Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

The restrictions described in this section are in addition to the following:

• SRDF/Star restrictions
• Restrictions: SRDF groups and devices for dynamic add operations

The following additional restrictions apply to the SRDF groups and devices in the staging area for dynamic symstar modifycg add operations:

• Staging area cannot be an SRDF/Metro configuration.
• All device pairs must be set in the same mode:
  • Adaptive copy disk
  • Adaptive copy write pending for diskless R21->R2 device pairs
    NOTE:

    Adaptive copy write pending mode is not supported when the R1 side of the SRDF pair is on an array running HYPERMAX OS, and diskless R21 devices are not supported on arrays running HYPERMAX OS.

• Devices in the staging area must be in one of the following SRDF pair states for each SRDF group:
  • Synchronized
  • SyncInProg with no invalid tracks
  • Suspended with no invalid tracks

    If any device is Suspended on any of its SRDF groups, then all devices must be Suspended on all of their SRDF groups.

• All devices to be added in the staging area must be of the same configuration (and over the same arrays) as the SRDF/Star configuration being updated:
  • Concurrent R1 devices
  • Cascaded R1 devices with diskless R21 devices
  • Cascaded R1 devices with non-diskless R21 devices.
• No devices in the staging area can be configured as R22 devices, but they must have an available dynamic mirror position.
• Devices in the staging area cannot be enabled for consistency protection.
• Devices in the staging area cannot be defined with SRDF/Star SDDF sessions.