參數(shù)資料
型號(hào): LSIFC909
英文描述: LSIFC909 Fibre Channel I/O Processor technical manual v2.1 8/00
中文描述: LSIFC909光纖通道I / O處理器技術(shù)手冊2.1 8 / 00
文件頁數(shù): 36/144頁
文件大?。?/td> 1496K
代理商: LSIFC909
3-6
LSIFC909 Overview
Figure 3.2
LSIFC909 Message Flow
3.4 SCSI Message Class
The SCSI message interface provides the most direct interface for
block-oriented storage media. This includes disk drives and tape devices.
The SCSI I/O path translates a SCSI CDB into an FCP exchange. The
LSIFC909 completely manages all FC device and target discovery
operations. FC target devices are assigned a logical (bus, target ID)
identifier, and are accessed by the system as if they were parallel SCSI
devices. The system is responsible for scanning the target devices, and
identifying LUNs on the target devices.
In general, the system is responsible for retrying operations at an I/O
request level. The LSIFC909 is responsible for responding to bus
protocol specific errors and exceptions and retrying bus sequences
within the scope of an I/O operation. The system is also responsible for
maintaining a timer for SCSI I/O operations if this is required by the host
system. The host driver may use the provided SCSI task management
functions to terminate one or more I/O operations when a time-out
occurs. For more information regarding the SCSI message class, refer to
the LSI Logic LSIFC909 Programming Guide
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