Adding LUNs to SAN File System

This topic describes how to add LUNs to SAN File System.

Prerequisites

Context

This task describes how to add LUNs without having to stop the cluster, stop and restart each metadata server, and start the cluster.

Steps

  1. Assign the new LUNs to the appropriate zones, according to LUN restrictions and limitations and the considerations for setting up zones.
  2. For Linux™ clients only, you need to perform the following substeps to map the new devices:
    1. On each metadata server, force the QLogic driver to rescan the fabric by entering the following commands at the system prompt:
      echo scsi-qlascan >/proc/scsi/qla2300/2
      echo scsi-qlascan >/proc/scsi/qla2300/3
    2. View the target ID and the LUN for all LUNs that were added by entering the following command at the system prompt:
      more /proc/scsi/qla2300/2
    3. Record the ID LUN combination for any LUN that is not yet registered with the operating system.
    4. For each controller number (2 and 3 are the controller numbers for the QLogic 2342 ports) and ID LUN combination, enter the following command at the system prompt:
      echo "scsi add-single-device controller 0 Id Lun ">/proc/scsi/scsi
      Note: You do not need to map the new devices for Windows® or AIX® clients.
    5. Force the Subsystem Device Driver (SDD), or equivalent driver, to rescan and map the new devices. For SDD, enter the following command at the system prompt:
      /usr/sbin/cfgvpath
      Note: You do not need to map the new devices for Windows or AIX clients.
  3. Ensure that a client is aware of the new LUNs using the rediscoverluns -client command on the administrative CLI.
  4. Verify that a client can access the new LUNs using the reportclient -lun command on the administrative CLI.
  5. For information about making a newly added LUN into a volume, see Adding volumes to a storage pool.

Related concepts
Volumes

Related tasks
Starting a metadata server
Stopping a metadata server

Related reference
How do I set up zones in SAN File System?

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