User Manual

Rev 1.4.1-
Mellanox Techologies
17
3 Driver Features
3.1 SCSI RDMA Protocol
3.1.1 SRP Overview
The InfiniBand package includes a storage module called SRP, which causes each InfiniBand port
on the VMware ESX Server machine to be exposed as one or more physical storage adapters, also
referred to as vmhbas. To verify that all supported InfiniBand ports on the host are recognized and
up, perform the following steps:
1. Connect to the VMware ESX Server machine us
ing the interface of VMware VI Client.
2. Select the "Configuration" tab.
3. Click the "Storage Adapters" entry which appears in the
"Hardware" list. A "Storage Adapt-
ers" list is displayed, describing per device the "Device" it resides
on and its type. InfiniBand
storage adapters will appear as SCSI adapters.
InfiniBand storage adapters are listed
under HCA name as follow:
 MT25418[ConnectX VPI - 10GigE/IB DDR, PCIe 2.0 2.5GT/s]
 vmhba_mlx4_0.1.1 SCSI
 vmhba_mlx4_0.2.1 SCSI
To make sure what storage adapters (vmhbas) are associated with your InfiniBand device, log into
the service console and run:
cos# ibstat -vmhba
4. Click on the storage device to display a window with additional details (e.g. Model, number
of targets, Logical Units Numbers and their details).
3.1.1.1 Module Configuration
The SRP module is configured upon installation
to default values. You can use the esxcfg-module
utility (available in the service console) to manually configure SRP.
1. To disable the SRP module run:
cos# esxcfg-module ib_srp -d
2. Additionally, you can modify the default parameters of the SRP module, such as the maxi-
mum number of targets per SCSI host. To retrieve the list and descript
ion of the parameters
supported by the SRP module, run:
cos# vmkload_mod ib_srp -s
3. To check which parameters are currently used by SRP module, run:
cos# esxcfg-module ib_srp -g
4. To set a new parameter, run:
All the features supported by a storage adapter are also supported by an InfiniBand
SCSI storage adapter. Setting the features is performed transparently.
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