This international standard defines the mechanical, electrical, timing, and protocol requirements of the<\/p>\n
SCSI parallel interface to allow conforming devices to interoperate. The SCSI parallel interface is a local<\/p>\n
I\/O bus that may be operated over a wide range of transfer rates. The objectives of the SCSI parallel<\/p>\n
interface are<\/p>\n
a) To provide host computers with device independence within a class of devices. Thus, different disk<\/p>\n
drives, tape drives, printers, optical media drives, and other devices may be added to the host<\/p>\n
computers without requiring modifications to generic system hardware. Provision is made for the<\/p>\n
addition of special features and functions through the use of vendor-specific options. Reserved areas<\/p>\n
are provided for future standardization.<\/p>\n
b) To provide compatibility such that properly conforming SCSI-2 devices may interoperate with<\/p>\n
SCSI-3 devices given that the systems engineering is correctly done. Properly conforming SCSI-2<\/p>\n
devices should respond in an acceptable manner to reject SCSI-3 protocol extensions. SCSI-3<\/p>\n
protocol extensions are designed to be permissive of such rejections and thus allow the SCSI-2<\/p>\n
devices to continue operation without requiring the use of the extension.<\/p>\n
The interface protocol includes provision for the connection of multiple initiators (SCSI devices capable of<\/p>\n
initiating an I\/O process) and multiple targets (SCSI devices capable of responding to a request to perform<\/p>\n
an I\/O process). Distributed arbitration (i.e., bus-contention logic) is built into the architecture of SCSI. A<\/p>\n
default priority system awards interface control to the highest priority SCSI device that is contending for<\/p>\n
use of the bus and an optional fairness algorithm is defined.<\/p>\n
This standard defines the physical attributes of an input\/output bus for interconnecting computers and<\/p>\n
peripheral devices.<\/p>\n
Figure 1 is intended to show the general structure of SCSI standards. The figure is not intended to imply a<\/p>\n
relationship such as a hierarchy, protocol stack, or system architecture.<\/p>\n
Common Access Method<\/p>\n<\/p>\n<\/p>\n<\/p>\n
Figure 1 – General Structure of SCSI<\/b><\/p>\n
This international standard is intended as an alternate to the SCSI-3 Parallel Interface Standard. This<\/p>\n
international standard, in addition to containing all the information in the SCSI-3 Parallel Interface Standard<\/p>\n
contains information and specifications for LVD and fast-40 along with many other improvements.<\/p>\n","protected":false},"excerpt":{"rendered":"
Information technology \u2014 Small Computer System Interface (SCSI) \u2014 Part 112: Parallel Interface-2 (SPI-2)<\/b><\/p>\n\n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n ISO<\/b><\/a><\/td>\n 2002-05<\/td>\n 111<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":632881,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[680,2634],"product_tag":[],"class_list":{"0":"post-632867","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-35-200","7":"product_cat-iso","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/632867","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/632881"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=632867"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=632867"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=632867"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}