User Manual

Rev 2.1-1.0.6

Mellanox Technologies

When working without High Availability, you should unmount the SRP partitions that were mounted

prior to shutting down SRP.

2. After Manual Activation of High Availability

If you manually activated SRP High Availability, perform the following steps:

a. Unmount all SRP partitions that were mounted.

b. Stop service srpd (Kill the SRP daemon instances).

c. Make sure there are no multipath instances running. If there are multiple instances, wait for them to end or

kill them.

d. Run: multipath -F

3. After Automatic Activation of High Availability

If SRP High Availability was automatically activated, SRP shutdown must be part of the driver shut-

down ("/etc/init.d/openibd stop") which performs Steps 2-4 of case b above. However, you still have

to unmount all SRP partitions that were mounted before driver shutdown.

4.2 iSCSI Extensions for RDMA (iSER)

4.2.1 Overview

iSCSI Extensions for RDMA (iSER) extends the iSCSI protocol to RDMA. It permits data to be

transferred directly into and out of SCSI buffers without intermediate data copies.

4.2.2 iSER Initiator

The iSER initiator is controlled through the iSCSI interface available from the iscsi-initiator-utils

package.

Make sure iSCSI is enabled and properly configured on your system before proceeding with

iSER.

Targets settings such as

timeouts and retries are set the same as any other iSCSI targets.

Example for discovering and connecting targets over iSER:

iSER also supports RoCE without any additional configuration required. To bond the RoCE

interfaces, set the

fail_over_mac option in the bonding driver.

4.3 IP over InfiniBand

4.3.1 Introduction

The IP over IB (IPoIB) driver is a network interface implementation over InfiniBand. IPoIB

encapsulates IP datagrams over an InfiniBand Connected or Datagram transport service. The

IPoIB driver, ib_ipoib, exploits the following capabilities:

If targets are set to auto connect on boot, and targets are unreachable, it may take a long

time to continue the boot process if timeouts and max retries are set too high.

iscsiadm -m discovery -o new -o old -t st -I iser -p <ip:port> -l