External 2-port or
4-port SAS HBA
Figure 5-1: SAS HBA maximum configuration
5.4.2 RAID adapter maximum Configuration
Always use dual path connection with one path to each IOM module to provide high availability. Please
choose the correct RAID adapter profile to be able to support 90 drives in D4390. 940-8e can support
up to one D4390 enclosure with dual path connection.
External 2-port
RAID Adapter
Figure 5-2: Redundant configuration
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