Dell PowerVault 775N (Rackmount NAS Appliance) - Manual (Page 7)

Cluster Platform Guide.
Crossover
cable
One Ethernet crossover cable for the node-to-node cluster interconnect (private network).
Keyboard
and monitor
A keyboard and monitor are required for troubleshooting the cluster nodes.
RAID Controllers
Table 1-5 lists the Dell PowerEdge™ Expandable RAID controllers (PERC) that are used to connect the PowerVault 770N and
775N systems to external PowerVault storage systems. See the PERC documentation included with your system for a
complete list of features.
NOTE: Table 1-5 lists the RAID controllers that are connected to the external storage system(s). Your NAS system
also contains an internal RAID controller that is used to manage the system's internal hard drives.
Table 1-5. RAID Controller Features
Feature PERC 3/DC PERC 4/DC
SCSI channels 2 2
SCSI data transfer rate Up to 160 MB/s per channel Up to 320 MB/s per channel
Maximum number of drives per
channel
14 14
RAID levels RAID 0, 1, 1+0, 5, and 5+0 RAID 0, 1, 1+0, 5, and 5+0
Number of supported logical drives
and arrays
Up to 14 logical drives and 32 arrays per
controller
Up to 14 logical drives and 32 arrays per
controller
Cache 128 MB 128 MB
NOTE: RAID 0 and independent drives are possible but are not recommended for a high-availability system because they do
not offer data redundancy if a disk failure occurs.
PowerVault NAS System Specific Network Components
Figure 1-1 shows a sample configuration of the PowerVault 770N SCSI cluster components and cabling. Figure 1-2 shows a
similar sample configuration for the PowerVault 775N SCSI cluster.
See the Platform Guide for system-specific configuration information.
Figure 1-1. PowerVault 770N Cluster Solution