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Dell MD3420 Controller*2 4G 12GB/s HBA*2 Cable*2 24*Drive Bays Overview
Dell MD3420 Controller*2 4G 12GB/s HBA*2 Cable*2 24*Drive Bays is a high-performance SAN storage enclosure designed for enterprise data centers and SMB backup environments. This solution features 24 drive bays that support a variety of drive types including SATA HDD, SAS HDD, and SATA SSD, offering flexible options to meet diverse storage demands without any superfluous additions.
Equipped with dual controllers each provisioned with 4G memory and 12GB/s HBA capabilities, the system delivers robust connectivity and rapid data transfer speeds ideal for virtualization, media server applications, and large-scale backup use cases. Additional features such as redundant power supplies, active cooling, and expansion support further enhance reliability and scalability in demanding data environments.
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Dell MD3420 Controller*2 4G 12GB/s HBA*2 Cable*2 24*Drive Bays Specifications
- Product Type
- Storage System
- Storage Type
- SAN
- Form Factor
- Rackmount
- Bay Count
- 24-bay
- Supported Drive Types
- SATA HDD / SAS HDD / SATA SSD
- Hot-Swap Support
- Yes
- Max Supported Capacity
- N/A
- RAID Support
- RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10
- CPU Type
- N/A
- CPU Cores
- N/A
- Installed RAM
- 8 GB
- Max RAM Capacity
- N/A
- RAM Type
- N/A
- Network Ports
- Fibre Channel
- LAN Ports
- N/A
- USB Ports
- N/A
- Expansion Support
- Yes
- Cooling
- Active
- Power Supply
- Redundant
- Power Supply Wattage
- N/A
- Operating System
- N/A
- Snapshot Support
- No
- Cloud Sync Support
- No
- Virtualization Ready
- Yes
- iSCSI Support
- N/A
- Surveillance Support
- No
- Use Case
- SMB / Enterprise Data Center / Virtualization / Media Server
- Product Name
- Dell MD3420 Controller*2 4G 12GB/s HBA*2 Cable*2 24*Drive Bays
- Height
- N/A
- Width
- N/A
- Depth
- N/A
- Weight
- N/A
Dell MD3420 Controller*2 4G 12GB/s HBA*2 Cable*2 24*Drive Bays Use Case
Virtualized Data Center Acceleration with Dell MD3420 Storage Array
In a global enterprise VMware vSphere deployment, IT architects integrate Dell MD3420 with dual controllers, dual 4 G 12 Gb/s HBAs and redundant fiber cables to deliver 24 hot-swappable drive bays. This high-availability SAN solution drives 35% lower I/O latency, scales capacity by 4×, and sustains 99.99% uptime—enabling real-time VM provisioning and predictable performance SLAs.
Mission-Critical Database Consolidation on Dell MD3420 SAN
A financial services firm consolidates ten SQL Server instances onto a Dell MD3420 array equipped with dual active-active controllers, 4 G 12 Gb/s HBAs and dual fiber cables. With 24 drive bays in RAID 6, the organization achieves 40% faster transaction throughput, simplifies data protection workflows, and enforces sub-15-minute RPOs—ensuring regulatory compliance and uninterrupted trading operations.
Centralized Backup and Archive Solution Using Dell MD3420
A mid-sized legal practice deploys Dell MD3420 featuring redundant controllers, 4 G 12 Gb/s HBAs, dual cables and 24 high-capacity drives as a unified backup repository. This configuration consolidates nightly backups, delivers 12 Gb/s throughput for rapid data ingest, and offers scalable archive growth. Result: 50% reduction in backup windows, streamlined compliance auditing and cost-effective long-term retention.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| Dell MD3420 Controller*2 4G 12GB/s HBA*2 Cable*2 24*Drive Bays |  Dell MD3420 Controller*1 4G 12GB/s HBA*1 Cable*1 24*Drive Bays |  Dell MD3400 Controller*1 4G 12GB/s HBA*2 Cable*2 12*Drive Bays |  Dell MD3420 Dual 4G Cache Controller, No hdd, 24 SFF, SAS HD connector, 600W RPS |  Dell MD3400 Controller*2 4G 12GB/s HBA*4 Cable*4 12*Drive Bays | |
|---|---|---|---|---|---|
| Product Type | Storage System | Storage System | Storage System | Storage System | Storage System |
| Storage Type | SAN | SAN | DAS | SAN | SAN |
| Form Factor | Rackmount | Rackmount | Rackmount | Rackmount | Rackmount |
| Bay Count | 24-bay | 24-bay | 12-bay | 24-bay | 12-bay |
| Supported Drive Types | SATA HDD / SAS HDD / SATA SSD | SATA HDD / SAS HDD | SAS HDD | SAS HDD | SATA HDD / SAS HDD |
| Hot-Swap Support | Yes | Yes | Yes | Yes | Yes |
| Max Supported Capacity | N/A | N/A | N/A | 512 TB | N/A |
| RAID Support | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 10 / JBOD | RAID 0 / RAID 1 / RAID 5 / RAID 10 | RAID 0 / RAID 1 / RAID 5 / RAID 6 / RAID 10 |
| CPU Type | N/A | N/A | N/A | N/A | N/A |
| CPU Cores | N/A | N/A | N/A | N/A | N/A |
| Installed RAM | 8 GB | N/A | N/A | 4 GB | N/A |
| Max RAM Capacity | N/A | N/A | N/A | 4 GB | N/A |
| RAM Type | N/A | N/A | N/A | N/A | N/A |
| Network Ports | Fibre Channel | N/A | N/A | N/A | Fibre Channel |
| LAN Ports | N/A | N/A | N/A | N/A | N/A |
| USB Ports | N/A | N/A | N/A | N/A | N/A |
| Expansion Support | Yes | Yes | Yes | Yes | Yes |
| Cooling | Active | Active | Active | Active | Active |
| Power Supply | Redundant | Single | Single | Redundant | Redundant |
| Power Supply Wattage | N/A | N/A | N/A | N/A | N/A |
| Operating System | N/A | N/A | N/A | N/A | Custom OS |
| Snapshot Support | No | No | N/A | No | N/A |
| Cloud Sync Support | No | No | N/A | No | N/A |
| Virtualization Ready | Yes | No | Yes | Yes | Yes |
| iSCSI Support | N/A | No | Yes | Yes | No |
| Surveillance Support | No | No | No | No | N/A |
| Use Case | SMB / Enterprise Data Center / Virtualization / Media Server | Enterprise Data Center | SMB / Enterprise Data Center / Virtualization | Enterprise Data Center | SMB / Enterprise Data Center / Virtualization / Media Server |
| Product Name | Dell MD3420 Controller*2 4G 12GB/s HBA*2 Cable*2 24*Drive Bays | Dell MD3420 Controller*1 4G 12GB/s HBA*1 Cable*1 24*Drive Bays | Dell MD3400 Controller*1 4G 12GB/s HBA*2 Cable*2 12*Drive Bays | Dell MD3420 Dual 4G Cache Controller, No hdd, 24 SFF, SAS HD connector, 600W RPS | Dell MD3400 Controller*2 4G 12GB/s HBA*4 Cable*4 12*Drive Bays |
| Height | N/A | N/A | 3.44 inches | N/A | N/A |
| Width | N/A | N/A | 19 inches | N/A | N/A |
| Depth | N/A | N/A | 28 inches | N/A | N/A |
| Weight | N/A | N/A | 45 lbs | N/A | N/A |
Questions & Answers
What are the key specifications of the Dell MD3420 with dual controllers?
The Dell MD3420 features two 4G 12 Gb/s controllers, dual HBAs, dual cables and 24 drive bays for high availability and performance.
How many drives can the MD3420 enclosure support?
The MD3420 supports up to 24x 2.5" or 3.5" SAS/SATA drives, enabling capacities up to 432 TB.
What RAID levels are supported by the MD3420 controller?
The MD3420 supports RAID 0, 1, 5, 6, 10, 50 and 60, providing flexible protection and performance options.
Which operating systems are compatible with Dell MD3420?
The MD3420 is certified for Windows Server, Red Hat, SUSE, VMware ESXi, and other major Linux distributions.
How does the dual-controller architecture benefit my storage environment?
Dual controllers deliver active-active failover, continuous data access, and load balancing to minimize downtime.
What management tools are included with the MD3420?
Dell’s Modular Disk Storage Manager (MDSM) provides intuitive configuration, monitoring and alerting for your array.
How do I install the MD3420 in a standard rack?
Slide the MD3420 into a 2U rack space, secure the rails, connect power and SAS cables to the host, then power on.
What connectivity options are available on the MD3420?
Each controller offers 4 Gb/s SAS host ports and 12 Gb/s SAS expansion ports for seamless integration and scaling.
Can I expand capacity beyond the 24 drives?
Yes, you can cascade up to four MD3420 enclosures behind a single host server for up to 96 drives.
What power supplies are used in the MD3420?
The MD3420 includes dual hot-swap 1100 W or optional 750 W redundant power supplies for high reliability.
How energy-efficient is the MD3420?
Advanced power management features, such as drive spin-down and variable speed fans, reduce energy consumption.
What warranty and support options are available?
Standard warranty is 3 years ProSupport with next-business-day on-site service; upgrades to 4-hour response are available.
Is the MD3420 suitable for virtualization environments?
Yes, with high IOPS and flexible RAID, it’s optimized for VMware, Hyper-V and other virtual workloads.
How do I monitor the health of my MD3420 array?
Use Dell OpenManage IT or MDSM for real-time alerts, health dashboards and predictive analytics.
What cable types are included with the MD3420?
The system ships with two 4G 12 Gb/s active SAS cables for reliable, high-speed connectivity.