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Adaptec also developed generic SCSI disk and CD-ROM drivers for DOS (ASPICD.SYS and ASPIDISK.SYS). [3]: 60–61 At least a couple of other programming interfaces for SCSI device drivers competed with ASPI in the early 1990s, including CAM (Common Access Method), developed by Apple; and Layered Device Driver Architecture, developed by Microsoft.
At first, Adaptec focused on devices with Parallel SCSI interfaces. Popular host bus adapters included the 154x/15xx ISA family, the 2940 PCI family, and the 29160/-320 family. Their cross-platform ASPI was an early API for accessing and integrating non- disk devices like tape drives , scanners and optical disks .
Windows: Advanced SCSI Programming Interface (ASPI) by Adaptec, Nero AG and Pinnacle Systems [4] ASAPI by VOB Computersysteme GmbH and Pinnacle Systems; ElbyCDIO by Elaborate Bytes; Patin-Couffin by VSO Software; SCSI Pass-Through Direct (SPTD) by Duplex Secure, Ltd. The SCSI pass-through driver for Linux is called "SCSI generic" (sg) [5]
Diagrams of different Parallel SCSI symbols [1]. Parallel SCSI is not a single standard, but a suite of closely related standards. There are a dozen SCSI interface names, most with ambiguous wording (like Fast SCSI, Fast Wide SCSI, Ultra SCSI, and Ultra Wide SCSI); three SCSI standards, each of which has a collection of modular, optional features; several different connector types; and three ...
The SCST core, a protocol-independent engine for processing SCSI commands. Target drivers which receive SCSI commands from a SCSI initiator, pass these SCSI to the SCST core and send back replies to the initiator. Storage drivers a.k.a. device handlers which interact with the storage medium.
USB Attached SCSI (UAS) or USB Attached SCSI Protocol (UASP) is a computer protocol used to move data to and from USB storage devices such as hard drives (HDDs), solid-state drives (SSDs), and thumb drives. UAS depends on the USB protocol, and uses the standard SCSI command set.
Evolved by ANSI into SCSI (SASI is a compatible subset of the first version of SCSI). ST-506 ST-412 ST-412RLL Bit serial data interfaces introduced by Seagate Technology beginning 1980. Standard interfaces for most small HDDs in the 1980s and early 1990s. SCSI: Small Computer System Interface Word serial interface sponsored by ANSI and ...
Key Code Qualifier is an error-code returned by a SCSI device. When a SCSI target device returns a check condition in response to a command, the initiator usually then issues a SCSI Request Sense command. This process is part of a SCSI protocol called Contingent Allegiance Condition.