EMC QLA23xx, QLA22xx manual PHYSICALDRIVE0 PHYSICALDRIVE4 PHYSICALDRIVE8

1

Introduction

Windows

Host

HBA 0

HBA 1

HBA 2

PHYSICALDRIVE0

PHYSICALDRIVE4

PHYSICALDRIVE8

The next figure shows the same host after the cable attached to HBA0 has been removed and the host rebooted. Since 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.

Windows

Host

HBA 0

HBA 1

HBA 2

PHYSICALDRIVE0

PHYSICALDRIVE4

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.

1-4 EMC Fibre Channel with QLogic HBAs in Windows Hosts