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Installation Guide

OceanStor 5000, 5000F, 6000, and 6000F V5 Series V500R007

This document is applicable to OceanStor 5110 V5, 5110F V5, 5300 V5, 5300F V5, 5500 V5, 5500F V5, 5600 V5, 5600F V5, 5800 V5, 5800F V5, 6800 V5, and 6800F V5 storage systems. It describes hardware installation of those storage systems for helping you easily and quickly finish the installation.
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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).
Connecting Disk Enclosures (Applicable to 5000 and 6000 Series)

Connecting Disk Enclosures (Applicable to 5000 and 6000 Series)

You can connect additional disk enclosures to a controller enclosure to expand storage space.

Prerequisites

The required installation tools and materials include:

  • Mini SAS HD electrical/optical cables
  • Diagonal pliers
  • Cable ties

Context

  • Before cascading disk enclosures, read the following to understand the distribution of interface modules or expansion modules:
    • In the rear view of a controller enclosure, ports on interface modules are identified with a number starting from 0 from the top down and have corresponding identifiers on the port modules.
    • In the rear view of a disk enclosure, expansion module A is in the upper part, and expansion module B is in the lower part. They have corresponding identifiers on the rear of the disk enclosure.
    • In the rear view of a high-density disk enclosure, expansion module A is on the right, and expansion module B is on the left. They have corresponding identifiers on the rear of the disk enclosure.
  • Before connecting disk enclosures to a controller enclosure, carefully read the following rules:
    • SAS expansion cables must be naturally bent, and a minimum of 97 mm clearance must be reserved in front of each enclosure for winding cables.
    • Connect a controller enclosure to a high-density disk enclosure using mini SAS HD electrical cables. The cables must be naturally bent, and a minimum of 97 mm clearance must be reserved in front of each enclosure for winding cables.
    • Common and high-density disk enclosures cannot be connected to one expansion loop.
    • If a storage system is configured with two or more disk enclosures, you are advised to form multiple expansion loops based on the number of expansion ports on the controller enclosure, and ensure that the disk enclosures are evenly distributed to each loop.
    • (Applicable to 5110 V5, 5300 V5, 5500 V5, 5600 V5, and 5800 V5) Every pair of SAS ports can be connected to a maximum of eight SAS disk enclosures. The recommended number of the connected SAS disk enclosures should not exceed two.
    • (Applicable to 6800 V5) Every pair of SAS ports can be connected to a maximum of four standard SAS disk enclosures.
    • (Applicable to 5300 V5) Every two pairs of SAS ports (a pair consists of two adjacent ports on the same interface module) can be connected to a maximum of seven high-density disk enclosures. It is recommended that the number of high-density disk enclosures connected to two pairs of SAS ports should not exceed two.
    • (Applicable to 5500 V5, 5600 V5, and 5800 V5) Every two pairs of SAS ports (a pair consists of two adjacent ports on the same interface module) can be connected to a maximum of eight high-density disk enclosures. It is recommended that the number of high-density disk enclosures connected to two pairs of SAS ports should not exceed two.
    • (Applicable to 6800 V5) Every pair of SAS ports can be connected to a maximum of four high-density disk enclosures (in single-uplink networking only). The recommended number of the connected high-density disk enclosures should not exceed two.
    • 5110 V5 does not support the high-density disk enclosures.
  • Except for the configuration disk enclosure that is directly connected to controller A and controller B, all other disk enclosures in the same loop are connected by two independent links. To be more specific, the forward and backward connection mode is used for optimal network reliability.
NOTE:

For the loops shown in Figure 6-5, Figure 6-6, Figure 6-7, and Figure 6-8, the red and green cables represent two independent links that are redundant for each other. The way to set up a loop where the configuration disk enclosure resides is different from the way to set up other types of loops. The black cables in Figure 6-6, Figure 6-7, and Figure 6-8 represent the difference.

The following figures provide cable connection guidance for cascading disk enclosures:
  • Common disk enclosures
    • 2 U controller enclosure

    Figure 6-5 shows an example of how a 2 U controller enclosure with mini SAS HD ports is connected to two disk enclosures using mini SAS HD electrical/optical cables. You can obtain more network diagrams from Huawei Storage Product Networking Assistant (https://support.huawei.com/onlinetoolsweb/sna/#/home).

    Figure 6-5 2 U controller enclosure connected to two disk enclosures
    • 3 U controller enclosure

    Figure 6-6 shows an example of how a 3 U controller enclosure with mini SAS HD ports is connected to four disk enclosures using mini SAS HD electrical/optical cables. You can obtain more network diagrams from Huawei Storage Product Networking Assistant (https://support.huawei.com/onlinetoolsweb/sna/#/home).

    Figure 6-6 3 U controller enclosure connected to four disk enclosures
    NOTE:

    The first disk enclosure that is connected to port P0 of slots A0 and B0 on a 3 U controller enclosure must be a disk enclosure with coffer disks.

    • 6 U controller enclosure

    Figure 6-7 and Figure 6-8 show an example of how a 6 U controller enclosure with two controllers is cascaded with four disk enclosures and a 6 U controller enclosure with four controllers is cascaded with eight disk enclosures using mini SAS HD electrical/optical cables through mini SAS HD ports. You can obtain more network diagrams from Huawei Storage Product Networking Assistant (https://support.huawei.com/onlinetoolsweb/sna/#/home).

    Figure 6-7 6 U controller enclosure with two controllers and cascaded with four disk enclosures
    Figure 6-8 6 U controller enclosure with four controllers and cascaded with eight disk enclosures
    NOTE:

    To ensure proper system running when a 6 U controller enclosure has four controllers configured, comply with the following rule when completing the connections: The first SAS port of the 12 Gbit/s SAS interface modules inserted in slots L5 and R5 of a 6 U controller enclosure must be connected to a disk enclosure with coffer disks.

  • Common disk enclosures and high-density disk enclosures

    Figure 6-9 shows how to connect a 3 U controller enclosure with mini SAS HD ports to two common disk enclosures and two high-density disk enclosures using mini SAS HD electrical/optical cables.

    Figure 6-9 3 U controller enclosure connected to two common disk enclosures and two high-density disk enclosures
    NOTE:

    The first disk enclosure that is connected to port P0 of slots A0 and B0 on a 3 U controller enclosure must be a disk enclosure with coffer disks.

  • High-density disk enclosures
    • 2 U controller enclosure

    Figure 6-10 shows an example of how a controller enclosure with mini SAS HD ports is connected to three high-density disk enclosures using mini SAS HD electrical cables. You can obtain more network diagrams from Huawei Storage Product Networking Assistant (https://support.huawei.com/onlinetoolsweb/sna/#/home).

    Figure 6-10 2 U controller enclosure connected to three high-density disk enclosures

    • 3 U controller enclosure

    Figure 6-11 shows an example of how a controller enclosure with mini SAS HD ports is connected to three high-density disk enclosures using mini SAS HD electrical cables. You can obtain more network diagrams from Huawei Storage Product Networking Assistant (https://support.huawei.com/onlinetoolsweb/sna/#/home).

    Figure 6-11 3 U controller enclosure connected to three high-density disk enclosures
    NOTE:

    The first disk enclosure that is connected to port P0 of slots A0 and B0 on a 3 U controller enclosure must be a disk enclosure with coffer disks.

    • 6 U controller enclosure

    Figure 6-12 shows an example of how a controller enclosure with mini SAS HD ports is connected to three high-density disk enclosures using mini SAS HD electrical cables. You can obtain more network diagrams from Huawei Storage Product Networking Assistant (https://support.huawei.com/onlinetoolsweb/sna/#/home).

    Figure 6-12 6 U controller enclosure (two controllers configured) connected to three high-density disk enclosures
    NOTE:

    To ensure proper system running when a 6 U controller enclosure has four controllers configured, comply with the following rule when completing the connections: The first SAS port of the 12 Gbit/s SAS interface modules inserted in slots L5 and R5 of a 6 U controller enclosure must be connected to a disk enclosure with coffer disks.

Procedure

  1. Connect expansion port P0 on slot B0 of the controller enclosure to the PRI expansion port on expansion module B of disk enclosure 1.
  2. Connect the EXP port on expansion module B of disk enclosure 1 to the PRI port on expansion module B of disk enclosure 2.
  3. Connect the PRI port on expansion module A of disk enclosure 2 to the EXP port on expansion module A of disk enclosure 1.
  4. Connect the PRI port on expansion module A of disk enclosure 1 to expansion port P0 on slot A0 of the controller enclosure. Then, a loop is formed.

    NOTE:
    • The procedure uses a 3 U controller enclosure connected to four disk enclosures as an example to describe how to connect cables.
    • Disk enclosure 1 is typically the configuration disk enclosure.
    • For details about how to connect cables for the expansion loop that contains the configuration disk enclosure, see Step 1 to Step 4. In the loop, if the configuration disk enclosure is faulty, the loop fails. However, if any one of the other disk enclosures is faulty, the loop does not fail, preventing single points of failure.

  5. Connect expansion port P1 on slot A0 of the controller enclosure to the PRI port on expansion module A of disk enclosure 3.
  6. Connect the EXP port on expansion module A of disk enclosure 3 to the PRI port on expansion module A of disk enclosure 4.
  7. Connect the EXP port on expansion module B of disk enclosure 4 to the PRI port on expansion module B of disk enclosure 3.
  8. Connect the PRI port on expansion module B of disk enclosure 4 to expansion port P1 on slot B0 of the controller enclosure. Then, a loop is formed to prevent single points of failure from occurring on the two disk enclosures below the controller enclosure.

    NOTE:

    For details about how to connect cables for an expansion loop that does not contain the configuration disk enclosure, see Step 5 to Step 8. In this loop, if any one of the disk enclosures is faulty, the loop does not fail, preventing single points of failure.

  9. Perform Step 5 to Step 8 to connect the remaining disk enclosures.

    After a disk enclosure is connected into a storage system and powered on, do not change its position in the storage system; otherwise, its enclosure ID cannot be correctly displayed, its performance may deteriorate, and part of its storage resources may become unavailable.

  10. Lay out and bind mini SAS cables.

    NOTE:

Follow-up Procedure

If SAS cables need to be removed during the installation, perform the following steps. The operations of removing a SAS optical cable are similar. SAS cable is used as an example here.

  1. Grip the SAS cable and push the connector slightly inward, as shown in Figure 6-13.
    Figure 6-13 Pushing the connector slightly inward

  2. Hold the plastic ring and pull it outward in the arrow direction until the SAS cable is unlocked, as shown in Figure 6-14 and Figure 6-15.
    • Figure 6-14 shows the top view of removing a SAS cable.
    • Figure 6-15 shows the bottom view of removing a SAS cable.
    Figure 6-14 Top view of removing a SAS cable

    Figure 6-15 Bottom view of removing a SAS cable

  3. Pull out the SAS cable connector out of the expansion port entirely.
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Updated: 2019-07-11

Document ID: EDOC1000181531

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