Dell EMC AX4-5 manual Cluster Storage Requirements

Cluster Storage

Cluster nodes can share access to external storage systems. However, only one of the nodes can own any redundant array of independent disks (RAID) volume in the external storage system at any time. Microsoft Cluster Services (MSCS) controls which node has access to each RAID volume in the shared storage system.

Table 1-2 lists supported storage systems and the configuration requirements for the cluster nodes and stand-alone systems connected to the storage systems.

Table 1-2. Cluster Storage Requirements

Hardware Components	Requirement
Supported storage	One to four supported Dell/EMC storage systems. For
systems	specific storage system requirements see Table 1-3.
Cluster nodes	All nodes must be directly attached to a single storage
	system or attached to one or more storage systems
	through a SAN.
Multiple clusters and	Can share one or more supported storage systems using
stand-alone systems	optional software that is available for your storage system.
	See "Installing and Configuring the Shared Storage
	System" on page 41.

The storage systems work together with the following hardware components:

•Disk processor enclosure (DPE)—Configured with storage processors that control the RAID arrays in the storage system and provide storage functionalities such as snapshots, LUN masking, and remote mirroring.

•Disk array enclosure (DAE)—Provides additional storage and is attached to the disk processor enclosure.

•Standby power supply (SPS)—Provides backup power to protect the integrity of the disk processor write cache. The SPS is connected to the disk processor enclosure

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Introduction