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Silver 3.5 inch internal hard drive with exposed circuit board

DELL

DELL ST20000NM004D 20TB 7200RPM SAS 3.5in accessory

SKU CH-59JZ-BE01W MPN ST20000NM004D

20 TB 3.5-inch internal SAS hard drive spinning at 7200 RPM with 12 Gbps interface

  • 20 TB capacity stores massive datasets
  • 7200 RPM spindle delivers high throughput
  • SAS 12 Gbps interface enables fast transfers
  • 512e format balances compatibility and efficiency
  • 5 inch form factor fits standard bays

Enterprise SAS Hard Drive

The Dell ST20000NM004D is a 20 TB internal hard drive built for enterprise storage arrays and servers. It uses a SAS interface running at 12 Gbps and spins at 7200 RPM with a 512e sector format. The 3.5 inch form factor fits standard drive bays in rackmount systems.

Suited for Bulk Data Workloads

This drive suits administrators who need high-capacity, sequential throughput for backup targets, archival tiers or nearline analytics. It is not for desktop PCs or workstations lacking a SAS host bus adapter, nor for workloads demanding low-latency random IOPS where flash media is required.

Capacity and Headroom

Twenty terabytes provide ample room for large datasets, media libraries or long-term retention policies. The 7200 RPM spindle delivers consistent sequential bandwidth for streaming writes, while the 512e format ensures compatibility with legacy controllers. Random write performance and latency will saturate well before the capacity limit in transactional database roles.

How it compares

Measured against everything we stock in Cable Locks & Laptop Extras, at today’s prices. Recalculated every night.

Price $1,112.99
Pricier than about 91% of the 8,808 comparable items (median $16.99).

Specifications

No published specifications for this item yet.

Questions about this item

Which SAS controller or backplane supports the 12 Gbps link speed of this ST20000NM004D drive?

A SAS 12 Gbps controller or backplane with a compatible 3.5-inch drive bay is required to run the drive at its full interface speed.

Will this 7200 RPM SAS drive work in an enclosure that currently holds 6 Gbps SAS drives?

Yes, the drive is backward compatible with 6 Gbps SAS infrastructure, though it will operate at the slower link rate.

How can I verify the drive reports 20 TB capacity and 512e formatting after installation?

Check the operating system disk utility or RAID controller BIOS; it should show approximately 20 TB usable space and a 512e sector size.

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