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Chapter 2: Hardware installation
Component
Description
RAID configuration
•
Two logical drives; each has eight member drives. You can create
more logical drives from the drives in the expansion systems.
•
LD0 mapped to CH0 AID, CH1 BID. LD must be assigned to
controllers A and B to enable remote replication.
•
LD1 mapped to CH1 BID, CH0 AID. LD must be assigned to
controllers A and B to enable remote replication.
2.3.5 Hybrid host connections
For hybrid systems that feature two additional iSCSI ports, you can use these systems for remote
replication or for host LUN mapping.
Single Hybrid Unit Connected to FC/iSCSI Hosts
NI C
HBA 0
HBA 1
NI C
HBA 0
HBA 1
CH0 FC
CH1 FC
CH4 iSCSI
CH5 iSCSI
Ethernet
NI C
HBA 0
HBA 1
NI C
HBA 0
HBA 1
When connected to FC and iSCSI hosts, the connections are working in their respective speeds. This
connection maximizes the number of connections while keeping the optimum performance gained by
the high-speed FC link and FC switch.
NOTES:
• To gain optimum performance, ensure that the LAN switch (1) for the management station (2), the
LAN switch for the systems, and the iSCSI switch (3) for iSCSI host link are separated.
•
If they are not separated, the host may consider that the iSCSI connection is a part of the host
connection and might use it for data I/O, even if the iSCSI ports are not mapped to the host.
As a result, the data transaction speed slows down to iSCSI connection’s level and the fast FC
connection bandwidth may be spent without use.
