Archives are for the long-term, systematic and static safekeeping of documents. For this purpose documents are stored in an unalterable way (digital media are e.g. WORM data carriers). Fully automatic handling equipments, so-called jukeboxes, are used to manage larger amounts of optical media. TERASTORE jukeboxes are able to run up to 2 500 optical media in a single system.

Data safeguarding as storage on external media (streamer, CD-R, WORM,, hard disk). Backups should be made at regular intervals to prevent data loss.

Code generation by which, according to determined patterns, graphically represented data information is transformed in digits or letters, and vice versa. Benefits in connection with jukeboxes:

Capture of content of a data carrier as fast as possible,
Allocation of the media in a secure and comfortable way,
No avoidable stress for the drives.

In TERASTORE jukeboxes the bar code reader is integrated into the dual picker. This allows, particularly in large TERASTORE jukeboxes, a fast building up of the allocation status listing by rapid scanning of the slots.

The control panel of TERASTORE jukeboxes consists of three components:

TERASTORE jukeboxes are constructed to be easily be expanded or cascaded by external lining up.

A special intermediate data storage buffer with very short access time for frequently used data. During the jukebox operation the cache is located either on the serveror on the Raid-system.

A case for CD-ROM / CD-R media that usually can be opened and utilized for operation of jukeboxes. Caddies and cartridges provide a optimum surface protection for the sensitive data carriers and armours them against the high charge during the robotic operations.

A case for DVD-RAM, 5¼'' and 12'' media that usually can be opened and utilized for jukebox operations. Caddies and cartridges provide an optimum surface protection for the sensitive data carriers and armours them against the high charge during the robotic operations.

The external expandability (" cabinet to cabinet ") lets TERASTORE jukeboxes of the 7x series (7x00, DCR7x, MIX7x) increase to a capacity of approx. 2,500 media in a single system. TERASTORE Jukeboxes of the series 100-2000 for 12 " media are also constructed according to the principles of cascadability.

Abbrev. for Compact Disk, optical data medium - industrially manufactured read-only storage medium. Originally developed by PhilipsTM und Sony TM as audio-CD.

 

Abbrev. for Compact Disk-Recordable, optical data carrier that can be recorded only one time; applying the data to CD-Rs is not comparable to the master-pressing of CD-ROMs. The CD-R's layer contains an organic component. Thus the long-term stability of CD-Rs is substantially lower than that of CD-ROMs or other optical data carriers (5 ¼ '', 12 '' MOs).

Abbrev. for Compact Disk Read-Only Memory, optical media produced in a master-pressing process; it can only be read.

Abbrev. for Compact Disk-Rewriteable - CD that can be recorded several times; as for the long-term-stability see CD-R.

Abbrev. for Communauté Européenne (European community) - The CE-check standardizes the electromagnetic disturbance quality control und the compatibility of electric devices. A product certificated by the CE can freely be traded in the entire European market. In order to gain this certificate TERASTORE jukeboxes have to pass a series of tests throughout the complete production cycle.

Abbrev. for Coded Information - coded characters, i.e. characters (contrary to Not Coded picture or language Information(NCI)) that can directly be interpreted and processed by computers. Coded information is usually represented by extended character sets e.g. ASCII, EBCDIC or others.

Hard- or software component, that demands upon services of a server, but does not offer to use them.

Computer Output to Laser Disk - Ve Abbrev. for Computer Output to Laser Disks - procedures for mass data archiving on digital optical disks. COLD systems (part of a DMS) receive files (via magnetic tapes or file transfer), extract index data and store information. The data can be displayed format-faithfully by using overlays or background layouts.

A hardware configuration with devices connected among each other. The SCSI interface e.g. supports one Daisy Chain with up to seven devices.

Abbrev. for Data / Document Management System - DMS is for administration of files within networks. Access, administration and representation is a result of document features (document orientated). Substantial features are the formation of groups of documents, version management and self-describing document objects.

Documents are defined as data and documents, not only put down on paper or to microfilm, but also archived on digital data carrier. They can be recalled and processed separately or in connection with other documents.

TERASTORE jukeboxes support drives all marketable manufacturers. Depending upon the model series the jukebox is equipped with several optical drives.

A unit for one or two optical drives. TERASTORE jukeboxes can be equipped with up to 16 of such modules (32 drives).

TERASTORE high-end jukeboxes are as a standard equipped with dual pickers that simultaneously can receive two optical media (even of a different kind). The dual picker ensures media access as quickly as possible, and it provides operational stability. If one of the pickers should fail, the other takes care of its tasks.

Abbrev. for Digitally Versatile Disk, versatile usable disk type - optical media with a new, so far open standard for mass storages with a capacity substantially higher than a CD-ROM, but compared to the MO storage technology with a number of disadvantages.

Abbrev. for Digitally Versatile Disk Recordable; a DVD which can be recorded only once (it affords a particular CD writer); 4,7 Gbyte capacity.

Abbrev. for Digital Versatile Disk RAM; a recordable DVD, based on the phase change technology. The medium is stored in a cartridge (similar to the MO). Available at present is a one-sided type with 4,7 GByte and a double-sided type with 9,4 GByte (2x4,7 GByte).

Abbrev. for Digital Versatile Disk Read Only Memory; read-only memory in DVD format; 4.7 GByte capacity.

Abbrev. for Digitally versatile Disk Re-Writeable; recordable DVD with a capacity of 4.7 GByte, not yet available.

E-Mail

E-mail-addresses of DSM Handhabungssysteme GmbH & Co. KG:

Information	dsm@terastore.de
Sales	sales@terastore.de
Support	support@terastore.de
Sales Office Karlsruhe	immo.gathmann@terastore.de

For e-mails directly to one of our co-workers use the following specification: first name.surname@terastore.de (no umlaut)

This link directs you to a special e-mail form for completion, concerning your particular needs and your special requirements of environments.

 

EOD

Abbrev. for Erasable Optical Disk .

Fibre Channel (FC) is a special physical transfer mechanism. FCs are in use for e.g. networks (IP log) and mass storage systems (SCSI). This type of serial bus is designed for photoconductor and copper transmission cables. One of the major advantages of FC is its versatile configuration, from 2 devices up to networks with over 16 million users. Data transmission rates by 12.5 MB/s up to approximately 100 MB/s are intended for the FC technology. FC can bypass distances up to 10 kilometres. Further features are its flexibility (FC supports different topologies), the simplicity of the installation and the easy integration. This type of serial data communication makes it possible to receive all signals, dispatched trough the bus, in the given order and without any delay.

HVD

Abbrev. for High Voltage Differential SCSI.

Central process computer in networks, a host places its high computing and storage capacity at the disposal of other computers (Clients).

You can reach DSM's service and support under: +49(0)4488 / 7643-50.

Abbrev. for Hierarchical Storage Management - HSM serves the purpose of automatic file migration from fast (e.g. fixed disks) to slower, low-priced data storage units (e.g. optical disks in a jukebox). The migration criteria can individually be determined (e.g. by the access frequency of a file).

Abbrev. for Hyper Text Mark-up Language - independent standard for documents used in the Internet.

Abbrev. for Intelligent Character Recognition, a method for recognition of texts in NCI documents. In order to improve the recognition degree compared with conventional OCR techniques nowadays different sources of information are considered.

 

Interface - due to the individual configurableness of TERASTORE jukeboxes various hardware interfaces can be supplied if required. Drives e.g. can be attached separately (DSM standard for recording operation). TERASTORE's high end jukeboxes have both, SCSI and RS232 interfaces.

Abbrev. for International Organization for Standardization - international controlling body of national and international standardisation committees for quality guarantee with the objective to establish generally accepted standards for all technical subjects. ISO standards are usually adopted as European and national standards.

ISO quality standard to attain the comprehensibleness of in-plant processes, to optimise single process cycles, to improve the quality of products and services, to ensure consequent documentation etc.

ISO international standard concerning data storage on CD-ROM.

Disk exchange systems with integrated robotics for changing, storage and administration of optical storage media. TERASTORE jukeboxes allow access to almost unlimited quantities of archived data using all conventional drives.

 

Abbrev. for Liquid Crystal Display - it is integrated in the control panel of TERASTORE jukeboxes to indicate the operating performance.

LVD

Low Voltage Differential SCSI.

In connection with jukeboxes a mailbox denotes the media's input and output unit.

Transfer of information from one system to another, e.g. from fixed disks to optical storage media (see HSM).

Magneto Optical Disk, WORM or ROD - max. capacity currently 9.1GByte. The capacity depends upon the segmenting byte/sector (e.g. 4096b/s = 9,1/8,6 GByte). Via the direction of the single data points' (pixels) magnetic field and the angle of refraction deviating thereby, the laser receives by scanning the 0 / 1 information. MO media are almost insensitive for outside magnetic fields. The overwriting ability extends up to approximately 1.000.000 cycles (factor 10 larger than DVD). In comparison to the DVD technique the recording rate achieves data transfers four times as fast.

TERASTORE jukeboxes are internally structured according to an unit construction system. Mailbox-, slot- und drive modules enable a non-standard composition of the mass storage system. This makes it possible for DSM to offer special UPGRADE models. The exchange of individual modules (e.g. an additional drive module for a slot module) is realizable at the face. This qualifies the TERASTORE jukebox technique as an extremely flexible system.

Abbrev. for Mean Swaps Between Failure. Minimum number of load/discharge procedures, a jukebox can execute entirely and properly.

Abbrev. for Non Coded Information. Such non coded information are pictures, speech, sound, video etc. which a computer can not process directly. A characteristic application is e.g. the graphic acquisition of documents with scanners.

Peripheral device with integrated, networkable server. TERASTORE jukeboxes are available as net ready systems.

Abbrev. for Optical Character Recognition. Method for conversion of text in raster format (NCI) into a coded character sequence (CI) recognizable for computers.

Optical data carrier, recording disk, scanned or recorded optically using laser beams. Optical data carrier are 5 ¼" MO and WORM, 12 " WORM, CD and DVD. Optical recording disks offer in particular the advantages of contactfree sampling and straight data access; they are fast and on a long-term basis stable.

 

The phase change technology is a method exclusively optical. The recording layer can take up structures amorphously (unstructured) and in a crystalline way (arranged). The hitting laser light is thereby reflected differently. True WORM media (physically not changeable, irreversibly) can also be created by means of the phase change technology. The max. storage capacity is 1,5 GByte per medium.

Abbrev. for Redundant Array of Independent Disks; error-tolerant method to improve data security of magnetic disk storage.

RS232 is a serial interface, this interface is used for comfortable maintenance by TERASTORE jukeboxes to communicate with external input units.

Abbrev. for Re-writeable Magneto Optical Disk; repeatedly recordable and readable MO.

Abbrev. for Small Computer Systems Interface; originally parallel 8 bit I/O bus, later furthermore serially defined for the link of peripheral devices of all kinds. The original type called SCSI-1 is no longer in use. It was replaced by the so-called SCSI-2-Interface. The SCSI 2-Norm includes additional instructions (e.g. for controlling the jukeboxes) and enables a faster transfer rate (10 Mbyte/s with a 8 bit bus - also called Fast SCSI, 20 MByte/s with a 16 bit bus - called Fast Wide SCSI). A further duplication of the clock rate lead to Ultra SCSI. Along with it came a duplication of the data transfer rate with simultaneous halving of the max. bus cable length to 1.5 m Single Ended or 12.5 m Differential Ended (HVD - High Voltage Differential). An active termination is prerequisite. By means of Ultra2 SCSI the transfer rate can once again be doubled (80Mbytes/s with a 16 bit wide bus). Because a further halving of the bus cable is not practicable, this standard is only defined as LVD (Low Voltage Differential). LVD is a differential cabling operating with a third of signal voltage. The max. cable length amounts to 12 meters.

Hardware or application, makes a certain service available, which can be used by the work stations (Clients), attached to the network.

Standard Generalized Markup Language; ISO standard for description of soft- and hardware independent document structures and - contents.

A unit for optical media. Depending upon the media type a module contains up to 7 slots. 6 Slots are available for 5¼" MO / WORM media, for CD / DVD and 7 Slots for 5¼" Phase Change media.

Universal disk format - a uniform, platform-independent file system laid out for all optical storage media, leaving behind particular restrictions of the ISO 9660.

TERASTORE jukeboxes are on request available as part-equipped upgrade models. These models have free space left, which can successively be filled up to the maximum configuration (later installation of slot modules or additional drives right by the enduser). The TERASTORE7x model series makes an external enlargement (cascading) by attaching further cabinets possible. So the system can be extended up to approx. slots 2,500 .

Write Once Read Many; optical medium - only once recordable, countlessly often readable - a distinction is to be made between Soft WORM (or WORM-MO; coded identification of the media, data theoretically changeable) and True WORM (invariable information, storage medium appropriate for revision-safe long-term archiving). DSM offers both 5¼ "and 12 " TERASTORE jukeboxes with True WORM media.

Soft WORM, only once recordable and frequently readable (data theoretically changeable). Capacity see MO. Ensured data security approx. 40 years.