Table of Contents
Advertisement
Figure 3.2
LSIFC929 Message Flow
PCI Bus
1
3
Request Register
2
N
Request
Post
FIFO
3.3 SCSI Message Class
Operating System
1
7
Host Driver
MFD
6
3
Reply Register
4
IOC
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. All FC
device and target discovery operations are managed completely within
the LSIFC929. 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 LSIFC929 is responsible for responding to bus
SCSI Message Class
Copyright © 2000, 2001 by LSI Logic Corporation. All rights reserved.
Message
2
6
1
5
2
5
N
Reply
Post
FIFO
1
2
3
Frames
N
8
1
2
N
Reply
Free
FIFO
3-5
Advertisement
Table of Contents
