Advantech ASR-5300I Series, User Manual

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43 ASR-5300I Series Hardware User Manual
Chapter 3
S
ystem
Connection
The preceding image shows connections where each SFP port is connected to FC
switches and then to host adapters. See logical associations in the drawing for LUN
mapping details.
Use enclosure-specific spares to prevent a spare drive from participating in the
rebuild of a logical drive on another enclosure.
Users can refer to the ID tags on the host links to view the related LUN mapping and
cable link routing paths.
Each logical partition is mapped to a single host channel ID. If you prefer path
redundancy, you can map a logical partition to IDs residing on two different channels.
You will then need the EonPath driver to manage access through two different HBA
ports. The driver communicates with system firmware and performs load balancing
and automated distribution of I/Os.
If multiple servers can detect a mapped volume, users must avoid access contention
by using file-locking software, port binding, or zoning feature by FC switches, which
limit access from the host to a specific LUN. If there are two servers in a clustered
configuration, access control will be performed by the clustering software.
3.4 SAS-Host RAID Connections
One SFF-8088-to-SFF-8088 host link cable is included per controller. If more cables
are needed, contact your vendor to purchase additional cables.
The cables (28AWG x 8 pairs) characterized by 100ohm, black, UL-approved, lead-
free, 50, 120 or 170cm cable lengths; connectors can be secured to the chassis
receptacle using the latching mechanism.
Channels Controller A
Host CH0, CH1, CH2, CH3
Configuration Information
RAID controller 1
Host server 4
Data path connection
Data paths are attached to one or more FC switches. SAN
management measures, such as switch zoning and port bind-
ing, should be taken to prevent multiple servers from accessing
the same LUN.
Host channel bandwidth 3200 MB/s
Warning! All SAS cables are sensitive and must be handled with care. To prevent
interference within a rack system, the cable routing path must be care-
fully planned and the cables not bent.