EMC Qlogic QLA23xx - Manual (Page 58)

3
3-26 EMC Fibre Channel with QLogic HBAs in Windows Hosts
Configuring an EMC Boot Device
Assigning a
Permanent Boot
Drive Letter for
Windows NT If you have installed failover software into a Windows NT 4.0 server,
it is good practice to hard-code the boot volume letter so that it does
not change when rebooting after a LUN trespass. This can be done by
using the following procedure (from MSKB Q153619):
1. Reassign all drive letters (including C: and the CD-ROM drive) to
higher available letters. (You must do this or C: will be taken once
it becomes available. After reassigning C:, you should receive a
message requiring you to reboot for the new assignment to take
effect.
2. Reboot the server.
On system restart you may receive virtual memory errors; this is normal.
3. Rename all drives to their original letters.
4. Reboot and make an ERD of the new configuration.
Installing Multipath
and Failover
Software Multipath and failover software on the host can transfer control of
storage system LUNs on a hardware failure in a LUN path.
Important: If the Navisphere Host Agent is installed, you must
remove it before installing multipath and failover software. (Refer to
the documentation that came with your failover software.) Reinstall
the host agent after installing the multipath and failover software.
Follow these steps to set up the multipath and failover software:
1. Install the software as described in the your EMC ControlCenter
Navisphere Management software, ATF, or PowerPath
documentation.
2. Create and enable a zone for each additional HBA and SP port
that will be supported by the multipath and failover software.
Refer to Known Issues on page 3-35 for any additional information.