Pure Storage FlashArray-Implementation-Specialist Question Answer
On FlashArray//XL, which slots support a 4-port FC card?
A.
5 and 8
B.
3 and 8
C.
2 and 8
The Answer Is:
B
This question includes an explanation.
Explanation:
The FlashArray//XL chassis is designed with specific PCIe lane allocations to support high-performance host I/O and backend connectivity. The 4-Port Fibre Channel (FC) cards are high-bandwidth devices that require x16 PCIe lanes to function at full line rate without oversubscription.
In the FlashArray//XL architecture, PCIe slots 3 and 8 are designated x16 slots capable of supporting these dense 4-port host interface cards. Other slots, such as slot 5 or slot 2, may be x8 slots or reserved for other functions (like the backend SAS/Ethernet fabric or offload engines like the DCA), and thus may not physically accept or electrically support the 4-port card variant.
Implementation Engineers must adhere strictly to the slot map provided in the hardware guide. Installing a 4-port card into an unsupported slot (like an x8 slot) could lead to the card not training, the array failing to boot, or the card operating at reduced bandwidth, severely impacting host performance. Verifying the BOM and slot map for Slots 3 and 8 ensures the correct electrical and thermal environment for these critical host-facing components.
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