medical, compliance records, video and other high-value data assets, objects, and files. It was produced to replace the 1/2 inch magnetic tape devices that were being used to store satellite data. The unit had twin read/write heads, 12" WORM disks and the carousels were pneumatically driven. One of the first examples of an optical jukebox was the unit designed and built at the Royal Aerospace Establishment at Farnborough, England. Seek times and transfer rates vary depending upon the optical technology used. The arrangement of the slots and picking devices affects performance and maintenance costs, depending on the robotics design, the space between a disk and the picking device. provides a removeable capsule that holds up to 200 discs per library which can be scaled-out to manage 1600 discs per 42U rack unit. Jukebox devices may have up to 2,000 slots for disks, and usually have a picking device that traverses the slots and drives. The devices are often called optical disk libraries, "optical storage archives", robotic drives, or autochangers. Not to be confused with Jukeboxes that use CDs instead of vinyl records.Īn 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 and can provide terabytes (TB) or petabytes (PB) of tertiary storage.
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