QLogic OFED+ Host Software User Guide, Rev. B

D
SRP Configuration
SRP Configuration Overview
SRP stands for SCSI RDMA Protocol. It allows the SCSI protocol to run over
InfiniBand for Storage Area Network (SAN) usage. SRP interfaces directly to the
Linux file system through the SRP Upper Layer Protocol (ULP). SRP storage can
be treated as another device.
In this release, two versions of SRP are available: QLogic SRP and OFED SRP.
QLogic SRP is available as part of the QLogic OFED Host Software, QLogic
InfiniBand Fabric Suite, Rocks Roll, and Platform PCM downloads.
SRP has been tested on targets from DataDirect Networks and Engenio (now
LSI Logic ® ).
NOTE:
Before using SRP, the SRP targets must already be set up by your system
administrator.
Important Concepts
• A SRP Initiator Port is a adapter port through which the host communicates
with a SRP target device (e.g., a Fibre Channel disk array) via a SRP target
port.
• A SRP Target Port is an IOC of the VIO hardware. In the context of VIO
hardware, an IOC can be thought of as a SRP target. An FVIC contains 2
IOCs. IOC1 maps to the first adapter on the FVIC, and IOC2 maps to the
2nd adapter on the FVIC. On an FCBM, there are also 2 IOCs, and IOC1
maps to port 1 of the adapter of the FC BM and IOC2 maps to port 2 of the
adapter of the FC BM.
• A Fibre Channel Target Device is a device containing storage resources that
is located remotely from a Fibre Channel host. In the context of SRP/VIO
hardware, this is typically an array of disks connected via Fibre Channel to
the VIO hardware.
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