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Administrator Guide 15

OceanStor 5300 V3, 5500 V3, 5600 V3, 5800 V3, and 6800 V3 Storage System V300R003

Routine maintenance activities are the most common activities for the storage device, including powering on or off the storage device, managing users, modifying basic parameters of the storage device, and managing hardware components. This document applies to the system administrators who are responsible for carrying out routine maintenance activities, monitoring the storage device, and rectifying common device faults.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Reclaiming Space (Windows)

Reclaiming Space (Windows)

This section describes how to reclaim storage space used by a Windows host in full reclamation or partial reclamation mode.

Full Reclamation

  1. Reclaim the World Wide Name (WWN).
    1. Run show mapping_view general to query the ID of a host group in a mapping view to be reclaimed. Specify which mapping view to reclaim using the mapping_view_id parameter.
    2. Obtain the information about hosts and initiators in the to-be-reclaimed host group.

      1. Run show host_group host to show the host that has been added to the to-be-reclaimed host group. Specify the ID of the to-be-reclaimed host group using the mapping_view_id parameter.
      2. Run show initiator to view the WWN about the host HBA that has been added to the to-be-reclaimed host group. Specify the ID of the host in the to-be-reclaimed host group using the host_id parameter.

    3. Run remove host initiator initiator_type=FC to remove the WWN. Specify which WWN to reclaim using the wwn parameter.
    4. Run show initiator isfree=yes initiator_type=FC to check whether the WWN is successfully deleted.

      If the deleted WWN exists in the command output, the deletion is successful.

       admin:/>show
      initiator isfree=yes initiator_type=FC      WWN                 Running
      Status        Free       Alias      Host ID         Multipath Type
           -----------------   -------------------   -----      -------
         ----------      ------------------      100000000000*       Online
                     Yes        --         --              Default

    5. In DeviceManager, view the port information about the host.
  2. Run upadm show path to check the path status of the system. The reclaimed path should not exist in the command output.

    NOTE:
    Wait at least 15 minutes and confirm that no errors exist on disks of other hosts. Then proceed to the next step.

  3. Delete the mapping view.
    1. Run show mapping_view general to query and record the ID of a LUN group and host group in a mapping view to be reclaimed. Specify which mapping view to reclaim using the mapping_view_id parameter.
    2. Run remove mapping_view lun_group to delete the LUN group mapped to the mapping view. Specify which mapping view and LUN group to reclaim using the mapping_view_id and lun_group_id parameters.
    3. Run remove mapping_view port_group to delete the port group in the mapping view. Specify which mapping view and port group to reclaim using the mapping_view_id and port_group_id parameters.
    4. Run remove mapping_view host_group to delete the host group in the mapping view. Specify which mapping view and host group to reclaim using the mapping_view_id and host_group_id parameters.
    5. Run delete mapping_view to delete a mapping view. Specify which mapping view to reclaim using the mapping_view_id parameter.
    6. Run show mapping_view general to check whether that mapping view has been deleted.
      The deleted mapping view should not exist in the command output.
    7. In DeviceManager, view all mapping views. The deleted mapping view should not exist.
  4. Delete a LUN group.
    1. Run remove lun_group lun to remove all LUNs in the LUN group. Specify which LUN group and LUNs to reclaim using the lun_group_id and lun_id_list parameters.
    2. Run delete lun_group to delete a LUN group. Specify which LUN group to reclaim using the lun_group_id parameter.
  5. Delete a port group
    1. Run remove port_group port to remove all ports in the port group. Specify which port group and ports to reclaim using the port_group_id and port_id_list parameters.
    2. Run delete port_group to delete a port group. Specify which port group to reclaim using the port_group_id parameter.
  6. Delete a host group.
    1. Run remove host_group host to remove all hosts in the host group. Specify which host group and hosts to reclaim using the host_group_id and host_id_list parameters.
    2. Run delete host_group to delete a host group. Specify which host group to reclaim using the host_group_id parameter.
    3. Run remove host initiator initiator_type=FC to remove all initiators of the to-be-reclaimed host. Specify which initiators to reclaim using the wwn parameter.
    4. Run delete host to delete a to-be-reclaimed host. Specify which host to reclaim using the host_id parameter.
  7. Scan for disks on the host.
    1. Press Windows+R (if the operation is performed remotely, perform it in full screen mode) to open the Run dialog box.
    2. Type devmgmt.msc and press Enter.
    3. In the Device Manager window that is displayed, click View and select Show hidden devices.
    4. Right-click Disk Drives and choose Scan for hardware changes to start scanning.
    5. Check whether the number of newly generated UltraPath_Disks is the same as that of mapped LUNs. If they are different, check the LUN mapping and path connection status on the storage device.
    6. Check whether the number of newly generated SCSI disks (SCSI Disk Devices on the Huawei storage device) doubles or quadruples that of UltraPath_Disks in 7.e. If not, check the LUN mapping and path connection status on the storage device.
  8. Uninstall UltraPath.
    1. Press Windows+R (if the operation is performed remotely, perform it in full screen mode) to open the Run dialog box.
    2. Type appwiz.cpl and press Enter.
      The Programs and Features page is displayed.
    3. Right-click UltraPath and choose Uninstall from the shortcut menu.
    4. Follow the wizard until UltraPath is uninstalled.
  9. Run shutdown -r -t 0 to restart the host.
  10. On the switch, delete zone or VLAN configurations.

Partial Reclamation

  1. Remove the to-be-reclaimed LUN from the owning LUN group.
    1. Run show mapping_view general to obtain the details about the to-be-reclaimed mapping view. Specify the mapping view using the mapping_view_id parameter.
    2. Run remove lun_group lun to remove the to-be-reclaimed LUN from the LUN group. Specify the LUN group and to-be-reclaimed LUN using the lun_group_id and lun_id_list parameters.
    3. Run show lun_group lun to check whether the to-be-reclaimed LUN has been deleted from the LUN group successfully. Specify the LUN group using the lun_group_id parameter.

      The deleted LUN should not exist in the command output.

      admin:/>show lun_group lun lun_group_id=LGID      
      ID     Name       Pool ID    Capacity      Helth Status      Running Status      Type      WWN     
      ----   ---------  ---------- ------------- ---------------   ------------------- -------   ---------------------------------
      1      LUN1       0          1.000TB       Normal            Online              Thick     60022a11000******************

  2. Scan for disks on the host.
    1. Press Windows+R (if the operation is performed remotely, perform it in full screen mode) to open the Run dialog box.
    2. Type devmgmt.msc and press Enter.
    3. In the Device Manager window that is displayed, click View and select Show hidden devices.
    4. Right-click Disk Drives and choose Scan for hardware changes to start scanning.
    5. Check whether the number of newly generated UltraPath_Disks is the same as that of mapped LUNs. If they are different, check the LUN mapping and path connection status on the storage device.
    6. Check whether the number of newly generated SCSI disks (SCSI Disk Devices on the Huawei storage device) doubles or quadruples that of UltraPath_Disks in 2.e. If no, check the LUN mapping and path connection status on the storage device.
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Updated: 2019-04-17

Document ID: EDOC1000084191

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