CX4 EMC Storage Platforms

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  • Product Info
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EMC CLARiiON CX4 models:

  CLARiiON CX4-120
CLARiiON CX4-240
CLARiiON CX4-480
CLARiiON CX4-960

Maximum Array capacity

120 TB

234 TB

474 TB

954 TB

Maximum HA hosts





Maximum LUNs





Storage System Host ports

4 FC and 4 iSCSI

4 FC and 4 iSCSI

8 FC and 4 iSCSI

8 FC and 4 iSCSI

System memory

6 GB

8 GB

16 GB

32 GB

Maximum Drives per system




480 or 960

Supported Disk types

Fibre Channel, SATA II, LP SATA II, and Enterprise Flash Drives

Fibre Channel, SATA II, LP SATA II, and Enterprise Flash Drives

Fibre Channel, SATA II, LP SATA II, and Enterprise Flash Drives

Fibre Channel, SATA II, LP SATA II, and Enterprise Flash Drives

Host OS supported

Windows*, Linux*, Solaris*, HP-UX*, AIX*, VMware*

Windows*, Linux*, Solaris*, HP-UX*, AIX*, VMware*

Windows*, Linux*, Solaris*, HP-UX*, AIX*, VMware*

Windows*, Linux*, Solaris*, HP-UX*, AIX*, VMware*


* iSCSI Connectivity

EMC CLARiiON CX4: Product Info

EMC CLARiiON Family; Get the high availability, scalability, and flexibility you need to manage and consolidate more data. Combine easy-to-use midrange networked storage with innovative technology and robust software capabilities. The EMC CLARiiON Storage Family consists of the AX, CX3 and CX4 series.

The EMC CLARiiON CX4 series with UltraFlex technology is based on a breakthrough architecture and extensive technological innovation, providing a midrange storage solution that cannot be matched by any competitor. The CX4 series with UltraFlex technology delivers industry-leading application performance, and new levels of scalability, reliability, flexibility, and affordability. It also includes new levels of ease of use, making the CX4 easy to install, manage, and scale. The CX4 is the fourth-generation CX series, and continues EMC's commitment to maximizing customers' investments in CLARiiON technology by ensuring that existing resources and capital assets are optimally utilized as customers adopt new technology.

The unique modularity of the UltraFlex technology allows you to use a combination of protocols within a single storage system. The CX4's architecture is based on state of the art I/O interconnect PCI Express technology, enabling it to provide high bandwidth and low latency. Furthermore, as your requirements change, you can use CLARiiON's unique virtual LUN technology to dynamically move data from one tier of storage to a higher or lower tier within the same CX4 storage system.

The breakthrough CX4 architecture delivers cutting edge performance, including the highest levels of resiliency and availability; tiered storage flexibility; and powerful, easy to use interfaces. CX4's UltraFlex technology provides you with the flexibility of using a combination of FC and iSCSI connections.

Initial tiered storage configurations are simplified due to the CX4's ability to detect the characteristics of drives as they are added. Furthermore, as your requirements change, CLARiiON's unique virtual LUN technology can move data from one tier of storage to a higher or lower tier of storage without disrupting the host application.


EMC CLARiiON CX4 delivers:

Next generation CX architectureProvides leading performance, new levels of scalability, and even higher resiliency.
CLARiiON storage efficiency products Improved performance and lower storage costs using FAST (sub-LUN), FAST Cache, and Compression. EMC CX4 DAE delivers efficiency in cross compatability and performance.
Unified Storage Management Across CLARiiON, Celerra, and RecoverPoint with EMC Unisphere software, a single sign on an intuitive interface. Utilize the CLARiiON Array in a unified environ
Lowest cost of ownershipConsolidate twice the workload in a single system and future proof your investment via EMC UltraFlex technology.
Power Saving TechnologiesFlash drives, low power SATA drives, and drive spin down provide the best energy efficiencies.
Proven CLARiiON Disk five-nines availabilityMultipath data access, automated system diagnostics, online upgrades, and global hot-spare technology resulting in no single points of failure.
Optimized for virtualized environmentsVMware integration and the reliability, high availability, and software functionality required for all virtualized environments.
Advanced information protection capabilitiesLocal snapshots, clones, or continuous data protection (CDP) options; synchronous and asynchronous remote replication.
Ease of use capabilitiesCustomer replaceable components including non-disruptive replacement of disk drives, power supplies, fans, and small-form-factor-pluggable optical transceivers.

CLARiiON EMC CX4 Resources, Reports, & White Papers

Data and Specification Sheets

CX4 Data Sheet: Essential data, features & benefits, and usage relevant to EMC CLARiiON CX4 Storage Systems.
CX4 Data Sheet 2: An overview of the CLARiiON CX4 series, usage, and technical specifications
Intro to CX4 Series: Introduction to CLARiiON CX4 series featuring UltraFlex technology.
Product Analysis: A full analysis and scope of the CLARiiON CX4 EMC series by The Evaluator Group.
System Fundamentals: System Fundamentals for Performance and Availability: Applied Best Practices of EMC Storage CLARiiON.
XenServer Configuration: Overview and Configuration Guide for Citrix XenServer and CLARiiON CX4 Systems.

CLARiiON CX4 EMC Resources, Reports, & White Papers

Data and Specification Sheets

Deploying Oracle VM2.2: This whitepaper examines the deployment considerations and best practices of Oracle VM on CLARiiON EMC storage.
High Density Rack Systems: Create space-efficient storage systems with high capacity SATA disk drives, and twice the density per unit of rack space
Archiving MS Exchange 07: This document describes the architecture of an EMC solution built at EMC's Global Solutions labs.
Intro to DDSD: An introduction to disk drive spin down technology.
Flash Drives for Oracle DB: Deployment of Oracle Database with Enterprise Flash (Solid State Drives, SSD) Drives on CLARiiON CX4 systems.
DC Power Systems: Introduces the full architecture and functionality of CX4 UltraFlex series DC-powered systems.
SSD for MS SQL 08: CLARiiON CX4 implementation of Enterprise Flash Drives for MS SQL Server 2008.

CLARiiON EMC Architecture: EMC CX4 Architecture

Components/Connectivity CX4 Model 120 CX4 Model 240 CX4 Model 480 CX4 Model 960
Processor Architecture per SP 1 dual-core processor 1.2 GHz 1 dual-core processor 1.6 GHz 1 dual-core processor 2.2 GHz 2 quad-core processors 2.33 GBz
Physical Memory per SP 3GB 4GB 8GB 16GB
Max Cache 600MB 1.264GB 4.5GB 10.764GB
Max Write Cache 600MB 1.264GB 4.5GB 10.764GB
Max Drives per Storage System 120 240 480 960
Min Drives per Storage System 5 5 5 5
Max Initiators per Storage System 256 512 512 1024
Max H/A Hosts per Storage System 128 256 256 512
Max LUNs per Storage System 1024 1024 4096 4096
Max RAID Groups per Storage System 60 120 240 480
Max Drives per RAID Group 16 16 16 16
Max LUNs per RAID Group 256 256 256 256
SPE Form Factor 2U 2U 2U 4u
Minimum Configuration Form Factor 6U 6U 6U 9U
SnapView Snapshots 512 512 1024 2048
SnapView Clones 256 512 1024 2048
MirrorView/S 128 256 512 512
MirrorView/A 100 100 100 100
SAN Copy Yes Yes Yes Yes
146, 300 and 450GB 4 GB/s 15K rpm Fibre Channel Yes Yes Yes Yes
400GB 4 GB/s 10K rpm Fibre Channel Yes Yes Yes Yes
1 TB 4 GB/s 7.2K and 5.4K rpm SATA-II Yes Yes Yes Yes

SANStorageDirect: EMC CLARiiON CX4

EMC CLARiiON CX4 Storage Success

Methods to Increase Success unsing EMC CLARiiON CX4 Storage Platforms


EMC CLARiiON CX4 Storage is a valuable component to any storage infrastructure. However, this platform is not accessible to every storage environment based on budgetary constraints, or it is believed that scalability within the CLARiiON EMC platform will be a burden on storage budgets. This is a myth and we will delineate the myth from reality in how you can easily and feasibly implement and scale CX4 EMC storage platforms within your storage environment.


1) EMC CX4 systems come in many shapes and sizes; determine which best suits your needs and understand the compatibility of that system between DAE's and HDD's


2) CLARiiON CX4 systems scale very easily and to a great data size; understand how much data you need and how this data needs to be accessed. Use this information to determine the drive type most relevant to your data. In many scenarios, you do not need FC or iSCSI; SATA drives work very well in many applications.


3) Performance vs. Practicality in EMC CLARiiON CX4 systems: Sata vs 10K vs 15K and even taking Solid State Drives into consideration. Which is best for you and which presents the best cost/benefit ratio? This evaluation must be done by your team as well as the vendor you decide to work with. In no way is this a cookie cutter analysis or solution, so don't approach it in that mentality.


4) Feasible Scalability in CLARiiON EMC: Hindsight is 20/20, but foresight is priceless. Look into the future, analyzing data trends and predicting growth patterns are sure fire techniques to prevent chasing your data growth curve. Staying ahead of data growth provides the ability to control growth, predict when and how upgrades are implemented, and, most importantly, allows the needed time to properly implement the correct upgrade for each scenario.


5) Getting the Most out of your EMC CX4 Storage:

  • More Spindles = Higher Performance: Instead of a DAE populated with 300GB 15K drives, consider 4 DAE's populated with 76GB 15K drives. This provides less weight on each drive and more spindles across the system, allowing a higher access rate and speed.
  • Always explore the Used/Refurbished CX4 EMC Storage route: Used and Refurbished CX4 EMC storage options can save up to 70-90% off of EMC list price in many situations. Pursuing this route will open many opportunities for your company to rapidly and efficiently expand within your Storage Environment. Upgrades, DR Systems, Test/Dev environments, QA systems are all much more feasible when taking Used EMC CLARiiON Storage Solutions into consideration.
  • Find the best RAID configuration for you: RAID has a major impact on raw vs. usable data size. Take this into consideration when implementing a RAID policy across your storage systems.