I have an IBM Blade HS21 with two FC HBAs. Each HBA connects to a separate FC switch and each switch connects to both processors on our EMC Clariion cx-300 SAN. In theory, the blade has four paths to a given LUN (assuming proper zoning and masking). I have created a LUN to boot from SAN and assigned it to Storage Processor A (SPA). The SAN is active/passive. Here are the paths to the LUN:
Option HBA Switch SP
1 1 1 A
2 1 1 B
3 2 2 A
4 2 2 B
From reading documentation, I gather that I can only use active paths to the LUN (options 1 and 3). Am I correct? Why cannot I use all four paths?
You need to enable BOOT BIOS within the HBA of on your blade then make the necessary connections within these screens to connect to a specific LUN as the boot LUN. My book goes through these steps for both qlogic and Emulex.
Edward L. Haletky
VMware Communities User Moderator, VMware vExpert 2009
Author of the book 'VMWare ESX Server in the Enterprise: Planning and Securing Virtualization Servers', Copyright 2008 Pearson Education.
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