Dell PowerVault 770N (Deskside NAS Appliance) - Manual (Page 6)

Storage System
NAS Fibre Channel clusters support the Dell | EMC CX200, CX400, and CX600 systems—modular 2-Gb/s Fibre Channel storage
systems that provide scalable storage solutions in a direct-attached or SAN-attached environment.
These storage systems consist of multiple hardware components that work together as a single system. These components
include:
Processor enclosure (DPE or SPE)
Disk array enclosure (DAE2)
Standby power supply
Host bus adapter
Processor Enclosure
The processor enclosure is configured with storage processors that control the RAID arrays in the storage system and provide
various storage functionalities, such as snapshots, LUN masking, and remote mirroring.
The CX200 and CX400 are DPEs and are configured with internal hard drives. The CX600 is a storage processor enclosure
(SPE) and is not configured with internal hard drives. For primary storage, the SPE must be attached to one or more 2-Gb/s
DAEs. The DPE and SPE are controlled by the core software (FLARE), which hosts the Navisphere® management software and
manages the workload between the storage processors and the hard drives.
The SPE requires two standby power supplies (SPS) to provide backup power to the SPE storage processors and the first
DAE2 or DAE2-Operating System (DAE2-OS) enclosure that is connected to the SPE. If a power failure occurs on the SPE, the
backup power allows the SPE to transfer unprocessed write cache to the DAE2 vault disks before it shuts down, thereby
preventing data loss. See Table 1-13 in for additional information.
NOTE: The DAE2 and DAE2-OS are 2-Gb/s DAE enclosures. The DAE2-OS enclosure is the first DAE2 enclosure that is
connected to the CX600 and has the core software (FLARE) preinstalled on the first five hard drives. These first five
hard drives are called the vault disks.
The processor enclosure includes the following features:
Two to four 2-Gb/s front-end ports per storage processor, providing redundant paths to the storage system. If one of
the paths fail for any reason, the data is routed through the redundant path until the failed path is repaired.
EMC ControlCenter Navisphere management software for storage system management, including:
SnapView (for point-in-time data copies)
MirrorView (for remote synchronous data mirroring)
SAN Copy (for moving data between Dell | EMC storage systems)
NOTE: The CX200 does not support SnapView and Mirrorview.
Supports nondisruptive upgrades for software and firmware.
Storage for multiple clustered and nonclustered hosts.
Supports RAID 0, 1, 1/0, 3, and 5.
Compatible with the Dell | EMC FC4700 and FC4700-2 storage systems as a MirrorView target or source.