849H4 - Dell 849H4 12TB 3.5in Nearline SAS 7.2K

Name: Dell 849H4 12TB 3.5in Nearline SAS 7.2K
Brand: Dell
SKU: 849H4
Price: 808 USD
Availability: InStock

849H4 - Dell 849H4 12TB 3.5in Nearline SAS 7.2K | US IT Hardware

Product overview

The Dell 849H4 is an enterprise-class nearline SAS hard drive designed for high-capacity storage deployments in Dell MD1400 and PowerVault ME4 storage arrays. This 12TB drive features a 3.5-inch form factor, 7.2K RPM spindle speed, and 12Gbps SAS interface, delivering balanced performance and capacity for data center environments. The drive includes a hot-swap tray for seamless replacement without system downtime. With 512e sector format, it provides compatibility with modern storage systems while maintaining backward compatibility. Ideal for backup, archival, and general-purpose enterprise storage requiring high reliability and availability. MTBF rating of 1.2 million hours ensures long operational life in 24/7 data center deployments.

12TB capacity in 3.5-inch form factor.
12Gbps SAS interface for high-speed data transfer.
7.2K RPM spindle speed balances performance and power.
Hot-swap tray enables drive replacement without downtime.
512e sector format supports modern storage systems.
1.2M hour MTBF rating ensures enterprise reliability.

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Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Compatible Systems
Manufacturer part #	849H4
Brand	Dell
Condition	New
SKU	849H4
MTBF	1.2 million hours
Brand	Dell
Hot-Swap	Yes, includes Dell hot-swap tray
Product Type	Enterprise Nearline SAS Hard Drive with Hot-Swap Tray
Sector Format	512e (512-byte emulation)
Spindle Speed	7.2K RPM
Drive Category	Nearline (NL-SAS)

Compatible systems

The Dell 849H4 is qualified exclusively for Dell MD1400/MD1420 and PowerVault ME4 series storage arrays. It integrates seamlessly with these systems' SAS controllers, power infrastructure, and management software. No additional hardware or drivers required beyond the storage array itself.

Dell MD1400
Model: MD1400 / MD1420
Form factor: 3.5-inch SAS
Generation: MD14xx Series
Qualified drive per Dell support matrix. Supports up to 12TB capacity in MD1400/MD1420 enclosures.
Dell PowerVault ME4
Model: ME4024 / ME4084
Form factor: 3.5-inch SAS
Generation: ME4 Series
Qualified drive per Dell PowerVault ME4 support matrix. Compatible with both ME4024 and ME4084 configurations.

Best for

Data Center Storage
Primary storage expansion for Dell MD1400 and PowerVault ME4 arrays in enterprise data centers requiring high-capacity nearline drives.
Enterprise Backup
Backup and recovery systems in large organizations needing reliable, high-capacity storage with hot-swap capability for continuous availability.
Archival Systems
Long-term data archival and compliance storage where capacity and reliability are prioritized over performance.

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7200 RPM SAS Hard Drives Enterprise SAS Hard Drives Dell Hard Drives 3.5-inch (LFF) Server Hard Drives

Qualified for MD1400	Yes

Underlying Drive Model	WD WUH722012CL5200

Qualified for PowerVault ME4	Yes

Capacity	12TB

Interface Speed	12Gbps
Random IOPS (100% Read)	115 IOPS
Sequential Read Throughput	205 MB/s
Sequential Write Throughput	200 MB/s
Random IOPS (70% Read/30% Write)	120 IOPS

GB per Watt	643.4 GB/W (at max capacity)
Max Power Consumption	18.64 watts

TB per U	48TB per rack unit (in 2U enclosure with 4 drives)
Form Factor	3.5-inch
Enclosure Support	2 drives per enclosure (standard SAS array configuration)

Interface	SAS (Serial Attached SCSI)

Frequently asked questions

What is the capacity and interface speed of the Dell 849H4?

The Dell 849H4 provides 12TB of storage capacity with a 12Gbps SAS interface. This nearline drive operates at 7.2K RPM and delivers approximately 205 MB/s sequential read throughput, making it suitable for high-capacity storage arrays where sustained performance is required alongside large capacity.

Which Dell storage systems support the 849H4 drive?

The 849H4 is qualified for Dell MD1400 and PowerVault ME4 series storage arrays. It appears in Dell's official support matrices for these systems, confirming compatibility with both the MD1420 and ME4024/ME4084 configurations. Verify your specific array model in Dell's support documentation before purchasing.

What are the physical dimensions and weight of this drive with tray?

The 849H4 uses a standard 3.5-inch form factor. The hot-swap tray adds minimal weight and dimensions. Exact tray specifications vary by Dell array model. Consult your storage array's technical manual for precise carrier dimensions and weight specifications for rack planning.

How does the 849H4 compare to higher-speed SAS drives?

The 849H4 is a nearline drive optimized for capacity and power efficiency rather than maximum IOPS. At 7.2K RPM with 12Gbps SAS, it delivers approximately 120 random IOPS (70% read/30% write), compared to 15K RPM mission-critical drives offering 295+ IOPS. Choose 849H4 for sequential workloads and archival; choose 15K drives for transactional databases.

What is the MTBF and expected lifespan of the 849H4?

The Dell 849H4 has a rated MTBF of 1.2 million hours, translating to approximately 137 years of continuous operation in theory. In practice, enterprise drives typically see 5-7 year lifespans in 24/7 data center use. Dell's support lifecycle and warranty terms define actual replacement schedules for your environment.

Is the 849H4 compatible with non-Dell storage systems?

The 849H4 is a Dell-branded drive with Dell tray and firmware. While the underlying WD WUH722012CL5200 mechanism may work in other SAS arrays, Dell only qualifies and supports this SKU in MD1400 and PowerVault ME4 systems. Using it in non-Dell arrays voids support and may cause compatibility issues.

What power consumption should I expect from the 849H4?

Dell's HDD metrics document specifies nearline 3.5-inch 7.2K drives consume approximately 18.64 watts at maximum capacity. Actual power draw varies with workload; idle and read-only states consume less. Plan cooling and power infrastructure accordingly for large arrays with multiple 849H4 drives.

Dell 849H4 12TB 3.5in Nearline SAS 7.2K

Product overview

Featuring

Compatible systems

Best for

Details

Shipping, warranty & returns

Customer reviews

Storage

Network & Communication

Power Consumption

Physical Characteristics

Interface/Ports

Frequently asked questions

Dell 849H4 12TB 3.5in Nearline SAS 7.2K

Product overview

Featuring

Compatible systems

Best for

Details

Shipping, warranty & returns

Customer reviews

Shop these collections

Storage

Network & Communication

Power Consumption

Physical Characteristics

Interface/Ports

Frequently asked questions