Dell PowerVault 775N (Rackmount NAS Appliance) - Manual (Page 6)

The following subsections describe the components that are common to the PowerVault NAS cluster, as well as the
components that are specific to each cluster system.
Table 1-3 lists the common components that are used in a PowerVault NAS cluster.
Table 1-3. Cluster Components
Component Description
NAS
systems
Two identical PowerVault 770N or 775N NAS systems in a homogeneous pair with the Windows Storage
Server 2003, Enterprise Edition operating system installed in each system.
NOTE: Dell or Microsoft can support only the specific configurations described in the Dell PowerVault NAS
SCSI Cluster Platform Guide.
Shared
storage
system
Up to four PowerVault 21xS storage systems with dual SCSI expander management modules (SEMMs) or up
to four PowerVault 22xS with dual enclosure management modules (EMMs).
Network
adapters
Supported network adapters for the public LAN.
PowerVault NAS-Specific Network Components
Table 1-4 describes the required components for each PowerVault NAS system.
Table 1-4. PowerVault NAS-Specific Network Components
Hardware
Component
Description
Hot-spare
drive
support
Support for 1-inch SCSI hot-pluggable spare drives.
RAID
controller(s)
One of the following PERC RAID controller(s) installed in each PowerVault NAS system for the cluster's shared
storage:
PERC 3/DC
PERC 4/DC
RAID
support
Support for RAID 1, 5, and 1+0 levels.
RAID 1+0 is supported in a single enclosure or spanning two enclosures with hot-spare drives. RAID 0 and
independent drive configurations can be installed in a PowerVault NAS cluster. Because they do not offer data
redundancy if a disk fails, they are not recommended for a high-availability system.
NOTE: Dell and Microsoft support only the specific configuration described in the Dell PowerVault NAS SCSI
Cluster Platform Guide.
Shared
storage
system(s)
Up to four PowerVault 21xS storage systems with dual SEMMs or up to four PowerVault 22xS with dual
EMMs.
Network
adapters
Two or more network adapters installed in each PowerVault NAS system for the node-to-node cluster
interconnect.
If two network adapters are not installed in the PowerVault 770N NAS system, you must install an additional
network adapter for the private network. PowerVault 775N NAS systems are preconfigured with two onboard
network adapters, which meets the minimum requirements.
NOTE: The network adapters must be identical on both systems.
NOTE: Dell and Microsoft support only the specific configuration described in the Dell PowerVault NAS SCSI