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Quarter-inch Cartridge
Quarter inch cartridge tape (abbreviated QIC, commonly pronounced "quick") is a magnetic tape data storage format introduced by 3M in 1972, with derivatives still in use as of 2016. QIC comes in a rugged enclosed package of aluminum and plastic that holds two tape reels driven by a single belt in direct contact with the tape. The tape was originally wide and anywhere from long. Data is written linearly along the length of the tape in one track (mostly on pre-1980 equipment), or written "serpentine", one track at a time, the drive reversing direction at the end of the tape, and each track's data written in the opposite direction to its neighbor. Since its introduction, it has been widely used, and many variations exist. There is a QIC trade association that publishes QIC standards which include interfaces and logical formats. To a very large extent it was the efficiency and openness of this organization which encouraged hardware and software developers to use this type of drive an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Tape Data Storage
Magnetic-tape data storage is a system for storing digital information on magnetic tape using digital recording. Tape was an important medium for primary data storage in early computers, typically using large open reels of 7-track, later 9-track tape. Modern magnetic tape is most commonly packaged in cartridges and cassettes, such as the widely supported Linear Tape-Open (LTO) and IBM 3592 series. The device that performs the writing or reading of data is called a tape drive. Autoloaders and tape libraries are often used to automate cartridge handling and exchange. Compatibility was important to enable transferring data. Tape data storage is now used more for system backup, data archive and data exchange. The low cost of tape has kept it viable for long-term storage and archive. Open reels Initially, magnetic tape for data storage was wound on reels. This standard for large computer systems persisted through the late 1980s, with steadily increasing capacity due to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Run Length Limited
Run-length limited or RLL coding is a line coding technique that is used to send arbitrary data over a communications channel with bandwidth limits. RLL codes are defined by four main parameters: ''m'', ''n'', ''d'', ''k''. The first two, ''m''/''n'', refer to the rate of the code, while the remaining two specify the minimal ''d'' and maximal ''k'' number of zeroes between consecutive ones. This is used in both telecommunication and storage systems that move a medium past a fixed recording head. Specifically, RLL bounds the length of stretches (runs) of repeated bits during which the signal does not change. If the runs are too long, clock recovery is difficult; if they are too short, the high frequencies might be attenuated by the communications channel. By modulating the data, RLL reduces the timing uncertainty in decoding the stored data, which would lead to the possible erroneous insertion or removal of bits when reading the data back. This mechanism ensures that the bounda ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apple Tape Backup 40SC
The Apple Tape Backup 40SC is an external, SCSI-interfaced, QIC, mini-cartridge tape drive. It was first introduced by Apple Inc. in 1987 and discontinued in 1994. The drive came bundled with Retrospect backup software. The drive is also compatible with the tape software included with A/UX. , By Don Crabb, InfoWorld, 3 Aug 1987, Page 43, ''...(Production units of the Apple Tape 40-SC were not available for testing.)...'' Technical specifications * Recording media: Industry-standard, DC 2000 QIC mini-cartridge. * Formatted capacity: 38.5 |
Advanced Technology Attachment
Parallel ATA (PATA), originally , also known as IDE, is a standard interface designed for IBM PC-compatible computers. It was first developed by Western Digital and Compaq in 1986 for compatible hard drives and CD or DVD drives. The connection is used for storage devices such as hard disk drives, floppy disk drives, and optical disc drives in computers. The standard is maintained by the X3/INCITS committee. It uses the underlying (ATA) and Packet Interface (ATAPI) standards. The Parallel ATA standard is the result of a long history of incremental technical development, which began with the original AT Attachment interface, developed for use in early PC AT equipment. The ATA interface itself evolved in several stages from Western Digital's original Integrated Drive Electronics (IDE) interface. As a result, many near-synonyms for ATA/ATAPI and its previous incarnations are still in common informal use, in particular Extended IDE (EIDE) and Ultra ATA (UATA). After the in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ATAPI
ATA Packet Interface (ATAPI) is a protocol that has been added to Parallel ATA and Serial ATA so that a greater variety of devices can be connected to a computer than with the ATA command set alone. It carries SCSI commands and responses through the ATA interface. ATAPI devices include CD-ROM and DVD-ROM drives, tape drives, magneto-optical drives, and large-capacity floppy drives such as the Zip drive and SuperDisk drive. Background ATA was originally designed for, and worked only with hard disks and devices that could emulate them. A group called the Small Form Factor committee (SFF) introduced ATAPI (ATA Packet Interface) ATA to be used for a variety of other devices that require functions beyond those necessary for hard disks. For example, any removable media device needs a "media eject" command, and a way for the host to determine whether the media is present, and these were not provided in the ATA protocol. The Small Form Factor committee approached this problem by de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Verbatim Corporation
Verbatim is a brand for storage media and flash memory products currently owned by CMC Magnetics Corporation (CMC), a Taiwanese company that is known for optical disc manufacturing. Formerly a subsidiary of Mitsubishi Chemical, the global business and assets of Verbatim were sold to CMC Magnetics in 2019 at an estimated price of $32 million USD. Originally an American company and known for its floppy disks in the 1970s and 1980s, Verbatim is now known for its recordable optical media. History The original Verbatim first started in Mountain View, California, in 1969, under the name Information Terminals Corporation, founded by Reid Anderson. It grew quickly and became a leading manufacturer of floppy disks by the end of the 1970s, and it was soon renamed Verbatim. In 1982, it formed a floppy disk joint venture with Japanese company Mitsubishi Kasei Corporation (forerunner of Mitsubishi Chemical Corporation), with the joint venture called Kasei Verbatim. Verbatim mostly strugg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sony
, commonly stylized as SONY, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan. As a major technology company, it operates as one of the world's largest manufacturers of consumer and professional electronic products, the largest video game console company and the largest video game publisher. Through Sony Entertainment Inc, it is one of the largest music companies (largest music publisher and second largest record label) and the third largest film studio, making it one of the most comprehensive media companies. It is the largest technology and media conglomerate in Japan. It is also recognized as the most cash-rich Japanese company, with net cash reserves of ¥2 trillion. Sony, with its 55 percent market share in the image sensor market, is the largest manufacturer of image sensors, the second largest camera manufacturer, and is among the semiconductor sales leaders. It is the world's largest player in the premium TV market f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tandberg Data
Tandberg Data GmbH is a company focused on data storage products, especially streamers, headquartered in Dortmund, Germany. They are the only company still selling drives that use the QIC (also known as SLR) and VXA formats, but also produce LTO along with autoloaders, tape libraries, NAS devices, RDX Removable Disk Drives, Media and Virtual Tape Libraries. Tandberg Data used to manufacture computer terminals (e.g. TDV 2200), keyboards, and other hardware. They have offices in Dortmund, Germany; Tokyo, Japan; Singapore; Guangzhou, China and Westminster, Colorado, U.S. History * Tandberg radio factory was founded in Oslo on January 25, 1933 by Vebjørn Tandberg. * In 1970, Tandberg produces its first data tape drives. * In December 1978, Tandbergs Radiofabrikk goes bankrupt. * In January 1979, Siemens and the state of Norway establish Tandberg Data, rescuing the data storage and computer terminal divisions from the ashes. Siemens holds 51% of the new company and controls ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scalable Linear Recording
Scalable Linear Recording is the name used by Tandberg Data for its line of QIC based tape drives A tape drive is a data storage device that reads and writes data on a magnetic tape. Magnetic tape data storage is typically used for offline, archival data storage. Tape media generally has a favorable unit cost and a long archival stability. A .... The earliest SLR drive, the SLR1, has a capacity of 250 MB, while the latest drive, the SLR140, has a capacity of 70 GB. The term SLR is often used to refer to QIC tapes, as for many years they were the only drives that used them before Tandberg discontinued production around 2015. Generations Quarter inch formats ''NOTE:'' MLR stands for Multi-channel Linear Recording. Eight millimeter formats External links SLR5 specsheetSLR7 specsheetSLR24 specsheetSLR32 specsheetSLR40 specsheetSLR50 specsheetSLR60 specsheetSLR75 specsheetSLR100 specsheetSLR140 specsheet Tandberg {{Compu-storage-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Personal Computer
A personal computer (PC) is a multi-purpose microcomputer whose size, capabilities, and price make it feasible for individual use. Personal computers are intended to be operated directly by an end user, rather than by a computer expert or technician. Unlike large, costly minicomputers and mainframes, time-sharing by many people at the same time is not used with personal computers. Primarily in the late 1970s and 1980s, the term home computer was also used. Institutional or corporate computer owners in the 1960s had to write their own programs to do any useful work with the machines. While personal computer users may develop their own applications, usually these systems run commercial software, free-of-charge software (" freeware"), which is most often proprietary, or free and open-source software, which is provided in "ready-to-run", or binary, form. Software for personal computers is typically developed and distributed independently from the hardware or operating sys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Travan
Travan is an 8 mm magnetic tape cartridge design developed by the 3M company, used for the storage of data in computer backups and mass storage. Over time, subsequent versions of Travan cartridges and drives have been developed that provide greater data capacity, while retaining the standard 8 mm width and 750' length. Travan is standardized under the QIC body. HP Colorado, Iomega DittoMax and AIWA Bolt are proprietary versions of the Travan format. The Travan format competed mainly against the DDS, AIT, and VXA formats. Generations TR-1 * Travan TR-1 cartridges offer a 400 MB native capacity with a 0.25 MB/s transfer rate using the QIC-80 media format. TR-2 * TR-2 was designed by 3M, but they never marketed it. * TR-2 cartridges were designed to have an 800 MB native capacity with a 0.25 MB/s transfer rate using the QIC-3010 media format. * The spec called for 50 tracks across the tape, with a recording density of 22,125 flux transitions per inch (ftpi). TR-3 * Travan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Travan Tape Cartridge, Dell
Travan is an 8 mm magnetic tape cartridge design developed by the 3M company, used for the storage of data in computer backups and mass storage. Over time, subsequent versions of Travan cartridges and drives have been developed that provide greater data capacity, while retaining the standard 8 mm width and 750' length. Travan is standardized under the QIC body. HP Colorado, Iomega DittoMax and AIWA Bolt are proprietary versions of the Travan format. The Travan format competed mainly against the DDS, AIT, and VXA formats. Generations TR-1 * Travan TR-1 cartridges offer a 400 MB native capacity with a 0.25 MB/s transfer rate using the QIC-80 media format. TR-2 * TR-2 was designed by 3M, but they never marketed it. * TR-2 cartridges were designed to have an 800 MB native capacity with a 0.25 MB/s transfer rate using the QIC-3010 media format. * The spec called for 50 tracks across the tape, with a recording density of 22,125 flux transitions per inch (ftpi). TR-3 * Travan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
