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Note: Do not connect the DS4200 Express Storage Subsystem Ethernet ports to a
Figure 53. Direct (out-of-band) managed storage subsystems
Connecting hosts to the DS4200 Express
The DS4200 Express supports redundant direct attached connections up to two
hosts. To ensure full protection against the loss of any one fibre channel path from
the host servers to the DS4200 Express Storage Subsystem, always use redundant
host connections by connecting each host to the appropriate single-ported host
channels on both RAID controllers A and B. Using the fibre channel switches, up to
128 hosts can be redundantly attached to the DS4200 Express Storage Subsystem
in a fibre channel SAN fabric.
To connect a host adapter to the DS4200 Express RAID controllers, perform the
following steps:
1. Install SFP modules in host ports on RAID controllers A and B.
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IBM System Storage DS4200 Express Storage Subsystem: Installation, User's and Maintenance Guide
public network or public subnet. It is strongly recommended that you create a
private network between the DS4200 Express Storage Subsystem and the
management station.
Note: The alignment of the single-ported host channels on controller A are
opposite those of controller B. Before inserting an SFP module into a
host port, verify that the SFP module is rotated correctly to match the
alignment of the host port on the RAID controller. Do not force-fit.
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