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OceanStor 9000 V5 7.0 Parts Replacement 05

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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).
Replacing a System Disk Module

Replacing a System Disk Module

System disk modules are used to boot operating systems.

Impact on the System

If the two system disk modules form a RAID 1, the system will not be affected. Otherwise, the system will break down.

Prerequisites

  • The replacement system disk module is ready.
  • The faulty system disk modules have been located.
    Figure 3-5 shows the system disk module slots.of a P12X or P25X.
    Figure 3-5  System disk slots on the rear panel of P12X or P25X

Precaution

  • Do not remove the two system disk modules at the same time. Otherwise, the device cannot work.
  • After a system disk module is replaced, data will be reconstructed on the new system disk. Do not remove and insert the other system disk module within 4 hours. Otherwise, the device cannot work.
  • To prevent damaging the system disk module or connectors, remove or install the system disk module with even force.
  • When you remove a system disk module, first remove it from the connector. Wait at least 30 seconds and remove the system disk module completely from the chassis.
  • To prevent a system disk module from damage, wait at least 1 minute after removal and before inserting a system disk module, or after insertion and before removing a system disk module.
  • To avoid data loss, you only need to replace the system disk module whose Fault indicator is yellow on.
  • To avoid system failures, do not reuse disks.

Tools and Materials

  • Electrostatic discharge (ESD) gloves
  • ESD wrist straps
  • ESD bags
  • Labels

Procedure

  1. Wear an ESD wrist strap or ESD gloves.
  2. Remove the disk module.
    1. Press the ejector release button on the drive, as shown in step 1 in Figure 3-6.

      The ejector lever automatically ejects.

      Figure 3-6  Removing a disk module

    2. Hold the ejector lever, and pull the disk module out by approximately 3 cm, as shown in step 2 in Figure 3-6.
    3. Wait at least 30 seconds until the disk module stops and then slowly pull it out, as shown in step 3 in Figure 3-6.
  3. Put the removed disk module in an ESD bag.
  4. Enable PHY of the slot where the faulty disk sits.
    1. Use the KVM to log in to the storage node as user root.
    2. On the CLI of the operating system, input smp_phy_control --phy=slotid --op=lr /dev/bsg/expander. Then, press Tab, and press Enter, enable PHY of the slot where the faulty disk sits.

      slotid in the command is the internal slot ID of the system disk. To obtain slotid, log in to DeviceManager, view the slot information in the System Disk Is Faulty Or Removed alarm, and confirm the slot ID according to the following table:

      Table 3-1  Relationship between the P12X Alarm Slots and the Values of slotid

      Alarm Slot

      Value of slotid

      SLOT04

      14

      SLOT05

      15

      Table 3-2  Relationship between the P25X Alarm Slots and the Values of slotid

      Alarm Slot

      Value of slotid

      SLOT04

      25

      SLOT05

      26

    3. On the CLI of the operating system, input smp_discover --phy=slotid /dev/bsg/expander. Then, press Tab, and press Enter, check if the value of negotiated logical link rate is phy enabled. If no, contact Huawei technical support.
  5. Take the replacement disk module out of its ESD bag.
  6. Install the disk module.
    1. Raise the ejector lever and push the disk module in along the guide rails until it does not move, as shown in step 1 in Figure 3-7.

      Figure 3-7  Installing a disk module

    2. Ensure that the ejector lever is fastened to the beam, and lower the ejector lever to completely insert the disk module into the slot, as shown in step 2 in Figure 3-7.
  7. Wait 3 minutes and then check the Fault and Active indicators on the disk module to determine whether the disk module is successfully installed.

    • If the Active indicator is steady on or blinking green, and the disk module Fault indicator is off, the installation is successful.
    • Possible causes as to why the disk module Fault indicator is steady yellow are:
      • The disk module has not been firmly inserted. Wait 1 minute and then reinsert it.
      • If the disk module Fault indicator is still steady yellow after you have reinserted the disk module, the replacement disk module may be faulty. Replace it with another one.
      • If the Fault indicator is still steady yellow after the replacement, the link of the disk slot may be broken. In this case, contact technical support.

  8. Check the RAID status.
    1. Use the KVM to log in to the operating system of the storage node as user root.
    2. On the CLI of the operating system, input cat /sys/block/sda/device/raid_devices/. Then, press Tab, input state, and press Enter, check the RAID status of the system disk.

      • If the status is resyncing, the RAID of the system disk is being reconstructed.

      • After a period of time, when the status changes to active, the RAID reconstruction of the system disk is complete. The RAID reconstruction of the system disk takes about four hours.

  9. Inspect the system using SmartKit. Choose Home > Storage > Routine Maintenance > More > Inspection to check the system status. For details, see the OceanStor 9000 V5 Routine Maintenance.

    • If all inspection items are successful: The inspection is successful.
    • If some inspection items fail the inspection: The inspection is failed. Rectify the faults by taking recommended actions in the inspection reports. You need to reperform inspection after rectifying. If the inspection is still failed, contact Huawei technical support.

Follow-up Procedure

After replacing the disk module, label the replaced disk module to facilitate subsequent operations.

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Updated: 2019-07-25

Document ID: EDOC1100067965

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