Articles in this section

Remove and Replace the NVRAM Sled

Kris Weylo
  • Updated
Follow

Remove the NVRAM Sled

Caution

When you remove an NVRAM sled from a fully functional CERES DBox, the NVRAM sled must be replaced within a specific span of time, called the Service Window, after which the consequences of the removal of the NVRAM sled can cause failures in other components of the CERES DBox.

Replacing a failed NVRAM involves removing the NVRAM sled from the CERES DBox, which could cause a data rebuild to occur, resulting in degraded performance.

You can avoid degrading the performance by deactivating the sled. Deactivating copies the data from the defective NVRAMs to other NVRAMs and stops the cluster from using the defective NVRAMs. When you remove a deactivated sled, no data rebuild occurs and there is no impact on the cluster's performance.

Deactivate the carrier before replacing the failed NVRAM via VAST CLI or VAST Web UI.

Deactivation can take uo to 30 minutes approximately, and removes the NVRAM's capacity from the cluster. Start the deactivation approximately 3 hours prior to a scheduled NVRAM sled replacement to be sure the deactivation completes before the replacement.

After you replace the NVRAM sled into the CERES DBox, you must activate the NVRAM sled or the individual NVRAMs to restore their capacity to the cluster.

  1. Connect to the VAST Web UI and do either of the following:

    1. From the menu, select Hardware Layout click (menu_button.png ). Select the necessary sled in the graphical view and and click Deactivate (Deactivate_Icon_VMS.png )in the Sled pane. This deactivates both NVRAMs in the sled.

    2. Deactivate each of the NVRAMs in the sled in Infrastructure > Slots or Infrastructure > NVRAMs by clicking More Actions (3dots_menu.png), then Deactivate (Deactivate_Icon_VMS.png) for the applicable NVRAMs You must deactivate both NVRAMs in the sled before removing the sled.

    VMS_Deactivate_NVRAM_Sled.png

  2. Click Yes to confirm you want to deactivate the sled or NVRAMs. Deactivation commences and the progress is displayed in the Activities page, to which you can navigate from the menu.

    You can alternatively deactivate the individual NVRAMs in the sled from the VAST CLI (see VAST CLI Commands for Deactivating and Activating the NVRAM.)

  3. Remove the Bezel (see Remove and Replace the Bezel).

  4. Remove the Front fan module (see Remove and Replace the Front Fan Module.)

  5. Press down on the tray latch and swing it outwards clockwise.

  6. Pull the sled towards you to pull it from the chassis, as shown in the figure below.

    11.png

  7. Remove the sled.

  8. Replace with a new sled containing 2 NVRAMs immediately after removal.

 

Replace the NVRAM Sled

  1. If fitted, remove the Bezel (see Remove and Replace the Bezel.)

  2. If fitted, remove the Front fan module (see Remove and Replace the Front Fan Module.)

  3. Insert the sled fully into the enclosure, as shown in the figure below.

    11_v2.png

  4. Return the latch to the locked position by turning it counterclockwise.

  5. Replace the Front fan module (see Remove and Replace the Front Fan Module.)

  6. Replace the Bezel (see Remove and Replace the Bezel.)

  7. To activate the applicable NVRAM sled, select Hardware Layout from the menu, select the necessary sled from the graphical view and click the (VMS_Activate_NVRAM_Icon.png) Activate icon. This activates both NVRAMs in the sled.

    You can alternatively activate the individual NVRAMs in the sled from the VAST CLI (see VAST CLI Commands for Deactivating and Activating the NVRAM.)

  8. To activate an NVRAM sled, select Hardware Layout from the menu, select the necessary sled from the graphical view and click the (VMS_Activate_NVRAM_Icon.png) Activate icon. This activates both NVRAMs in the sled.

    You can also activate each of the NVRAMs in the sled in Infrastructure > Slots or Infrastructure > NVRAMs by clicking(3dots_menu.png) More Actions, then Activate VMS_Activate_NVRAM_Icon.png for the applicable NVRAMs. You must activate both NVRAMs in the sled after replacing the sled.

    Activate_NVRAM_after_Replacement.png

  9. Click Yes to confirm you want to activate the NVRAMs.

    Activation commences and the progress is displayed in the Activities page, to which you can navigate from the menu.

 

VAST CLI Commands for Deactivating and Activating the NVRAM

Use the VAST CLI commands given below as an alternative method to deactivate and activate the NVRAM.

  • To list the NVRAMs, run thenvram list command.

    For example:

    vcli: admin> nvram list --dbox-name DBox1

  • To deactivate the NVRAM, run the nvram deactivate command.

    For example:

    vcli: admin> nvram deactivate --id 2

  • To activate the NVRAM, run the nvram activate command.

    For example:

    vcli: admin> nvram activate --id 2
 
 

Related articles

Comments

0 comments

Article is closed for comments.