EMC Qlogic QLA23xx - Manual (Page 12)

1
1-4 EMC Fibre Channel with QLogic HBAs in Windows Hosts
Introduction
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.
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.
HBA 0
HBA 1
HBA 2
PHYSICALDRIVE0
PHYSICALDRIVE4
PHYSICALDRIVE8
Windows
Host
HBA 0
HBA 1
HBA 2
Windows
Host
PHYSICALDRIVE0
PHYSICALDRIVE4