User Manual

Driver FeaturesRev 2.0-3.0.0

Mellanox Technologies

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. 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.

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.

iSCSI Extensions for RDMA (iSER) is currently at beta level.

Please be aware that the content below is subject to change.

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