Chapter 4: Subsystem Connection and Operation
Figure 4-3: High Availability IP SAN with Multiple Connections per Session
NOTE:
In the event of single controller failure, a logical drive is accessed through the
host IDs managed by the alternate RAID controller. Host IDs and port IPs do not
fail-over to the surviving controller. Therefore, the EonPath multi-pathing driver is
necessary for path redundancy and controller failover.
iSCSI Topology and Host LUN Mapping:
Configuration Details:
․
A logical drive can be associated with several SCSI IDs on separate
channels making it a RAID volume accessed through different data
paths. The default ID on every host channel is ID#0. More can be
created if the need arises.
․
You can manually include or exclude specific iSCSI initiators from the
access list to you iSCSI arrays. A number of access conditioning
factors can be included: IQN, NetMask value, CHAP, and IP
addresses can be associated with a RAID array (a logical drive). In
this way, only the authorized host adapters can access your arrays.
․
In the sample above, 2 logical drives are created, each containing 6
member drives. Depending on your demands for logical RAID
volumes, specific array parameters such as spare drives, RAID level,
and stripe size/width, can be specified when creating logical drives.
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