On a FlashArray//X20 (R2 or R3) , the default Fibre Channel configuration is a 2-port FC card installed in Slot 2 .
The FlashArray//X hardware architecture differentiates slot usage based on the controller model:
Entry Level (X10/X20): These controllers have a limited number of PCIe lanes and slots available for user expansion. Slots 0 and 1 are often utilized by internal system components or reserved. Therefore, the primary Host I/O card (FC or iSCSI) is standardly installed in Slot 2 . Additionally, due to the entry-level positioning, the 2-port card is the standard default (though 4-port is supported).
Performance Level (X50/X70/X90): As seen in previous questions, these models prioritize Slot 0 for Host I/O and typically default to 4-port cards.
The distinction is critical for Implementation Engineers to ensure they are cabling the correct ports. For an X20, cabling Slot 0 (if a port is even visible) would be incorrect; the active host ports are in Slot 2.
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