Seagate

Seagate Constellation ES.2 3TB SAS

ST33000650SS
ConstellationnearlineCMR3TBSAS-6G3.5"
$17.00/TB
$51.00
REFURBIn Stock
Price updated
Price accurate as of Sep 2, 2026, 05:31 PM
Buy on Amazon →

The Seagate Constellation ES.2 3TB SAS is a 3TB SAS-6G HDD in used condition. It is in stock at $51.00 - $17.00/TB.

Before you buy: this is a SAS drive

SAS drives do not plug into a normal SATA motherboard port. You need a SAS host bus adapter or a backplane that speaks SAS - an LSI/Broadcom HBA in IT mode is the usual answer. A SATA drive will run on a SAS controller, but not the other way round. HBA and IT-mode guide

This is a refurbished or recertified listing

Recertified enterprise drives are pulled from datacentre fleets, tested and resold. They are usually the cheapest route to bulk capacity, and the risk is concentrated in the first weeks - so check SMART data the day it arrives rather than the day you need it. What recertified means · Refurbished warranty terms · Verify on arrival

Same capacity, other options
DriveInterfaceCond$/TBPrice
HGST HUS724030ALS640 3TB SAS 6GSAS-6GRefurb$15.13$45.39Buy
Seagate Constellation ES.2 3TB SAS EnterpriseSAS-6GRefurb$16.00$48.00Buy
HGST Ultrastar HUS723030ALS640 3TB SAS 6GSAS-6GRefurb$17.00$51.00Buy
Seagate 3TB Enterprise Capacity SAS 6GSAS-6GRefurb$17.98$53.95Buy

All 3TB drives we track, ranked by cost per terabyte.

Model context

Part of the Seagate line we track.

Quick Verdict

The Seagate Constellation ES.2 3TB SAS is a 3TB SAS-6G enterprise drive at $17.00/TB - CMR recording makes it safe for all RAID levels and NAS deployments. As a refurbished unit, run SMART diagnostics on arrival and verify power-on hours.

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Specifications

Capacity3TB
Form Factor3.5"
InterfaceSAS-6G
Recording TechCMR
RPM7200
Cache
Sector Size512n
Workload Rating550TB/yr
Warranty
ASINB07H8N4XBT
Market context

Against every other drive we have an in-stock price for today, this one is cheaper per tb than 98% of them (238 of 244). The cheapest we can currently buy is $14.99/TB; the middle of the market is $36.15/TB.

Where the wider market has moved

These are third-party figures about the retail market as a whole, quoted and dated. They are not our own measurements and they do not describe this specific drive.

Compare against every 3TB drive we track →Cheapest per terabyte, all categories →Category price trends →
How it compares - 3TB SAS-6G
#1HGST HUS724030ALS640 3TB SAS 6G
$15.13/TB
#2Seagate Constellation ES.2 3TB SAS Enterprise
$16.00/TB
#3Seagate Constellation ES.2 3TB SASTHIS DRIVE
$17.00/TB
#4HGST Ultrastar HUS723030ALS640 3TB SAS 6G
$17.00/TB
#5Seagate 3TB Enterprise Capacity SAS 6G
$17.98/TB

Frequently Asked Questions

Yes. The Constellation ES.2 3TB SAS uses CMR recording which is fully compatible with all RAID levels. It is rated for 550TB/year workload.

Warranty varies by seller. Check the Amazon listing for current warranty terms.

Compatible with any server or workstation equipped with a SAS HBA or SAS backplane. Tested with Dell PowerEdge, HPE ProLiant, Supermicro and IBM System x platforms.

Use Case Scenarios

🏠
Home & SMB NAS
Building a mid-range NAS for media, backups and file sharing.
~ Good fit
CMR recording is RAID-safe and fully compatible with Synology, QNAP, TrueNAS and UnRAID. Refurb units offer strong value for non-critical NAS.
💾
Backup Server / Veeam Target
Dedicated backup storage for Veeam, Commvault, or NetBackup.
✓ Excellent fit
3TB SAS drives are ideal for backup targets. Dual-port SAS suits dual-path backup infrastructure.
🏗️
Virtualization Host Storage
VM images and snapshots on Proxmox, VMware or Hyper-V.
~ Good fit
Suitable for VM storage where workloads are not IOPS-intensive. SAS dual-port suits HA cluster shared storage. Consider NVMe cache for latency-sensitive VMs.

Maintenance & Troubleshooting

Maintenance Checklist

On installCheck SMART baseline on arrival
Run smartctl -a /dev/sdX and record: Reallocated_Sector_Ct, Power_On_Hours, Spin_Retry_Count. Critical for refurb drives — refuse any with reallocated sectors > 0.
MonthlyRun SMART short self-test
smartctl -t short /dev/sdX — takes 1-2 minutes, catches most developing issues. Schedule during off-peak.
QuarterlyRun SMART long self-test
smartctl -t long /dev/sdX — full surface scan, takes 2 hours for 3TB. Any test failure is grounds for immediate replacement.
QuarterlyCheck RAID array health
Verify no degraded drives. A degraded array with no hot spare is one failure from data loss. Check mdstat or controller UI.
AnnuallyVerify drive firmware version
Check Seagate support site for firmware updates. Some versions have known bugs affecting integrity.
Every 3-5 yearsPlan proactive replacement
Enterprise HDDs have higher failure rates after year 4-5. At 3TB per drive, budget for replacements before failures occur.

Troubleshooting Guide

Cause: HBA not initialized, SAS expander issue, cable fault, or incompatible controller.
Fix: Verify HBA firmware. Check SAS topology with sas2ircu or StorCLI. Test with known-good cable. Confirm drive is SAS not SATA.