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Install and maintain

Replace a drive drawer in a DS460C disk shelf - shelves with IOM12/IOM12B modules

Contributors netapp-martyh netapp-lisa
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Replacing a drive drawer in a shelf requires you to either halt the entire storage system (HA pair), which allows you to keep data aggregates on the shelf, or you have the option to keep the HA pair up and running, which requires you to move all of the data from the data aggregates residing on the disk drives, and offline and delete the data aggregates. However, if the shelf contains a root aggregate, you must halt the HA pair.

Before you begin

You need these items for this procedure:

  • Antistatic protection

    Note Possible hardware damage: To prevent electrostatic discharge damage to the drive shelf, use proper antistatic protection when handling drive shelf components.

  • Replacement drive drawer

  • Replacement left and right cable chains

  • Flashlight

About this task

  • This procedure applies to shelves having DCM drive drawers and/or DCM2 drive drawers. (Shelves will also have two IOM12 modules or two IOM12B modules.)

    When a DCM or DCM2 drive drawer fails, you receive a DCM or DCM2 drive drawer to replace it.

Note

If when you replace a failed drive drawer, it results in the shelf having a combination of IOM12 modules and any number of DCM2 drive drawers, you must upgrade the IOM12 FW to version 0300 or later because the IOM12 modules require a version of FW that supports DCM2 drive drawers.

The IOM12 FW upgrade can be done before or after replacing a drive drawer. This procedure has you upgrade the FW as part of the preparation for the drawer replacement procedure.

  • The DCM drive drawers and the DCM2 drive drawers can be distinguished by their appearance:

    The DCM drive drawers look like the following:

    Front view of a DCM drive shelf

    The DCM2 drive drawers are distinguished by a blue stripe and "DCM2" label:

    Front view of a DCM2 drive shelf

Prepare to replace a drive drawer

Before you replace a drive drawer, you must make sure to update IOM12 FW if needed, and either halt the HA pair, which allows you to keep data aggregates on the shelf, or you have the option to keep the HA pair up and running, which requires you to move all of the data from the data aggregates residing on the disk drives, and offline and delete the data aggregates. However, if the shelf contains a root aggregate, you must halt the HA pair. Lastly, you must power off the shelf.

steps

  1. Determine if when you replace the failed drive drawer, it results in the shelf having a combination of IOM12 modules and any number of DCM2 drive drawers.

  2. If the shelf will have a combination of IOM12 modules and any number of DCM2 drive drawers, you must upgrade the IOM12 FW to version 0300 or later; otherwise, go to the next step.

    Current versions of firmware can be found on the NetApp Support Site.

    NetApp Downloads: Disk Shelf Firmware

  3. If the shelf contains the root aggregate from either controller in the HA pair, or if you chose to halt the HA pair (instead of keeping the HA pair up and running), complete the following substeps; otherwise, go to the next step.

    Note Data aggregates can remain on the shelf when halting the HA pair.

    1. Halt both controllers in the HA pair.

    2. Verify that your HA pair halted by checking the storage system console.

    3. Power off the shelf.

    4. Go to the section, Remove the cable chains.

  4. If you chose to keep the HA pair up and running, complete the following substeps:

    Note If you attempt to replace a drawer with aggregates on the disk shelf, you could cause a system disruption with a multidisk panic.

    1. Move all of the data from the data aggregates residing on the disk drives.

      Data includes, but is not limited to, volumes and LUNs.

    2. Offine and delete the aggregates to allow the disk drives to become spares:

      Commands can be entered from the clustershell of either controller.

      storage aggregate offline -aggregate aggregate_name

      storage aggregate delete -aggregate aggregate_name

    3. Verify that the disk drives have no aggregates (are spares):

      1. Enter the following command from the clustershell of either controller: storage disk show -shelf shelf_number

      2. Check the output to verify that the drisk drives are spares.

        Disk drives that are spares show spare in the Container Type column.

        Note If you have failed disk drives in the shelf, broken appears in the Container Type column.

    4. Power off the shelf.

Remove the cable chains

Left and right cable chains for each drive drawer in the DS460C drive shelf allow the drawers to slide in and out. Before you can remove a drive drawer, you must remove both cable chains.

Before you begin

  • You have completed the Prepare to replace a drive drawer steps so that your HA pair is halted or you have moved all of the data from the data aggregates residing on the disk drives, and offlined and deleted the data aggregates to allow the disk drives to become spares.

  • You have powered off the shelf.

  • You have obtained the following items:

    • Antistatic protection

      Note Possible hardware damage: To prevent electrostatic discharge damage to the shelf, use proper antistatic protection when handling shelf components.

    • Flashlight

About this task

Each drive drawer has left and right cable chains. The metal ends on the cable chains slide into corresponding vertical and horizontal brackets inside the enclosure, as follows:

  • The left and right vertical brackets connect the cable chain to the enclosure's midplane.

  • The left and right horizontal brackets connect the cable chain to the individual drawer.

Steps

  1. Put on antistatic protection.

  2. From the rear of the drive shelf, remove the right fan module, as follows:

    1. Press the orange tab to release the fan module handle.

      The figure shows the handle for the fan module extended and released from the orange tab on the left.

      Extended fan module handle

      Callout number 1

      Fan module handle

    2. Using the handle, pull the fan module out of the drive shelf, and set it aside.

  3. Manually determine which of the five cable chains to disconnect.

    The figure shows the right side of the drive shelf with the fan module removed. With the fan module removed, you can see the five cable chains and the vertical and horizontal connectors for each drawer. The callouts for drive drawer 1 are provided.

    View of the five cable chains and the vertical and horizontal connectors for each drawer

    Callout number 1

    Cable chain

    Callout number 2

    Vertical connector (connected to the midplane)

    Callout number 3

    Horizontal connector (connected to the drive drawer)

    The top cable chain is attached to drive drawer 1. The bottom cable chain is attached to drive drawer 5.

  4. Use your finger to move the cable chain on the right side to the left.

  5. Follow these steps to disconnect any of the right cable chains from its corresponding vertical bracket.

    1. Using a flashlight, locate the orange ring on the end of the cable chain that is connected to the vertical bracket in the enclosure.

      Orange ring on the end of the cable chain

      Callout number 1

      Orange ring on the vertical bracket

    2. Disconnect the vertical connector (connected to the midplane) by gently pressing on the center of the orange ring and pulling the left side of the cable out of the enclosure.

    3. To unplug the cable chain, carefully pull your finger toward you approximately 1 inch (2.5 cm), but leave the cable chain connector within the vertical bracket.

  6. Follow these steps to disconnect the other end of the cable chain:

    1. Using a flashlight, locate the orange ring on the end of the cable chain that is attached to the horizontal bracket in the enclosure.

      The figure shows the horizontal connector on the right and the cable chain disconnected and partially pulled out on the left side.

      Cable chain and orange ring

      Callout number 1

      Orange ring on horizontal bracket

      Callout number 2

      Cable chain

    2. Gently insert your finger into the orange ring.

      The figure shows the orange ring on the horizontal bracket being pushed down so that the rest of the cable chain can be pulled out of the enclosure.

    3. Pull your finger toward you to unplug the cable chain.

  7. Carefully pull the entire cable chain out of the drive shelf.

  8. From the back of the drive shelf, remove the left fan module.

  9. Follow these steps to disconnect the left cable chain from its vertical bracket:

    1. Using a flashlight, locate the orange ring on the end of the cable chain attached to the vertical bracket.

    2. Insert your finger into the orange ring.

    3. To unplug the cable chain, pull your finger toward you approximately 1 inch (2.5 cm), but leave the cable chain connector within the vertical bracket.

  10. Disconnect the left cable chain from the horizontal bracket, and pull the entire cable chain out of the drive shelf.

Remove a drive drawer

After removing the right and left cable chains, you can remove the drive drawer from the drive shelf. Removing a drive drawer entails sliding the drawer part of the way out, removing the drives, and removing the drive drawer.

Before you begin

  • You have removed the right and left cable chains for the drive drawer.

  • You have replaced the right and left fan modules.

Steps

  1. Remove the bezel from the front of the drive shelf.

  2. Unlatch the drive drawer by pulling out on both levers.

  3. Using the extended levers, carefully pull the drive drawer out until it stops. Do not completely remove the drive drawer from the drive shelf.

  4. Remove the drives from the drive drawer:

    1. Gently pull back the orange release latch that is visible on the center front of each drive. The following image shows the orange release latch for each of the drives.

      Drive release latches

    2. Raise the drive handle to vertical.

    3. Use the handle to lift the drive from the drive drawer.

      Installing or removing a drive

    4. Place the drive on a flat, static-free surface and away from magnetic devices.

      Note Possible loss of data access: Magnetic fields can destroy all data on the drive and cause irreparable damage to the drive circuitry. To avoid loss of data access and damage to the drives, always keep drives away from magnetic devices.

  5. Follow these steps to remove the drive drawer:

    1. Locate the plastic release lever on each side of the drive drawer.

      Drawer release lever

      Callout number 1

      Drive drawer release lever

    2. Open both release levers by pulling the latches toward you.

    3. While holding both release levers, pull the drive drawer toward you.

    4. Remove the drive drawer from the drive shelf.

Install a drive drawer

Installing a drive drawer into a drive shelf entails sliding the drawer into the empty slot, installing the drives, and replacing the front bezel.

Before you begin

  • You have obtained the following items:

    • Replacement drive drawer

    • Flashlight

Steps

  1. From the front of the drive shelf, shine a flashlight into the empty drawer slot, and locate the lock-out tumbler for that slot.

    The lock-out tumbler assembly is a safety feature that prevents you from being able to open more than one drive drawer at one time.

    Location of the lock-out tumbler and drawer guide

    Callout number 1

    Lock-out tumbler

    Callout number 2

    Drawer guide

  2. Position the replacement drive drawer in front of the empty slot and slightly to the right of center.

    Positioning the drawer slightly to the right of center helps to ensure that the lock-out tumbler and the drawer guide are correctly engaged.

  3. Slide the drive drawer into the slot, and ensure that the drawer guide slides under the lock-out tumbler.

    Note Risk of equipment damage: Damage occurs if the drawer guide does not slide under the lock-out tumbler.

  4. Carefully push the drive drawer all the way in until the latch fully engages.

    Note Risk of equipment damage: Stop pushing the drive drawer if you feel excessive resistance or binding. Use the release levers at the front of the drawer to slide the drawer back out. Then, reinsert the drawer into the slot, and ensure that it slides in and out freely.

  5. Follow these steps to reinstall the drives in the drive drawer:

    1. Unlatch the drive drawer by pulling out on both levers at the front of the drawer.

    2. Using the extended levers, carefully pull the drive drawer out until it stops. Do not completely remove the drive drawer from the drive shelf.

    3. On the drive you are installing, raise the handle to vertical.

    4. Align the two raised buttons on each side of the drive with the notches on the drawer.

      The figure shows the right side view of a drive, showing the location of the raised buttons.

      Location of raised buttons on drive

      Callout number 1

      Raised button on the right side of the drive.

    5. Lower the drive straight down, and then rotate the drive handle down until the drive snaps into place.

      If you have a partially populated shelf, meaning that the drawer in which you are reinstalling drives has less than the 12 drives it supports, install the first four drives into the front slots (0, 3, 6, and 9).

      Note Risk of equipment malfunction: To allow for proper air flow and prevent overheating, always install the first four drives into the front slots (0, 3, 6, and 9).
      Installing or removing a drive

    6. Repeat these substeps to reinstall all of the drives.

  6. Slide the drawer back into the drive shelf by pushing it from the center and closing both levers.

    Note Risk of equipment malfunction: Make sure to completely close the drive drawer by pushing both levers. You must completely close the drive drawer to allow proper airflow and prevent overheating.

  7. Attach the bezel to the front of the drive shelf.

Attach the cable chains

The final step in installing a drive drawer is attaching the replacement left and right cable chains to the drive shelf. When attaching a cable chain, reverse the order you used when disconnecting the cable chain. You must insert the chain's horizontal connector into the horizontal bracket in the enclosure before inserting the chain's vertical connector into the vertical bracket in the enclosure.

Before you begin

  • You have replaced the drive drawer and all of the drives.

  • You have two replacement cable chains, marked as LEFT and RIGHT (on the horizontal connector next to the drive drawer).

Left hand replacement cable chain
Callout Cable chain Connector Connects to

Callout number 1

Left

Vertical

Midplane

Callout number 2

Left

Horizontal

Drive drawer

Right hand replacement cable chain

Callout Cable chain Connector Connects to

Callout number 1

Right

Horizontal

Drive drawer

Callout number 2

Right

Vertical

Midplane
Steps

  1. Follow these steps to attach the left cable chain:

    1. Locate the horizontal and vertical connectors on the left cable chain and the corresponding horizontal and vertical brackets inside the enclosure.

    2. Align both cable chain connectors with their corresponding brackets.

    3. Slide the cable chain's horizontal connector under the guide rail on the horizontal bracket, and push it in as far as it can go.

      The figure shows the guide rail on the left side for the second drive drawer in the enclosure.

      Guide rail

      Callout number 1

      Guide rail
      Note

      Risk of equipment malfunction: Make sure to slide the connector underneath the guide rail on the bracket. If the connector rests on the top of the guide rail, problems might occur when the system runs.

    4. Slide the vertical connector on the left cable chain into the vertical bracket.

    5. After you have reconnected both ends of the cable chain, carefully pull on the cable chain to verify that both connectors are latched.

      Note

      Risk of equipment malfunction: If the connectors are not latched, the cable chain might come loose during drawer operation.

  2. Reinstall the left fan module.

  3. Follow these steps to reattach the right cable chain:

    1. Locate the horizontal and vertical connectors on the cable chain and their corresponding horizontal and vertical brackets inside the enclosure.

    2. Align both cable chain connectors with their corresponding brackets.

    3. Slide the cable chain's horizontal connector under the guide rail on the horizontal bracket and push it in as far as it will go.

      Note

      Risk of equipment malfunction: Make sure to slide the connector underneath the guide rail on the bracket. If the connector rests on the top of the guide rail, problems might occur when the system runs.

    4. Slide the vertical connector on the right cable chain into the vertical bracket.

    5. After you reconnect both ends of the cable chain, carefully pull on the cable chain to verify that both connectors are latched.

      Note

      Risk of equipment malfunction: If the connectors are not latched, the cable chain might come loose during drawer operation.

  4. Reinstall the right fan module.

  5. Reapply power:

    1. Turn on both power switches on the drive shelf.

    2. Confirm that both fans come on and that the amber LED on the back of the fans is off.

  6. If you had halted the HA pair, boot ONTAP on both controllers; otherwise go to the next step.

  7. If you had moved data off the shelf and deleted the data aggregates, you can now use the spare disks in the shelf for aggregate creation or expansion.

    Aggregate creation workflow

    Aggregate expansion workflow