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Silver 3.5 inch bare hard drive with IDE connector

Seagate

Seagate SV35.2 ST3250820AV 250GB 7200 RPM 8MB IDE 3.5" internal hard drive

SKU CH-Z1HC-VZGMP MPN ST3250820AV

250 GB 3.5" IDE hard drive with 7200 RPM and 8 MB cache, built for 24/7 surveillance recording

  • Total capacity250 GB
  • Interface typeIDE Ultra ATA100 / ATA-6
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory8 MB
  • Optimised for 24/7 video surveillance with 1,000,000+ hour MTBF
  • 250GB capacity stores multiple simultaneous camera streams
  • 7200 RPM spindle speed delivers 14ms write-seek performance
  • 8MB cache ensures smooth data transfers with minimal bottlenecking
  • IDE Ultra ATA100 interface provides up to 100 MB/s throughput

250 GB IDE surveillance drive

The Seagate SV35.2 ST3250820AV is a 250 GB 3.5 inch internal hard drive built for continuous video recording. Its 7200 RPM spindle speed and 8 MB cache support multiple simultaneous write streams in 24/7 surveillance systems. The bare-drive packaging suits installers replacing drives in existing DVR appliances.

IDE Ultra ATA100 throughput ceiling

The Ultra ATA100 interface caps burst transfer at 100 MB/s, which limits sustained write bandwidth compared with modern serial interfaces. Average latency sits at 4.16 ms and write seek time is 14 ms, so heavy multi-camera loads may saturate the bus before the platters become the bottleneck.

1,000,000 hour MTBF rating

The manufacturer targets a mean time between failures of 1,000,000 hours under constant high-write duty cycles. That endurance figure is the primary indicator of whether the drive matches a recorder’s reliability requirements.

How it compares

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

Price $98.99
Typical for this category: the median of 4,938 items is $107.99.
Total capacity 250 GB
Lower than about 90% of the 2,372 comparable items (median 2 TB).
Price per TB $395.96 per TB
Pricier than about 89% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineSV35.2
Model nameST3250820AV
Total capacity250 GB
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Cache memory8 MB
Ports & slots
Interface typeIDE Ultra ATA100 / ATA-6
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight1.36 kg
Package size203 × 152 × 51 mm

Questions about this item

Is the 250 GB capacity the only option in the SV35.2 line?

The SV35.2 series includes other capacities, but this model ST3250820AV is supplied as a single 250 GB drive.

What does the 7200 RPM spindle speed deliver in a DVR or NVR?

7200 RPM and a 14 ms write-seek time give fast, consistent throughput for recording multiple simultaneous video streams.

How fast can the Ultra ATA 100 / ATA-6 interface actually move data?

The interface is rated for up to 100 MB/s burst throughput, which caps real-world sustained transfer below that figure.

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