IBM TotalStorage DS300 Best Practices Manual page 541

d. Select now the target which owns the logical drive to boot from. In this
case the logical drive is owned by controller A and the initiator
WOLGA-SLOT3-(0) (HBA1) is allowed to access the port FC0 of controller A.
Press Enter. See 9.2.3, "TotalStorage DS400 setup" on page 504.
Figure 9-112 Fibre channel targets
When you select the second target in the list an error message is received
that the selected device is not a disk device. Please remember that the
HBA is not allowed to access this target at the moment. This is required to
have only a logical drive only over a single path accessible during the
installation of Microsoft Windows Server 2003. This is a limitation by the
operating system. The same is the case for the second HBA.
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Chapter 9. TotalStorage DS400 installation