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Black 2.5 inch SATA enterprise SSD with silver label

Black Diamond Memory

Black Diamond Memory BDSSDS256G 2.5" 256GB SATA enterprise SSD

SKU CH-CB4R-H29M2 MPN BDSSDS256G

2.5-inch SATA enterprise SSD with 256 GB capacity, up to 520 MB/s read and 470 MB/s write speeds, and a 2,000,000-hour MTBF

  • Total capacity256 GB
  • Sequential read speedUp to 520 MB/s
  • Sequential write speedUp to 470 MB/s
  • Interface typeSATA III
  • Form factor2.5 in (6.35 cm)
  • Controller chipMarvell 88SS9188

Capacity 256GB

  • Faster boot and app loading up to 4x over HDDs
  • Sequential read up to 520 MBps and write up to 470 MBps
  • 5" SATA III form factor fits standard drive bays
  • Marvell 88SS9188 controller with power-loss data protection
  • 2,000,000-hour MTBF for enterprise-grade reliability

Sonic Series enterprise SSD

The Black Diamond Memory BDSSDS256G is a 2.5 inch SATA III solid state drive built for server and storage arrays. Its 256 GB capacity and Marvell 88SS9188 controller suit administrators who need dependable read performance for boot volumes or mixed workloads.

7 mm z-height and standard SATA connectors

The drive measures 7.00 mm high, 69.86 mm wide and 100.50 mm deep, matching the common 2.5 inch bay. With no moving parts it runs silently, resists shock and reacts to sudden power loss to protect stored data from corruption.

SATA III 6 Gbps interface limits

Sequential reads reach up to 520 MBps and writes up to 470 MBps, which is the practical ceiling of the SATA bus. Buyers who need higher throughput or lower latency should consider drives that use a faster interface. MTBF is rated at 2,000,000 hours and the operating range spans 0 °C to 70 °C.

How it compares

Measured against everything we stock in Server & Data Center SSDs, at today’s prices. Recalculated every night.

Price $163.99
Cheaper than about 93% of the 1,039 comparable items (median $992.99).
Total capacity 256 GB
Lower than about 94% of the 522 comparable items (median 3.2 TB).
Sequential read speed Up to 520 MB/s
Lower than about 90% of the 311 comparable items (median 6,500 MB/s).
Price per TB $640.59 per TB
Pricier than about 55% of the 522 comparable items (median $595.64 per TB).

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Specifications

Product
Brand nameBlack Diamond Memory
Product lineSonic Series
Model nameBDSSDS256G
Total capacity256 GB
Performance
Sequential read speedUp to 520 MB/s
Sequential write speedUp to 470 MB/s
Storage
Controller chipMarvell 88SS9188
Ports & slots
Interface typeSATA III
Size & build
Form factor2.5 in (6.35 cm)
Overall height7 mm
Overall width69.86 mm
Product depth100.5 mm
Shipping weight0.14 kg
Package size100 × 70 × 7 mm
Environment & compliance
Operating temperature range0 °C to 70 °C
More details
Mean time between failures2,000,000 h

Other versions of this model

2 more in the same range

Questions about this item

What maximum sequential speeds does the SATA III interface allow on this drive?

The SATA III link caps practical throughput at 520 MBps read and 470 MBps write for this model.

Will the 7.00 mm height fit a standard 2.5 inch bay or caddy?

Yes, the 7.00 mm z-height matches the common 2.5 inch form factor used in most server and laptop bays.

How is the drive installed and what step is often missed?

Connect the SATA data and power cables, secure the 69.86 mm × 100.50 mm chassis with screws, then initialise the 256 GB volume in the OS — skipping initialisation leaves the drive invisible.

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