EMC QLogic User Manual

Page 12

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EMC Fibre Channel with QLogic HBAs in the Windows Environment

Introduction

The next figure shows the same host after the cable attached to HBA0
has been removed and the host rebooted. Because Windows was not
able to do a discovery on HBA0, it assigned \\PHYSICALDRIVE0
to the first device it discovered. In this case, that first device is
connected to HBA1. Due to the shift, any software application
accessing \\PHYSICALDRIVE0 will not find data previously
written on the original \\PHYSICALDRIVE0.

The default driver behavior does not store target bindings between
host reboots. The bindings are dynamically generated by the HBA
when new target devices are detected.

Tape devices are treated the same as disk devices in Windows with respect to
persistent binding. Refer to your tape device documentation for more
information.

HBA 0

HBA 1

HBA 2

PHYSICALDRIVE0

PHYSICALDRIVE4

PHYSICALDRIVE8

Windows

Host