Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

Use the symrecover command to launch and optimize SRDF Automated Recovery. The symrecover command can be run from either the R1 or the R2 side as long as all the SRDF standard devices in the device group or the composite group are local to the host. When devices in groups are not local to a host, they are marked as invalid to stop all control operations from being performed against them.

If an SRDF/A group becomes synchronous (SRDF/S), symrecover attempts to reset the SRDF link to SRDF/A mode.

The symrecover command can be invoked manually from the command line, is typically configured to run continuously in the background using one of the following:

• Windows Scheduled Tasks
• UNIX CRON/scheduled task
• UNIX (RC.2) file

Syntax

Use the following syntax to launch SRDF Automated Recovery operations:

symrecover [-h]
symrecover [-env | -version]

symrecover start {-g DgName | -cg CgName}
[-mode {SYNC | ASYNC}] [-out LogPath]
[-options FileName]

Options

-g DgName

Specifies a device group.

-cg CgName

Specifies a composite group.

-mode {SYNC | ASYNC}

Specifies the SRDF session type, either synchronous or asynchronous. There is no default; this option must be specified.

-out LogPath

Specifies an alternate fully-qualified directory location for the log file.

-options FileName

Specifies the fully-qualified name of the file that contains program options. See symrecover options file parametersfor a list of possible settings.

Restrictions

• You can define devices in groups on the R2 side with a corresponding partner but symrecover cannot start in this environment. You cannot monitor groups on the R2 side when the remote partner is concurrent. You must monitor these groups from the host.
• The symrecover command does not support the monitoring or recovery of a device group or composite group that is set with an ANY group type.
• Any options specified on the command line take precedence over the options specified by -options FileName.
• In a cascaded SRDF environment:
  • Specify the target composite group.
  • Do not use the -mode option.

Examples

To start a recovery in a basic SRDF/S environment:

symrecover start -g DgName -mode sync -options OptnFile

To start a recovery in a cascaded SRDF environment:

symrecover start -cg CgName -cascaded_monitor_both_hops -options OptnFile