Impact of HPPI and fibre channel standards on data delivery

[1990] Digest of papers. Tenth IEEE Symposium on Mass Storage Systems@m_Crisis in Mass Storage Pub Date : 1990-05-07 DOI:10.1109/MASS.1990.113593

P. Savage

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Abstract

Two ANSI X3T9.3 standards activities are discussed. HPPI (high performance parallel interface) is a simple electrical point-to-point device that is implementable at either 100 or 200 MB. A HPPI channel is unidirectional; only a few return wires are used for flow control by the destination. There are no means for retransmitting after error, although the data is protected by adequate parity and longitudinal redundancy bits. Error bursts are delivered with status=error, or optionally dropped in the bit bucket, and any corrective action must be initiated by an upper-layer protocol. Thus, HPPI provides a datagram service. The fiber channel standardization project is a direct response to the need to extend the range of SCSI, IPI, and HPPI, all of which are electrical systems. Accordingly, the fiber channel standards working group established a goal of defining implementations that will accommodate SCSI, IPI, and HPPI within a common compatible lower-level set of protocols. It appears that other important transmission protocols can be modulated/carried on the fiber channel; examples are BlockMux channel and FDDI.<>

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HPPI和光纤通道标准对数据传输的影响

讨论了两个ANSI X3T9.3标准活动。HPPI(高性能并行接口)是一种简单的电点对点设备，可实现在100或200 MB。HPPI通道是单向的;只有少数返回线用于目的地的流量控制。虽然数据有足够的奇偶校验和纵向冗余位保护，但在发生错误后没有办法重新传输。错误突发以status= Error发送，或者可选地在位桶中丢弃，任何纠正行动必须由上层协议发起。因此，HPPI提供了数据报服务。光纤通道标准化项目是对扩展SCSI、IPI和HPPI范围的需求的直接响应，所有这些都是电气系统。因此，光纤通道标准工作组建立了一个目标，即定义在通用兼容的低级协议集内容纳SCSI、IPI和HPPI的实现。似乎其他重要的传输协议也可以在光纤信道上调制/承载;例如BlockMux通道和FDDI。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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[1990] Digest of papers. Tenth IEEE Symposium on Mass Storage Systems@m_Crisis in Mass Storage

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