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Original SCSI storage interface
Parallel SCSI (formally, SCSI Parallel Interface, or SPI) is the earliest of the interface implementations in the SCSI family. SPI is a parallel bus; there
Parallel_SCSI
Set of computer and peripheral connection standards
defines command sets for specific peripheral device types. The initial Parallel SCSI was most commonly used for hard disk drives and tape drives, but it
SCSI
Electrical connector used for SCSI
less so. Parallel SCSI allows for attachment of up to 8 devices (8-bit Narrow SCSI) or 16 devices (16-bit Wide SCSI) to the SCSI bus. The SCSI Host controller
SCSI_connector
Point-to-point serial protocol for enterprise storage
drives, solid-state drives and tape drives. SAS replaces the older Parallel SCSI (Parallel Small Computer System Interface, usually pronounced "scuzzy") bus
Serial_Attached_SCSI
Computer bus used for data storage systems
including parallel ATA (PATA, also called IDE or EIDE; described before the introduction of SATA as ATA), Serial ATA (SATA), SCSI, Serial Attached SCSI (SAS)
Hard_disk_drive_interface
Controller for disk storage, usually integrated into the drive
disks use Parallel SCSI, Fibre Channel or Serial Attached SCSI. The peripheral controller integrated on PATA (IDE), Serial ATA, Parallel SCSI or Serial
Disk_controller
Endpoint that initiates a SCSI command
In computer data storage, a SCSI initiator is the endpoint that initiates a SCSI session, that is, sends a SCSI command over a network. The initiator
SCSI_initiator_and_target
Computer storage interface standard
set of features from SCSI which the ATA version attempts to emulate. However, support for these is extremely rare in actual parallel ATA products and device
Parallel_ATA
Computer hardware device
In a typical parallel SCSI subsystem, each device has assigned to it a unique numerical ID. As a rule, the host adapter appears as SCSI ID 7, which gives
Host_adapter
Data transfer channel connecting parts of a computer
System Interface (SCSI), Hard disk drive and tape drive peripheral attachment bus Serial Attached SCSI (SAS) and other serial SCSI buses Thunderbolt Yapbus
Bus_(computing)
implement the SCSI protocol might not permit the use of all 64 bits. For example, older parallel SCSI permits 8 tag bits, SAS permits 9 tag bits, iSCSI permits
Tagged_Command_Queuing
SCSI Enclosure Services (SES) is a protocol for more modern SCSI enclosure products. An initiator can communicate with the enclosure using a specialized
SCSI_Enclosure_Services
Removable cartridge disk storage system
drive with both SCSI and IEEE 1284 connections; SCSI ID limited to ID 5 and 6). Parallel port external Zip drives are actually SCSI drives with an integrated
Zip_drive
Method of data transmission in which bits are conveyed in parallel
Model 44 had a 32-bit width. Legacy computer peripheral buses: ISA, ATA, SCSI, PCI, and the once-ubiquitous IEEE-1284 / Centronics "printer port" Laboratory
Parallel_communication
Serial bus interface standard
applications. Apple intended FireWire to be a serial replacement for the parallel SCSI bus, while providing connectivity for digital audio and video equipment
FireWire
Computer storage device with no moving parts
by SATA due to higher data transfer rates and greater reliability. Parallel SCSI: An interface primarily used in servers, with speeds ranging from 40
Solid-state_drive
Internet Protocol-based storage networking standard for linking data storage facilities
Interface (iSCSI; /aɪˈskʌzi/ eye-SKUZ-ee) is an Internet Protocol-based storage networking standard for linking data storage facilities. iSCSI provides block-level
ISCSI
(SCSI ID or PID). A SCSI device can have an optional SCSI device name which must be unique within the SCSI domain in which the SCSI device has SCSI ports
SCSI_architectural_model
Electro-mechanical data storage device
interface cables such as SATA (Serial ATA), USB, SAS (Serial Attached SCSI), or PATA (Parallel ATA) cables. The first production IBM hard disk drive, the 350
Hard_disk_drive
Wide and flat cable with multiple conductors
connector - used for 36-pin printer ports (IEEE 1284 - Centronics) and 50-pin SCSI ports. DIN 41612 connector – used for Eurocard buses. PCB transition headers
Ribbon_cable
l3I-1986 SCSI-1 protocol, implementing the eight bit parallel SCSI bus and eight bit host data bus transfers. The 53CF94 and 53CF96 added SCSI-2 support
NCR_53C9x
Computer bus interface for storage devices
slower 1.5 Gbit/s speed. Parallel SCSI uses a more complex bus than SATA, usually resulting in higher manufacturing costs. SCSI buses also allow connection
SATA
Topics referred to by the same term
Queensland Academy of Sport Quick arbitration and selection, as used in Parallel SCSI interfaces Queen Alexandra's Royal Army Nursing Corps (QAs) Quaternary
QAS_(disambiguation)
Computer bus used on VAX computers
more suitable for use in office environments. DSSI was superseded by Parallel SCSI. It was introduced in 1988 and has a bandwidth of 32 Mbit/s (4 MB/sec)
Digital Storage Systems Interconnect
Digital_Storage_Systems_Interconnect
Data storage connected directly to a computer
DAS. The main protocols used for DAS connections are Parallel ATA, SATA, eSATA, NVMe, Parallel SCSI, SAS, USB, and IEEE 1394. Most functions found in modern
Direct-attached_storage
one of a number of different sources, for example when terminating a parallel SCSI bus, a very simple circuit like this can be used: In digital electronics
Diode-or_circuit
Group of electrical connectors specifically aligned
host adapter and the backplane. Alternatively SCSI Enclosure Services can be used. With Parallel SCSI subsystems, SAF-TE is used. A single-board computer
Backplane
Network which provides access to consolidated, block-level data storage
Serial Attached SCSI (SAS) and Serial ATA (SATA) technologies. SAS evolved from SCSI direct-attached storage. SATA evolved from Parallel ATA direct-attached
Storage_area_network
Transmission line impedance matching
terminator. All parallel SCSI units use terminators. SCSI is primarily used for storage and backup. An active terminator is a type of single-ended SCSI terminator
Electrical_termination
Defunct American removable storage manufacturer
internal version was available with IDE or SCSI interfaces. The external version was available with parallel, SCSI, USB, or FireWire interfaces. This removable-disk
Orb_Drive
Second generation of personal computers by IBM
cables similar to the floppy drives. Later models used DBA ESDI or Parallel SCSI. Typically, desktop PS/2 models only permitted use of one hard drive
IBM_PS/2
Computer interface
players required a parallel port connection for transferring songs to the device. Adapters were available to run SCSI devices via parallel. Other devices
Parallel_port
Specification for expansion and memory cards
other way to connect peripherals to a laptop computer was via RS-232 and parallel ports of limited performance, so it was widely adopted for many peripherals
ExpressCard
Device that manages disk drives
they initially required expensive Parallel SCSI hard drives and aimed at the server and high-end computing market. SCSI technology advantages include allowing
Disk_array_controller
Antiquated computer port
parallel port Printer, scanner, removable media USB, Wi-Fi, Ethernet External parallel SCSI Removable media USB, Thunderbolt, Serial Attached SCSI AT
Legacy_port
American computer storage company
founded Adaptec in 1981. At first, Adaptec focused on devices with Parallel SCSI interfaces. Popular host bus adapters included the 154x/15xx ISA family
Adaptec
Computer storage product
connected to external disk enclosures via parallel SCSI, while modern models (as of 2009[update]) use SCSI over Fibre Channel and SAS. While most large-storage
NetApp_FAS
Concept in computing
other hot-swap components in the system. This was a problem for early parallel SCSI disk-drives. One common design solution is to protect bussed signal
Hot_swapping
Intel bus for connecting CPU and I/O chipset
ST-506 ESDI SDI IPI SMD Floppy connector Parallel ATA (PATA) Bus and Tag DSSI HIPPI Serial ATA (SATA) SCSI Parallel SAS ESCON Fibre Channel SSA SATAe PCI
Direct_Media_Interface
Disk format and access using sector sizes larger than 512 bytes
2020. Most disk drives use 512-byte sectors. [...] Enterprise drives (Parallel SCSI/SAS/FC) support 520/528 byte 'fat' sectors. Mueller, Scott (2013). Upgrading
Advanced_Format
Type of wiring used for communications
Twisted ribbon cable used for Parallel SCSI connections
Twisted_pair
Misaligned timing signals from different paths
serial interfaces (e.g. Serial Attached SCSI or USB) are preferred over parallel interfaces (e.g. parallel SCSI).[citation needed] Clock drift Jitter Skewness
Clock_skew
Device driver out-of-order processing technique for storage controllers
practical implementations use far fewer. Serial Attached SCSI (SAS), which replaced parallel SCSI in most enterprise environments, retains Tagged Command
Tagged_queuing
Computer bus standard
their Sun-1 and Sun-2 workstations. Sun built custom-designed CPU, memory, SCSI, and video display boards, and then added 3Com Ethernet networking boards
Multibus
Type of data transfer
and ports, transmitting data one bit at a time, include Serial ATA, Serial SCSI, Ethernet cable plugged into Ethernet ports, the Display Data Channel using
Serial_communication
Information transmission standard
operate: Fibre Channel Physical Interface specification Pictures of parallel SCSI connectors Pictures of SSA connectors Pictures of FC-AL connectors Archived
Fibre Channel electrical interface
Fibre_Channel_electrical_interface
Four-color laser printer
MHz Memory 12 MB–40 MB Slots 2 Read-only memory 4 MB Ports Serial, Parallel, SCSI, LocalTalk, Ethernet Power consumption 1100 Watts Color 4 Dots per inch
Color_LaserWriter
Computer storage enclosure industry standard
(abbreviated from SCSI Accessed Fault-Tolerant Enclosure) is an industry standard to interface an enclosure in-band to a (parallel) SCSI subsystem in order
SAF-TE
Computer data storage technology based on magnetic tape
contact to 180° (compared to 90° previously). Launch interfaces were Parallel SCSI and USB, with SAS interface released later. DAT 320 In November 2009
Digital_Data_Storage
Topics referred to by the same term
2020 Indian series Scams (TV series), a 2019 Japanese series SCAM – Parallel SCSI Configured Automatically Superconducting camera Scientific Certainty
Scam_(disambiguation)
Computer bus
HIPPI usage dwindled in the late 1990s. This was partly because Ultra3 SCSI offered rates of 320 MB/s and was available at almost any computer store
HIPPI
Featured a SCSI interface, a serial port, parallel port, floppy drive interface and a built-in menu system. SupraDrive - an early SCSI disk drive. Karin
Parallel_Bus_Interface
Virtual machine software for Mac
Coherence, as well as the overall look and feel of Parallels Desktop for Mac has only changed slightly. Also, SCSI support has not been implemented. It is currently
Parallels_Desktop_for_Mac
Type of computer disk storage drive
communicate using the SCSI protocol commands on software level as per the ATA Package Interface standard developed for making Parallel ATA/IDE interfaces
Optical_disc_drive
Protocol that carries SCSI commands over Parallel ATA
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
ATAPI
Type of electrical connector
HP-IB) interface 36-pin connector: IEEE 1284 parallel interface 50-pin connector: SCSI-1 interface (SCSI connector) 50-pin connector: RJ21X "telco connector"
Micro_ribbon_connector
Computerized hardware
port Serial port Cable DE-9 VGA connector VGA port Cable D-sub 15 SCSI SCSI ports SCSI cables Source: USB USB Ports USB Cables Audio and video connector
Computer_port_(hardware)
Type of command for solid-state drive
A trim command (known as TRIM in the ATA command set, and UNMAP in the SCSI command set) allows an operating system to inform a storage medium which blocks
Trim_(computing)
Computer workstation
wide SCSI connector on the rear of the Ultra 60. Two RS-232C/RS-423 serial ports using DB-25 connectors A 2 MB/s Centronics-compatible parallel port using
Ultra_60
Professional computer backup device
Traveller interface that connected it to a standard parallel port, and, later, a SCSI-USB adapter and SCSI-Firewire adapter. An ATA version of the drive was
Jaz_drive
Standard for parallel peripheral interfaces, known as the Centronics port
directly via parallel interface, network adapters and other devices. This removed the need for a separate SCSI card, as the built-in parallel interface could
IEEE_1284
disk-drive. An extra eighth signal called "-PARALLEL ESI" is used to switch the function of the SEL_n signals. A SCSI Send Diagnostic command or Receive Diagnostic
Enclosure_Services_Interface
Removable hard disk drive
The external drive was available with parallel or SCSI interfaces; the internal drive was available with IDE or SCSI interfaces. At introduction in 1995
SyQuest_EZ_135_Drive
Technical standard
to SCI. In addition, LVDS is the physical layer signaling in SCSI standards (Ultra-2 SCSI and later) to allow higher data rates and longer cable lengths
Low-voltage differential signaling
Low-voltage_differential_signaling
Removable floppy disk storage system
external SCSI connector. All versions of the Bernoulli Box II use a SCSI interface, but external drives can also be converted for use with a parallel port
Bernoulli_Box
licensed SCSI target software stack. The design goals of this software stack are high performance, high reliability, strict conformance to existing SCSI standards
SCST
Series of hard disk drives produced by Seagate Technology
introduced in 1993. The line initially focused on high-capacity, high-performance SCSI hard drives until introducing ATA models in 1999 and SATA models in 2002
Seagate_Barracuda
Series of computer workstations and servers
The DEC 3000 AXP used a TCDS (TURBOchannel Dual SCSI) ASIC to provide an interface between the SCSI controllers and the TURBOchannel bus. Early systems
DEC_3000_AXP
American computer hardware company
company was among the first to produce Small Computer System Interface (SCSI) device controller expansion cards, later controller ICs. It was acquired
Future_Domain
Free virtualization and emulation software
NVMe disk interface Serial port Parallel port PC speaker i440FX/PIIX3 or Q35/ICH9 chipsets PS/2 mouse and keyboard SCSI controller: LSI MegaRAID SAS 1078
QEMU
Computer storage networking technology
including SCSI, HIPPI and ESCON. Fibre Channel was designed as a serial interface to overcome limitations of the SCSI and HIPPI physical-layer parallel-signal
Fibre_Channel
Sequence of bits or bytes of a fixed size
directly attached via SCSI or Fibre Channel, or distant devices accessed via a storage area network (SAN) using a protocol such as iSCSI, or AoE. DBMSes often
Block_(data_storage)
Computer
71 MB SCSI disk and 20 MB 1/4" SCSI tape cost $29,300 (1986 US price list). A color 2/160 with 8 MB of memory, two 71 MB SCSI disks and 60 MB 1/4" SCSI tape
Sun-2
Distributed file system protocol
Specification RFC 7863 – NFS Version 4.2 Protocol XDR Description RFC 8154 – Parallel NFS - SCSI Layout Specification RFC 8166 – Remote Direct Memory Access Transport
Network_File_System
Type of decentralized filesystem
network may use any of a number of block-level protocols, including SCSI, iSCSI, HyperSCSI, ATA over Ethernet (AoE), Fibre Channel, network block device, and
Clustered_file_system
encoding SCSI-1, SCSI-2 and SCSI-3 are signaling protocols and do not explicitly refer to a specific rate. Narrow SCSI exists using SCSI-1 and SCSI-2. Higher
List_of_interface_bit_rates
Expansion card standard for laptop computers
(SCPH-3000x onwards). Before the introduction of the PCMCIA card, the parallel port was commonly used for portable peripherals. The PCMCIA 1.0 card standard
PC_Card
Bus standard for IBM PC compatible computers
such as disk access or networking. Most EISA cards produced were either SCSI or NIC cards. EISA was also available on some non-IBM-compatible machines
Extended Industry Standard Architecture
Extended_Industry_Standard_Architecture
Workstation computers
sockets occupied. All Indigo2 models can accommodate two 3.5" SCSI disk drives and one 5.25" SCSI CD-ROM drive inside bays on the front of the machine, using
SGI_Indigo2
Unique identifier used in storage technologies
storage technologies including Fibre Channel, Parallel ATA, Serial ATA, SCSI and Serial Attached SCSI (SAS). A WWN may be employed in a variety of roles
World_Wide_Name
Personal computer by Commodore
Chip Set (ECS), a display enhancer for use with a VGA monitor, and a DMA SCSI-1 controller and hard disk drive. "Fast RAM" can be increased by fitting
Amiga_3000
1987 home computer
Expansion (2 slots) External FDD (up to 2) SASI/SCSI (depending on model) RS232 serial port Parallel port Headphone and microphone ports Floppy Drives:
X68000
Local computer bus for attaching hardware devices
2000). "Adaptec SCSI Card 29160 Ultra160 SCSI Controller User's Reference" (pdf). p. 1. Retrieved July 13, 2012. Although the Adaptec SCSI Card 29160 is
Peripheral Component Interconnect
Peripheral_Component_Interconnect
Computer workstation
Centronics-compatible parallel port using a 25-pin D connector Standard mini DIN-8 connector for Sun keyboard/ Sun mouse External ultra wide 68-pin SCSI connector
Ultra_80
Storage connectivity product manufacturer
host bus adapters, protocol conversion bridges, storage controllers, MacOS iSCSI initiator software and acceleration software with storage interface connectivity
ATTO_Technology
1992 personal computer
(AGA) chipset with enhanced graphics. The SCSI system from previous Amigas was replaced by the lower-cost Parallel ATA. The original A4000 is housed in a
Amiga_4000
Technology used in network interface cards
overhead associated with Internet Protocol (IP) storage protocols such as iSCSI and Network File System (NFS). Originally TCP was designed for unreliable
TCP_offload_engine
Gateway, which provided multi-directional bridging between multiple Parallel SCSI ports and multiple Fibre Channel ports. IBM teamed with Pathlight to
Pathlight_Technology
Type of electrical connector
DD-50 connectors for Fast-SCSI equipment. As SCSI variants from Ultra2 onwards used differential signaling, the Macintosh DB-25 SCSI interface became obsolete
D-subminiature
Personal computer from Commodore, 1987
AutoConfig standard, such as, graphic, sound, and network cards and Parallel ATA, SCSI and USB controllers. The ISA slots can be activated by use of a bridgeboard
Amiga_2000
Series of microprocessors
which contains a Ethernet Controller, CPU, Memory Interface, SCSI controller, and parallel and serial I/O. In 1997, Axis introduced the ETRAX 100 SoC which
ETRAX_CRIS
Software interface to attached devices
Fast/wide SCSI controller hme: Fast (10/100 Mbit/s) Ethernet isp: Differential SCSI controllers and the SunSwift card glm: (Gigabaud Link Module) UltraSCSI controllers
Device_driver
Relationship between devices in which one controls the other
replication – Method of database replication SCSI initiator and target – Endpoint that initiates a SCSI command "Master–slave terminology alternatives
Master–slave_(technology)
Canadian computer researcher
secure disks, a precursor to the SCSI object storage device command set. Gibson was the initial director of the Parallel Data Laboratory at Carnegie Mellon
Garth_Gibson
Connection standard for electronic musical instruments
mLan products have been released since 2007. SCSI Musical Data Interchange (SMDI) is a method of using SCSI to transfer information between samplers and
MIDI
Series of hardware design requirements and recommendations
(8P8C) female Various Printer Various SCSI SCSI connector Landline/Modem RJ11 female Serial port 9-pin D male Parallel port 25-pin D female Video Analog monitor
PC_System_Design_Guide
Computer expansion bus standard
trend toward replacing parallel buses with serial interconnects; other examples include Serial ATA (SATA), USB, Serial Attached SCSI (SAS), FireWire (IEEE
PCI_Express
1994 Sun Microsystems workstation
VSIMM cards. The SPARCstation 20 has two internal SCA bays, an external SCSI connector, and two bays for CD-ROM or floppy drives. Earlier revisions of
SPARCstation_20
Former subsidiary of Philips
drive CM 121: 1× speed CM 221: 1× speed CM 225: ?× speed External CD-ROMs, SCSI interface CDD 521: 2× speed CDD 522: 2× speed CDD 552: ?× speed CDD 2000:
Laser Magnetic Storage International
Laser_Magnetic_Storage_International
Custom chips used in Amiga computers
used on the A2090(A) ST-506/SCSI Controller and provides DMA management for the Konan DJC-002 (ST-506) and the WD33C93 SCSI controllers with byte-to-word
Amiga_custom_chips
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PARALLEL SCSI
PARALLEL SCSI
PARALLEL SCSI
PARALLEL SCSI
PARALLEL SCSI
PARALLEL SCSI
PARALLEL SCSI
PARALLEL SCSI
PARALLEL SCSI
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