We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Silver 3.5-inch SATA hard drive with circuit board visible

Seagate

Seagate SV35.5 ST31000525SV 1TB 7200 RPM 32MB SATA 3.0Gb/s internal hard drive

SKU CH-8H8Z-2RTW6 MPN ST31000525SV

A 1 TB 7200 RPM SATA 3.0Gb/s drive with 32 MB cache built for 24x7 video surveillance

  • Total capacity1 TB
  • Interface typeSATA 3.0Gb/s
  • Packaging typeRetail
  • Rotational speed7,200 RPM
  • Cache memory32 MB
  • Key featuresEnterprise-class reliability for 24 × 7 video surveillance a
  • Engineered for 24x7 surveillance recording with enterprise-class reliability
  • 7200 RPM spindle speed and 32MB cache deliver responsive multi-stream performance
  • SATA 3.0Gb/s interface ensures broad desktop compatibility
  • 20mm form factor improves airflow in multi-drive enclosures
  • ATA-7 streaming commands optimise read/write profiles for smooth video capture

Engineered for 24x7 Surveillance

The Seagate SV35.5 ST31000525SV is a 1TB internal hard drive built for continuous video recording. It operates at 7200 RPM with a 32MB cache over a SATA 3.0Gb/s interface. Enterprise-class reliability targets greater than one million hours MTBF and an annualised failure rate below one percent for demanding surveillance workloads.

Thermals, Noise and Power

A 20-mm form factor allows increased airflow between drives in multi-bay enclosures. Higher areal density contributes to lower power consumption during sustained write operations. The drive is optimised for cool, quiet performance in always-on surveillance systems where multiple units run side by side.

ATA-7 Streaming Commands

Firmware-level ATA-7 streaming commands tailor read and write profiles specifically for video streams or mixed video and data workloads. This ensures smooth, reliable footage capture while maintaining database integrity for indexing. The feature directly supports multi-stream recording without the need for host-side tuning.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $108.99
Typical for this category: the median of 4,938 items is $107.99.
Total capacity 1 TB
Lower than about 60% of the 2,372 comparable items (median 2 TB).
Price per TB $108.99 per TB
Pricier than about 65% of the 2,365 comparable items (median $62.21 per TB).

New to this? Paying with USDT: TRC-20 or ERC-20 — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameSeagate
Product lineSV35.5
Model nameST31000525SV
Total capacity1 TB
Performance
Rotational speed7,200 RPM
Storage
Cache memory32 MB
Ports & slots
Interface typeSATA 3.0Gb/s
Size & build
Shipping weight0.61 kg
Package size152 × 102 × 25 mm

Questions about this item

How is the 3.5-inch SATA drive installed, and what step is often missed?

Mount the drive in a 3.5-inch bay, connect the SATA data cable to the motherboard and the SATA power cable from the PSU, then enable the SATA port in BIOS so the OS can detect the 1TB volume.

What maintenance or replacement will the SV35.5 need during 24x7 surveillance use?

No scheduled maintenance is required; the drive is rated for continuous operation with a 1 million hour MTBF, so replacement is only needed if SMART attributes report reallocated sectors or the unit fails.

What limit appears first when the ST31000525SV writes multiple video streams continuously?

The 3.0Gb/s SATA interface and 32MB cache set the sustained throughput ceiling, so heavy multi-stream recording will hit the interface bandwidth before the 7200 RPM platters become the bottleneck.

More in 3.5-Inch Internal Desktop HDDs

Similar items