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A silver 3.5 inch SAS hard drive with a flat metal top and exposed circuit board underneath

HGST

HGST HUH721212AL5204Product Ultrastar DC HC520 12 TB 3.5" SAS internal hard drive

SKU CH-79T3-H2304 MPN HUH721212AL5204Product

A 12 TB 3.5-inch internal hard drive with a 7200 rpm spindle speed, 256 MB buffer and 12Gb/s SAS interface for storage systems

  • NAND Flash Memory TypeHard Drive
  • 12 TB capacity for massive data storage
  • 7200 rpm spindle speed for quick data access
  • 256 MB buffer to boost throughput
  • 12Gb/s SAS interface for fast host connectivity
  • 5 inch form factor fits standard drive bays

Enterprise storage drive

The HGST Ultrastar DC HC520 is a 12 TB 3.5" internal hard drive built for data centre and storage-system workloads. It uses a 12Gb/s SAS interface, spins at 7200 rpm and provides a 256 MB buffer for sustained throughput. The 512e disk format ensures compatibility with modern operating systems and RAID controllers. This new drive is designed for continuous operation in rack-mounted arrays.

Suits high-capacity arrays.

This drive fits storage-system deployments that need maximum terabytes per bay and the dual-port reliability of SAS. It is not intended for laptop upgrades, external enclosures or single-drive desktop boot configurations where a smaller form factor or lower power draw would be preferable. Buyers who need a 2.5" form factor or a different interface should consider other options.

12Gb/s SAS interface decides compatibility

The drive requires a backplane, HBA or RAID controller that supports 12Gb/s SAS to operate at its rated interface speed. Systems with only 6Gb/s SAS ports will still function but at the lower link rate. Verify that your server or storage chassis accepts a 3.5" 1" high drive and provides adequate cooling for 7200 rpm operation before purchase.

Highlights

  • 12 TB capacity for massive data storage
  • 7200 rpm spindle speed for quick data access
  • 256 MB buffer to boost throughput
  • 12Gb/s SAS interface for fast host connectivity
  • 5 inch form factor fits standard drive bays

Specifications

BrandHGST
NAND Flash Memory TypeHard Drive

Questions about this item

Will the 12Gb/s SAS interface work with my existing 6Gb/s SAS backplane?

The drive uses a 12Gb/s SAS interface which is backwards compatible with 6Gb/s SAS controllers and backplanes, operating at the lower speed when connected to older hardware.

How can I verify the 7200 rpm spindle speed and 256 MB buffer are active after installation?

Check the drive identification data through your RAID controller BIOS or operating system utilities — they will report the 7200 rpm rotational speed and 256 MB cache size for model HUH721212AL5204.

Does the 3.5" 12 TB drive ship with mounting screws or a SAS cable, or must I buy them separately?

The drive is supplied as a bare 3.5" internal unit; mounting screws and SAS data cables are not included and must be sourced separately for your enclosure or server chassis.

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