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6 Host Network and Direct Connection MDR
Maximum functionality is available when both the Network and Direct Connection are
present. The commands that are not supported or only partially implemented in the in-
dividual modes are fully functional in this combination mode.
6.1 Configuring the MDR for Network & Direct Connec-
tion
The configuration for this option is identical to Chapter 4:
Host Network-Based MDR
,
except with the addition of the VMFC-2100P card as shown in Chapter 5:
Host Direct
Connection MDR
. Addition of this card requires that the
UseHostFcAdapter
parameter
in the Host
mdr.ini
file be set to ‘1’
Because of the lack of VxWorks support of Direct Connection, this mode is available
ONLY for Solaris and Windows NT Hosts (not available for VxWorks Hosts).
It is possible to simultaneously record to and readback from a disk array using the Host
Network & Direct Connection MDR mode. The MDR board records data to the disks
while the Direct Connect reads back data. Recording speed is significantly impacted in
this mode; therefore, the amount of data read back must be kept to a minimum. Note that
tags must be enabled, because the readback operation must verify that the blocks read
back are valid.
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MDR User Guide
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