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Dell SRDF Introduction

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Mixed configurations

PowerMaxOS 10

Arrays running PowerMaxOS and HYPERMAX OS support a single front-end emulation of each type (sych as FA and EF) for each node, but each of these emulations supports a variable number of physical ports. Both the SRDF Gigabit Ethernet (RE) and SRDF Fibre Channel (RF) emulations can use any port on the node. The relationship between the SRDF emulation and resources on a node is configurable: 1 node for 1 or multiple CPU cores for 1 or multiple ports.

Connectivity is not bound to a fixed number of CPU cores. You can change the amount of connectivity without changing CPU power.

The SRDF emulation supports up to 16 front-end ports per node (4 front-end modules per node), any or all of which can be used by SRDF. Both the SRDF Gigabit Ethernet and SRDF Fibre Channel emulations can use any port.
NOTE:If hardware compression is enabled, the maximum number of ports per node is 12.

For example, when one array in an SRDF configuration is running PowerMaxOS, and one array is running HYPERMAX OS, specify only the node ID on the array running HYPERMAX OS, and specify both the node ID and port number on the array running PowerMaxOS.

Mixed configurations PowerMaxOS 5978 and earlier, or HYPERMAX OS 5977 and Enginuity 5876

For configurations where one array is running Enginuity 5876, and the other array is running PowerMaxOS 5978 or HYPERMAX OS 5977, these rules apply:
  • On the 5876 side, an SRDF group can have the full complement of directors, but no more than 16 ports on the PowerMaxOS or HYPERMAX OS side.
  • You can connect to 16 directors using one port each, 2 directors using 8 ports each or any other combination that does not exceed 16 per SRDF group.

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