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DD860 and DD890 system cabling

After you determine the number of each model of shelf to be used, plan your racking

based on the appropriate configuration shown below. For example, if you have two

ES20s and three ES30s, use Configuration A below. Distribute or re-distribute the

shelves across the sets as shown for your configuration. The goal is to distribute the

shelves as equally as possible.

Note

The tables show the HBA ports used to connect each set to the Data Domain

controller.

Table 13 Configuration A: 1-to-6 ES20 and 1-to-6 ES30 shelves

1-6 ES20s 1-6 ES30s

HBA Ports 3a-2b HBA Ports 2a-3b HBA Ports 3c-2d HBA Ports 2c-3d

ES20 ES20 ES30 ES30

Table 14 Configuration B: 7-to-9 ES20 and 1-to-3 ES30 shelves

7-9 ES20s 1-3 ES30s

HBA Ports 3a-2b HBA Ports 2a-3b HBA Ports 3c-2d HBA Ports 2c-3d

ES20 ES20 ES20 ES30

Table 15 Configuration C: 1-to-3 ES20 and 7-to-9 ES30 shelves

1-3 ES20s 7-9 ES30s

HBA Ports 3a-2b HBA Ports 2a-3b HBA Ports 3c-2d HBA Ports 2c-3d

ES20 ES30 ES30 ES30

When there are seven shelves of one type, to minimize re-cabling, configure them as

3-3-1, two sets of three shelves and a fourth set of one. A 3-2-2 configuration is also

acceptable.

DD OS 5.1 and later support four shelves per sets for the DD860 and DD890 systems.

The additional shelves per set provide flexibility for ES20/ES30 configurations and for

combining shelves with 1 TB or 2 TB drives. When adding shelves to a DD860 or

DD890, you have the option of adding a fourth shelf to any set of the same type.

Installing the Shelves

34 Data Domain ES30 Expansion Shelf and FS15 SSD Shelf Hardware Guide

Dell EMC Data Domain FS15 SSD Shelf User Manual

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