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EMC Fibre Channel with QLogic HBAs in Windows Hosts
Configuring an EMC Boot Device
Trespassing the Boot
LUN Using atf_trespass
Follow these steps to use the atf_trespass command to trespass the
boot LUN:
1. Boot the host and log in to Windows.
2. Windows NT 4.0 will have the boot LUN configured for ID 0 as
described under Preparing the Storage System on page 3-13.
For Windows 2000, follow these steps to determine the LUN ID of
the boot LUN as seen by the host:
a. From the Windows task bar, select Start, Programs,
Administrative Tools, Computer Management.
b. On the Computer Management window, click Disk
Management.
c. Locate the System disk in the list. This is typically Drive
C:\
and will be noted with (System).
d. Select the Disk X description area, and from the Action menu,
select Properties.
A display appears with a line similar to the following:
Device Type: SCSI (Port: 3, Target ID: 1, LUN:0)
e. Find this Device Type line and note the LUN value. In this
example, the LUN value is 0. This is the Host LUN ID you will
need in the next step.
3. Open a command window and direct the multipath and failover
software to trespass the LUN. If you are using ATF, open a
command prompt and change to the multipath and failover
software directory; then enter the
atf_trespass command:
• If the boot LUN is owned by SP A, enter commands in the
following form to transfer it to SP B:
cd Program Files\emc\atf
atf_trespass atf_sp0 1:1:
n
where
n
is the Host LUN ID you discovered in step 2.
• If the boot LUN is owned by SP B, enter commands in the
following form to transfer it to SP A:
cd Program Files\emc\atf
atf_trespass atf_sp0 0:1:
n
These commands transfer the boot LUN to the other SP so you
can configure it for failover in the HBA BIOS.