Does the ST6000NE0023 have 512e or 4Kn sector size? How is this different than ST6000NE0021? Seagate lists the same specs for both, so what's different between the two model numbers?

The only difference I can see is as follows: The NE0021 has 2018 Kb/in max recording density, vs the NE0023 with 1894. Also, he NE0021 has 369 ktracks/in avg, vs the NE0023 with 370. Basically, the difference between the drives is a little different densities on the disks resulting in the same overall total capacity, As you say they both have 512 bytes per logical sector, and 4096 bytes per physical sector. Hope this helps.

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Seagate IronWolf Pro 6TB 3.5" SATA 7200rpm Internal Hard Drive ST6000NE0023

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Manufacturer: Seagate
Manufacturer Part Number: ST6000NE0023
UPC: 763649111321

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GeneralInformationManufacturer: Seagate TechnologyManufacturer
PartNumber: ST6000NE0023Manufacturer
WebsiteAddress:
http: //www. seagate.
comBrandName: SeagateProduct
Line: IronWolf
ProProductModel: ST6000NE0023Product
Name: IronWolf Pro ST6000NE0023 Hard DriveProduct Type: Hard
DriveTechnicalInformationStorageCapacity: 6
TBRecordingTechnology: Conventional Magnetic Recording (CMR) Drive PerformanceSpindle
Speed(rpm):
7200Buffer: 256
MBNetwork&CommunicationWirelessLAN: NoInterfaces/PortsDrive
Interface: SATA
DriveInterfaceStandard: SATA/600Physical
CharacteristicsDriveType: InternalForm
Factor: 3.5"H ot
Pluggable:
YesHeight:
1"Width:
4"Depth: 5.8"W
eight(Approximate): 1.55 lbMiscellaneousDevice
Supported: ServerStorage System

Model
Brand	Seagate
Series	IronWolf Pro
Model	ST6000NE0023
Packaging	Bare Drive

Performance
Interface	SATA 6.0Gb/s
Capacity	6TB
NAND Flash Memory Type	Hard Drive
RPM	7200 RPM
Cache	256MB
Average Latency	4.16ms

Features
Features	Optimized for NAS with AgileArray. AgileArray enables dual-plane balancing and RAID optimization in multi-bay environments, with the most advanced power management possible. Actively protect your NAS with IronWolf Health Management focusing on prevention, intervention, and recovery. High performance means no lag time or downtime for users during workload traffic for the NAS. Seagate leads the competition with the highest-performing NAS drive portfolio. Seagate Rescue Data Recovery. IronWolf Pro comes with extra peace of mind for any mechanical, accidental, or natural disaster. With a 90% success rate of in-house recovery, Seagate has your back with a 2-year included Rescue Data Recovery plan. Rotational Vibration (RV) sensors. First in its class of drives to include RV sensors to maintain high performance in multi-drive NAS enclosures. Range of capacities up to 16TB. More capacity options means more choices that will fit within the budget. Seagate provides a scalable solution for any NAS use-case scenario. Do more in multi-user environments. IronWolf provides a workload rate of 300TB/year. Multiple users can confidently upload and download data to the NAS server, knowing IronWolf can handle the workload, whether you are a creative professional or a small business. Designed for always on, always accessible 24x7 performance. Access data on your NAS any time, remotely or on site. 1.2M hours MTBF represents an improved total cost of ownership (TCO) over desktop drives with reduced maintenance costs.
Usage	Enterprise NAS Hard Drives

Dimensions
Form Factor	3.5"
Height (maximum)	26.11mm
Width (maximum)	101.85mm
Length (maximum)	146.99mm

Additional Information
First Listed on Newegg	August 06, 2025

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