Storage SC4020 All-In-One Array | Dell


More performance, less investment.

Provide all-flash or hybrid storage at an exceptional value, and support up to 10,000 MS-Exchange mailboxes in just 2U of rack space.*

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Product Configurations

  • Internal Storage
    24 x 2.5” drive bays

    Supported expansion enclosures
    Dell SC200: 12 x 3.5” drive bays
    Dell SC220: 24 x 2.5” drive bays
    Dell SC280: 84 x 3.5” drive bays

    Maximum drive count
    192 (24 internal, plus 168 external)

    Total storage capacity
    1.054PB, more in federated systems*

    Supported drive types
    HDD: 15K, 10K, 7.2K RPM; SSD: write-intensive and read-intensive drives in SLC, MLC and TLC formats. Drive types can be mixed in the same system.

    2 controllers per SC4020 array


    Intel® Xeon® Processor E3-1265L v2, 2.50GHz, 4 cores

    32GB per SC4020 array (16GB per controller)

    Network/server connectivity (front-end)

    Fibre Channel model: 8 x 8Gb FC ports per SC4020 array (4 per controller) or 4 x 16Gb FC ports per SC4020 array (2 per controller); simultaneous multiprotocol support available with optional upgrade to firmware v6.6. Management/Replication ports may also provide two ports of front-end iSCSI network I/O per controller.

    iSCSI model: 4 x 10Gb iSCSI ports per SC4020 array (2 per controller); additional iSCSI network connectivity available with optional upgrade to firmware v6.6. Management/Replication ports may also provide two more ports of front-end iSCSI per controller.

    Internal drive connectivity (back-end)
    4 x 6Gb SAS ports per SC4020 array (2 per controller)

    NAS deployment connectivity (optional)
    Supports file-based storage via FS8600 NAS appliance

Technical Highlights

  • Product OS
    Storage Center 6.5

    Server OS
    Microsoft® Windows Server®, Oracle® Solaris, HP®-UX, Oracle Linux, IBM® AIX®, Novell® NetWare, SLES, Apple, HPTru64, VMware®, Citrix® XenServer®, RedHat®

    Supports RAID 0, 1, 5, 6, RAID 10 and RAID 10 DM (dual mirror). Any combination of RAID levels can exist on a single Storage Center. Multiple RAID levels can exist on the same storage tier within an array.


  • Enterprise Manager (included, server-installable), Storage Center Manager (included, on-board browser-based), Enterprise Manager Chargeback, Replay Manager, vCenter Operations Manager plug-in, command-line interface


  • Power/wattage: 2 hot-swappable 580W power supplies; 580W maximum power
    Heat dissipation: 1,978 BTU/hr maximum
    Voltage: 100-240 VAC
    Frequency: 50/60 Hz
    Amperage: 7.6-3.0 A


  • Rack size: 2U
    Height: 8.79 cm (3.46 inches)
    Width: 48.2 cm (18.98 inches)
    Depth: 54.68 cm (21.53 inches)
    Weight at maximum configuration: 24 kg (53 lb)
    Weight empty: 7 kg (15.4 lb)

Environmental Operating Conditions

  • Operating temperature: 50 - 95°F (10 - 35°C)
    Non-operating temperature: -40 - 149°F (-40 - 65°C)
    Operating humidity ranges (non-condensing): 10% to 80% with 29°C (84.2°F) maximum dew point
    Non-operating humidity (non-condensing): 5% to 95% with 33°C (91°F) maximum dew point
    Inlet type: NEMA 5-15/CS22.2, n°42

High performance that fits your budget, including all-flash

To compete with big business, you need efficient, real-time data access to quickly turn customer interactions into transactions and information into insights. The Dell Storage SC4020 puts the high IOPs and low latency your applications demand within reach.
Dell Compellent SC4020 - Extending the benefits of enterprise storage to small- and mid-size deployments
Consider these top features:
  • Auto-tuned for maximum performance and cost-savings based on real-time usage information
  • FLASH-optimized for affordable all-flash or hybrid SSD/HDD deployments
  • Fibre Channel or iSCSI SAN support included, with high-performance scale-out NAS option
  • Perpetual software licensing for low lifecycle costs
  • Award-winning Copilot Support
Dell Compellent SC4020 - World-class intelligence

Enterprise storage features right from the start

Ideal for stand-alone SANs or departmental/branch office deployments, the SC4020 is based on our larger enterprise-class storage solution, SC8000. Designed to support distributed large-scale growth, the overall Dell Storage SC Series portfolio ensures that as your organization grows, so will your ability to store, manage and gain insights from your data.
  • Fully virtualized array eliminates need to pre-allocate RAID groups, increases overall flexibility
  • Automated tiering among all drive types, including HDDs and read- and write-intensive SSDs
  • Space-efficient snapshots, block-level compression, remote synchronous/asynchronous replication, Fast Track disk optimization
  • Comprehensive management tools, including full integration and replication with SC8000

Industry-leading TCO saves more than data

Dual controllers, 24 internal drive slots and high performance Fibre Channel or iSCSI network ports come standard in a space-saving 2U chassis. This compact footprint helps to lower data center energy costs while the automated and intelligent data placement architecture reduces lifecycle hardware costs.
Dell Compellent SC4020 - Unprecedented value
  • Buy fewer and less expensive disks
  • Expand easily to 192 drives using standard Dell Storage enclosures
  • Enables flash solutions for the price of hard drive solutions
  • Data Progression, Dynamic Capacity (thin provisioning), Enterprise Manager and Data Instant Replay (snapshots)
Award-winning Copilot Services

Award-winning Copilot Services

Combining centralized support, product education and sales resources, Dell Copilot Services includes 24x7 active system monitoring to help improve performance and stability.

* Based on Microsoft Exchange JetStress 2013 testing of 24 x 900GB 10K RPM drive SC4020 configuration in February 2014 in Dell Labs. Actual results will vary.
The SC4020 supports all-flash arrays (AFAs), hybrid arrays, or traditional spinning disk solutions. Flexible and scalable, SC4020 lets you start in one configuration, then evolve to another as your needs change.
Dell Storage SC4020 - Entry level all-flash arrays

Entry level all-flash arrays

The entry-level SC4020 single-tier all-flash array (AFA) is one of the industry's most affordable all-flash solutions. Now it’s possible to accelerate workloads today—well beyond the capabilities of spinning disk—and keep your options open to add a tier of higher performing write-intensive SSDs or high-capacity HDDs as your business grows.
Dell Storage SC4020 all-in-one array - Flash-Optimized All-Flash Arrays

Flash-Optimized All-Flash Arrays

Dell’s exclusive Flash-Optimized multi-tier AFAs combine the best features of multiple types of enterprise-class SSDs for the ultimate in simultaneous performance and cost-savings.


Innovative Data Progression technology sends all incoming writes to WI (Write-Intensive) SSDs, to ensure the highest write speeds. Data is then migrated to RI (Read-Intensive) SSDs, offering equivalent read performance at a lower cost.This intelligent automation keeps your applications running smoothly using the least expensive mix of drives. In addition, because the WI “write layer” frees your RI drives from primary writes, they’ll last much longer than drives in competing all-RI arrays.
Dell Storage SC4020 all-in-one array - Hybrid arrays

Hybrid arrays

Both the single and multi-tier AFAs described above may be further expanded and cost-optimized by adding a tier of spinning disks either within the original SC4020 chassis or in one or more expansion enclosures.

SC Series hybrid arrays deliver the best of both worlds – performance plus cost savings. All writes go to Tier 1 SSDs, guaranteeing outstanding performance. Only cold data is moved to spinning disk, but since that can constitute a very large percentage of overall capacity (up to 80% of all data is written once and never accessed again), many customers will save money by diversifying their drives.
Dell Storage SC4020 all-in-one array - Traditional HDD arrays

Traditional HDD arrays

The SC4020 can also be deployed as a traditional array with hard drives only. For those who don’t need the performance of flash, data progression still provides best-in-class tiering to optimize performance and enhance your HDD solution. Features such as FastTrack disk optimization ensure you get the most out of your hard drive investment.


SC4020 drive options

SC4020 supports a wide variety of 2.5” SSDs and HDDs, including:

WI (Write-Intensive) SSDs RI (Read-Intensive) SSDs HDDs
 300GB SAS, 15K
600GB SAS, 10K
900GB SAS, 10K
1.2TB SAS, 10K
1TB SAS, 7.2K

Additional 3.5” drives are supported in optional expansion enclosures: 2TB 7.2K, 3TB 7.2K, 4TB 7.2K, 6TB 7.2K, 450GB 15K, 600GB 15K.
Dell Storage SC4020 all-in-one array - Other configuration options

Other configuration options

SC4020 is available with either Fibre Channel or iSCSI networking ports. Native block SAN support is included, plus NAS support when deployed with the optional FS8600 NAS appliance. Additionally, replications and snapshots can be controlled and automated with the Enterprise Manager tool.

Dell Storage SC Series expansion enclosures

In addition to its 24 internal drive slots, SC4020 supports non-disruptive expansion to 192 total drives (over 500TB raw capacity) per array, with even larger capacities available in federated multi-array configurations. Flash and/or HDD tiers are supported to meet specific performance, cost or density needs using any combination of the following expansion enclosures.

Dell Storage SC200

Dell Storage SC200

  • (12) 3.5" drive slots
  • 2U rack size
  • 72TB max capacity per enclosure
  • 6Gb SAS (dual modules) controller-enclosure connection
  • Supports intermixed drives
  • SSDs: 200GB/400GB/1.6TB/1.92TB
  • HDDs: 2TB/3TB/4TB/6TB 7.2K
  • Compatible with SC9000, SC8000 and SC4020 controllers
Dell Storage SC220 Dell Storage SC220
  • (24) 2.5" drive slots
  • 2U rack size
  • 92.16TB max capacity per enclosure
  • 6Gb SAS (dual modules) controller-enclosure connection
  • Supports intermixed drives
  • SSDs: 200GB/400GB/480GB/800GB/960GB/1.6TB/1.92TB/ 3.84TB
  • HDDs: 300GB/600GB 15K, 900GB/1.2TB/1.8TB 10K and 1TB 7.2K
  • Compatible with SC9000, SC8000 and SC4020 controllers
Dell Storage SC280

Dell Storage SC280

  • (42 or 84) 3.5" drive slots
  • 5U rack size
  • 504TB max capacity per enclosure
  • 6Gb SAS (dual modules) controller-enclosure connection
  • Supports HDDs: 4TB/6TB 7.2K
  • Compatible with SC9000, SC8000 and SC4020 controllers


Dell Compellent SC4020 - A new level of Storage Center efficiency

A new level of Storage Center efficiency

The latest Dell Storage Center OS builds on the SC Series legacy while delivering even better performance, efficiency and scalability. Features include:

  • Seamless disaster recovery and zero workload downtime with Live Volume auto-failover
  • Multi-array federation capability
  • Application Protection Manager Suite offering enhanced data integrity for Oracle, Microsoft and VMware environments
  • Data-at-rest encryption on the same array with industry-standard key management
  • Multi-VLAN tagging for efficient data and security separation between network traffic
  • LDAP support for easy access and maintenance
  • Advanced capacity options with SC4020 support for up to 192 drives and the SC280 ultra-dense enclosure
  • Space and cost savings with auto-tiering and "thin methods" (provisioning, snapshots, clones and more)
Dell Compellent SC4020 - Data Progression: Automated tiered storage

Data Progression: Automated tiered storage

Based on actual use and application performance requirements, SC Series Data Progression automatically optimizes your drive tiers and RAID levels. By default, all new data is written to fastest Tier 1 drives at RAID 10 performance levels, then converted to economical RAID 5/6 for subsequent reads.

As data ages, it is moved to less expensive storage until it becomes active again. All-flash and hybrid arrays can leverage the unique attributes of write- and read-intensive SSDs in combination. Data is precisely where it’s needed, when it’s needed – the perfect combination of high IOPS and cost savings.

Space savings in the data center

The SC Series offers Dynamic Capacity (thin provisioning) that completely separates storage allocation from utilization, enabling you to allocate any size storage volume up front while only consuming physical capacity on write. For data protection or "thin replication," Data Instant Replays solve tradeoff issues between snapshot granularity and capacity cost savings. Remote Instant Replay leverages the same space-efficient snapshots to deliver a cost-effective disaster recovery solution between local and remote sites.

Additionally, intelligent block-level compression – with up to 93% capacity savings* – is available on HDD and SSD arrays that fully integrate with Data Progression auto-tiering for maximum cost savings and minimum performance impact.
Dell Compellent SC4020 - Business continuity

Business continuity

For seamless disaster recovery, easy storage migrations or the creation of federated multi-array systems, the Storage Center Live Volume feature acts as a "storage hypervisor," allowing data to be copied or moved between arrays with no interruption to host access. New auto-failover capability gives you full auto-restore and volume-level protection from unplanned outages with no need for additional hardware or software.

To help avoid physical security breaches, many organizations and government agencies are focusing on data-at-rest encryption. The SC Series offers a complete range of FIPS 140-2 certified self-encrypting drives (SEDs) in both SSD and HDD formats, plus support for leading third-party key managers.
Dell Compellent SC4020 - Intuitive management at your fingertips

Intuitive management at your fingertips

SC Series arrays include a unified, point-and-click interface that cuts administration time and eliminates the need for specialized skills. Repetitive, time-consuming tasks are automated so data center staff can focus on other important projects.

Enterprise Manager simplifies storage resource management by providing comprehensive monitoring and management of all local and remote Dell SC Series Storage Center systems. With advanced features like departmental "charge-back" reporting, you can gain instant visibility and control of a multi-terabyte, multilocation environment, streamlining administration and reducing operating costs. You can also easily migrate data from PS Series (EqualLogic) to SC Series.

Data center automation with leading technology partner integrations

SC Series features a vast array of integration points with VMware, Microsoft, Oracle, OpenStack, IBM, CommVault, Symantec, Foglight and more. VMware® vSphere® plug-in, vCenter™ SRM adapter and VAAI support help you manage storage and virtual machines together.

With the introduction of Application Protection Manager for Oracle, you can create application-consistent Replays for Oracle databases. Combined with Storage Center Data Instant Replay (DIR), it will ensure reliable application consistent backup and recovery of Oracle and Microsoft Volume Shadow Copy (VSS) enabled applications (Exchange, SQL and Hyper-V®) and VMware virtual machines (VMs).
Dell Compellent SC4020 - Data center automation with leading technology partner integrations