WD Ultrastar DC HA340 4TB Enterprise Data Center Internal Hard Drive 0B47076 3.5-inch SATA 6Gb/s 7200 RPM
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Western Digital
0B47076
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WD Ultrastar DC HA340 4TB Data Center Hard Drive
4TBSATA 6 Gb/s7200 RPM550 TB/yearMTBF 2M hours
The WD Ultrastar DC HA340 4TB (part number 0B47076, model WUS721204BLE6L4) is a 3.5-inch data center hard drive spinning at 7200 RPM with a 256 MB cache over SATA 6 Gb/s. Western Digital rates it at 2,000,000 hours MTBF with an annualised failure rate of 0.44 percent and a workload of up to 550 TB per year. The HA340 is Western Digital's air-filled data center platform, which is what the HA rather than HC in the name denotes.
Before you buy: this is a bare 3.5-inch internal drive supplied without rails, screws or cables. It uses a standard SATA 6 Gb/s connector, so it works in any SATA port or backplane, unlike the SAS models in the Ultrastar range. Decoding the model number: E6 means 512e SATA 6 Gb/s, the L in the power-disable position means this part uses the legacy Pin 3 configuration without Power Disable support, and the final 4 means Base SE, no encryption, Sanitize Overwrite only. It is a data center drive designed for a rack with forced airflow, so expect it to run warmer and louder than a desktop disk.
Best For
✓ Servers and data center racks
Rated for continuous enterprise duty at 550 TB per year, with a 2,000,000 hour MTBF.
✓ Standard SATA backplanes
Drops into any SATA port or backplane with no controller change, unlike the SAS models in the range.
✓ RAID arrays and JBOD
Enterprise error recovery timing and vibration handling keep the drive from dropping out of an array during a retry.
✓ Older servers without Power Disable
The L in the model code means legacy Pin 3, so it works in backplanes that would leave a PWDIS drive powered off.
Key Features
550 TB per year workload
Sized for the read and write volume of a busy production array, roughly ten times a consumer desktop drive.
2,000,000 hour MTBF and 0.44 percent AFR
The enterprise reliability figures Western Digital publishes for this platform.
Up to 255 MiB/s sustained
The maximum sustained transfer rate, quoted by Western Digital as up to 267 MB/s on the product page.
Air-filled platform
The HA340 family is air-filled rather than helium-sealed, which is what distinguishes HA from the helium HC models.
No Power Disable on this part
The L in WUS721204BLE6L4 marks the legacy Pin 3 configuration. Useful in older backplanes; check yours if it expects PWDIS.
512e sector format
Standard enterprise formatting. 512e models can be reformatted to 4Kn if your stack requires it.
Technical Specifications
| Drive | |
| Brand | Western Digital |
| Series | Ultrastar DC HA340 |
| Part Number (MPN) | 0B47076 |
| Ultrastar Model | WUS721204BLE6L4 |
| Form Factor | 3.5-inch internal |
| Capacity | 4TB |
| Interface | SATA 6 Gb/s |
| Rotational Speed | 7200 RPM |
| Average Latency | 4.16 ms |
| Cache | 256 MB |
| Recording Technology | CMR (conventional magnetic recording) |
| Sector Format | 512e, reformattable to 4Kn |
| Fill Gas | Air-filled. The HA in the family name denotes air; the HC families are helium-sealed. |
| Performance and Endurance | |
| Sustained Transfer Rate | Up to 255 MiB/s, quoted as up to 267 MB/s on the Western Digital product page |
| Random Read / Write | 154 read and 425 write IOPS per the Western Digital product page |
| Workload Rating | Up to 550 TB per year |
| MTBF | 2,000,000 hours (projected) |
| Annualised Failure Rate | 0.44 percent |
| Load / Unload Cycles | 600,000 at 40 degrees Celsius |
| Non-recoverable Read Errors | 1 in 10^15 bits read |
| Power and Acoustics | |
| Power (Operating) | Approximately 7.0 W |
| Power (Idle) | Approximately 5.8 W |
| Acoustics (Idle) | 2.9 Bels |
| Acoustics (Operating) | 3.6 Bels |
| Security and Configuration | |
| Security Model | Base SE. No encryption; Sanitize Overwrite only. |
| Power Disable (PWDIS) | Not supported on this part number. The L in the model code marks the legacy Pin 3 configuration. |
| Physical and Warranty | |
| Dimensions | 147.0 x 101.6 x 26.1 mm |
| Weight | 715 g (1.58 lb), plus or minus 10 percent |
| Operating Temperature | 5 to 60 degrees Celsius |
| Manufacturer Warranty | 5-year limited warranty from Western Digital |
| Warranty | 1-Year Warranty (Singular) |
| Product Identifiers | |
| MPN | 0B47076 |
| Ultrastar Model Number | WUS721204BLE6L4 |
| EAN / GTIN | 0829686008908 |
Frequently Asked Questions
Will the 0B47076 work in a normal desktop PC?
Yes. It is a standard SATA 6 Gb/s drive and any SATA port will detect it. Bear in mind that a data center drive is louder and warmer than a desktop disk and expects chassis airflow, so it is not the right choice for a silent build.
What does WUS721204BLE6L4 mean?
Reading the code: 72 is 7200 RPM, 04 is 4TB, B is the platform generation, L is the 26.1 mm height, E6 is 512e SATA 6 Gb/s, the second L means the legacy Pin 3 configuration without Power Disable support, and the final 4 means Base SE with no encryption. The sibling capacities 6TB, 8TB, 10TB and 12TB use the same BLE6L4 pattern.
Does it support hardware encryption?
No. This part number is the Base SE configuration, which offers Sanitize Overwrite only. Western Digital offers SED and, on SAS models, SED-FIPS variants under separate part numbers.
What do I need to know before buying the 0B47076?
It ships bare with no rails, screws or cables, it does not support Power Disable so check your backplane, and it is an air-filled data center drive that runs warmer and louder than a desktop disk. Remember that RAID is not a backup.
Singular Expert Insight
The HA340 is Western Digital's air-filled data center platform, sitting below the helium HC families in capacity but sharing their reliability ratings: 550 TB per year, 2,000,000 hour MTBF and a five-year manufacturer term. At 4TB that makes it a sensible choice for system, log or boot volumes in a rack, where you want enterprise error recovery and vibration handling without paying for helium capacity you do not need. The one configuration detail worth checking is Power Disable: the L in this model code means the drive uses legacy Pin 3, which is what you want in older backplanes but is worth confirming against newer ones. Browse our enterprise and server hard drives or, where latency matters more than capacity, our enterprise and server SSDs.
Buyer's Guide
Buy this if
You are populating a server or rack with SATA bays and want an enterprise reliability rating and workload figure at 4TB.
Skip if
You want a quiet drive for a home NAS or desktop, or your backplane requires Power Disable support. WD Red Plus fits the first case.
Also consider
WD Gold for the SATA retail equivalent, a larger Ultrastar if you need capacity per rack unit, or an enterprise SSD if latency matters more.
Features - Western Digital - 0B47076
Form Factor
- 3.5"
Interface
- SATA
More Details
Product Code
04:533723
EAN Code
0829686008908
Manufacturer
Western Digital
Technical specifications
Capacity
4TB