Samsung MZ-7KM1T9N 1.92TB SM863a SATA 6Gb/s 2.5 inch Enterprise Solid State Drive

General

Brand	Samsung
Model	SM863a
Capacity	1.92TB
Usage Class	Enterprise

Interface

Host Interface	SATA 6Gb/s
Total Interface Bandwidth	6 Gb/s

Physical Dimension

Form Factor	2.5

Flash & Endurance

NAND Flash	Samsung V-NAND 2bit MLC
Drive Writes Per Day	3.6
Total Bytes Written	12320 TBW

Performance

Sequential Read	520 MB/s
Sequential Write	485 MB/s
Random Read IOPS	95000
Random Write IOPS	28000
Average Latency	100 μs

Reliability

Mean Time Between Failures	2 Million Hours
Uncorrectable Bit Error Rate	1.0×10⁻¹⁷
Power Loss Protection	Yes

Part Number

MPN	MZ-7KM1T90

Engineer's Note

The Samsung SM863a 1.92TB (MZ-7KM1T9N) is a strong step up from the earlier MZ-7KM1T90, pairing Samsung V-NAND 2-bit MLC with 3.6 DWPD and 12,320 TBW to deliver materially stronger write endurance and longer service life for read-intensive to mixed enterprise workloads. With 520/485 MB/s throughput and up to 95,000/28,000 IOPS over SATA 6Gb/s, it offers a higher-endurance, lower-risk replacement value than typical SATA peers for virtualization, OLTP, and cache-tier deployments where predictable latency and sustained write durability matter.

Endurance & Reliability

With an endurance rating of 12,320 TBW and 3.6 DWPD, the MZ-7KM1T9N is designed for sustained enterprise write workloads and can support writing its full usable capacity multiple times per day across its service life. In typical real-world use, this level of endurance is far beyond the needs of an OS or boot drive and provides long-term confidence even in write-intensive server and storage applications. For enterprise reliability, built-in power loss protection (PLP) helps preserve in-flight data and critical metadata during an unexpected power interruption, reducing the risk of corruption and unplanned recovery events. Its ultra-low UBER of 1.0E-17, together with a 2 million hour MTBF, reflects a highly dependable platform engineered for data integrity and stable operation in business-critical environments.

Technical Specs & Insights

1. The SATA interface pairs with near bus-saturating sequential throughput to accelerate OS boot, database backup, and large log or media ingest in legacy enterprise platforms without requiring a PCIe upgrade.
2. Strong random-read performance helps virtualized workloads and read-heavy databases return small blocks quickly, improving VM density and reducing application stalls during peak access.
3. The endurance rating supports multiple full-drive rewrites every day, making it well suited for write-intensive caching, transaction logging, and mixed-workload enterprise servers.
4. Samsung V-NAND 2-bit MLC provides a reliability-first flash foundation with more predictable sustained performance and stronger write resilience than TLC-based alternatives in mission-critical deployments.
5. Ultra-low typical latency enables faster response to transactional I/O, helping OLTP systems, metadata services, and latency-sensitive applications maintain tighter service levels.

Capacity Sweet

Lower capacity reference: 960GB Higher capacity reference: 3.84TB At 1.92TB, this SSD sits in the sweet spot of the family. Compared with the 960GB model, it gives much better headroom for OS images, application stacks, logs, and moderate data growth without changing the familiar enterprise SATA performance profile. Compared with the 3.84TB version, it usually delivers the best balance of acquisition cost, usable capacity, and predictable latency for mainstream deployments. In practice, it is well suited for mid-sized virtualization clusters, such as hosting boot and application volumes for about 60 to 80 general-purpose virtual machines.

FAQ