Dell Unity XT 480 Unity All Flash and Unity Hybrid Unity 480/F Unity 680/F Uni - Page 28

Cabling the DPE to a DAE

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CL5994 Figure 20. Rail tabs securing the rear of the enclosure 2. Secure the front of the enclosure to the front vertical channels with four screws (two per side), but do not tighten the screws until they are all in place. Figure 21. Securing the front of the enclosure Cabling the DPE to a DAE If you have one or more DAEs, cable the DAEs to the DPE back-end ports so that the storage is available in the system. Ensure that the DAE is located close enough to route and connect to the DPE using the two-meter DPE-to-DAE interconnect cables. Five-meter and ten-meter interconnect cables are available when connecting enclosures across multiple racks. NOTE: General DAE back-end bus configuration rules: 1. Maximum number of enclosures per bus is 10. 2. Maximum number of drive slots per bus is 250, up to specific system limitations for drive slots. 3. For best performance, it is recommended that you evenly distribute DAEs across the available back-end buses. Consider the maximum number of drives that can be installed in the storage system model. DAEs can be added to the system while the operating system is active, and up to the DAE and drive slot limit for the storage system. DAEs or drive slots that are over the system limit cannot operate in the system. 28 Installation Procedures

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CL5994
Figure 20. Rail tabs securing the rear of the enclosure
2.
Secure the front of the enclosure to the front vertical channels with four screws (two per side), but do not tighten the
screws until they are all in place.
Figure 21. Securing the front of the enclosure
Cabling the DPE to a DAE
If you have one or more DAEs, cable the DAEs to the DPE back-end ports so that the storage is available in the system.
Ensure that the DAE is located close enough to route and connect to the DPE using the two-meter DPE-to-DAE interconnect
cables. Five-meter and ten-meter interconnect cables are available when connecting enclosures across multiple racks.
NOTE:
General DAE back-end bus configuration rules:
1.
Maximum number of enclosures per bus is 10.
2.
Maximum number of drive slots per bus is 250, up to specific system limitations for drive slots.
3.
For best performance, it is recommended that you evenly distribute DAEs across the available back-end buses.
Consider the maximum number of drives that can be installed in the storage system model. DAEs can be added to the
system while the operating system is active, and up to the DAE and drive slot limit for the storage system. DAEs or drive
slots that are over the system limit cannot operate in the system.
28
Installation Procedures