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A Conversation Over Coffee Between a DBA and an Infrastructure Architect

DBA: «Our SQL Server data volume is running at 85% IOPS capacity on the current Gen3 NVMe drives. If we do not upgrade before Q4, the holiday traffic will tip us over.»

Infrastructure Architect: «We have two options. Option A: Samsung PM9A3 7.68TB at 1,000K read IOPS. Option B: Kioxia CM7 at 2,700K read IOPS on Gen5. Both are overkill for your actual workload — you are running at 420K peak IOPS on a 24-drive array. You need higher IOPS per drive, not higher peak throughput.»

DBA: «So what is Option C?»

Infrastructure Architect: «Micron 7450 PRO. 1,000K read IOPS, 1 ДВПД, 7.68ТБ, but here is the difference: а 7450 uses 176-layer NAND with Micron’s in-house controller. The sustained write performance after the SLC cache is exhausted is 50% higher than the PM9A3 because the controller does not rely on a large SLC buffer to hit its spec sheet numbers. Your workload is 70% writes, sustained, all day. You need write consistency, not peak read IOPS.»

They ordered the 7450 PRO. The Q4 holiday traffic came and went without a single storage-related incident ticket.

Технические характеристики

Параметр	Спецификация
Емкость	7.68ТБ (also: 1.92ТБ, 3.84ТБ, 15.36ТБ, 30.72ТБ)
Фактор формы	2.5-inch U.3 (15мм, backward-compatible with U.2)
Интерфейс	PCIe 4.0 х4, NVMe 1.4
Тип NAND	Micron 176-layer 3D TLC (Replacement Gate, RG architecture)
Контроллер	Micron in-house enterprise controller with DRAM cache
Последовательное чтение (128K)	Вплоть до 6,800 МБ/с
Последовательная запись (128K)	Вплоть до 5,600 МБ/с
Случайное чтение (4K, QD256)	Up to 1,000K IOPS
Случайная запись (4K, QD256)	Up to 410K IOPS
70/30 Mixed Random (4K, QD256)	Up to 480K IOPS
Latency (4K Random Read, QD1)	~75 microseconds
Latency (4K Random Write, QD1)	~15 microseconds
Выносливость	1 ДВПД (5 годы), 14,016 TBW (7.68TB model)
Среднее время безотказной работы	2,000,000 часы
SLC Cache	Dynamic (not fixed) — writes bypass SLC cache when it fills, maintaining sustained write rate
Власть (Idle / Avg Read / Avg Write / Макс)	5Вт / 12Вт / 16Вт / 20Вт
Защита от потери мощности	Capacitor-backed, full write cache protection
End-to-End Data Protection	T10 DIF/DIX, PI (Protection Information) pass-through
Безопасность	TCG Opal 2.0, СЭД, ФИПС 140-2 (SKU-dependent), secure erase (instant, crypto-erase)
Physical	100.45 Икс 69.85 Икс 15.00 мм, ~140g
Температура	0от °С до 70 °С
Гарантия	5-year limited (manufacturer)

Micron 7450 PRO vs Samsung PM9A3 — The Write Consistency Difference

Scenario	Micron 7450 PRO	Samsung PM9A3
Sustained sequential write (after SLC cache exhaustion)	~2,400 MB/s (high consistency, dynamic SLC)	~1,600 MB/s (lower after static SLC fills)
70/30 mixed IOPS	480тыс. операций ввода-вывода в секунду	~350K IOPS
Write latency (QD1)	15 microseconds	~22 microseconds
NAND layer count	176-layer (RG architecture, newer)	128-layer (V-NAND V6)
Максимальная емкость	30.72ТБ (industry’s highest U.3)	15.36ТБ
Best for	Write-heavy, sustained throughput, база данных	Mixed read-write, general enterprise

Compatible Platforms

U.3 form factor, backward-compatible with all U.2 NVMe backplanes. Compatible with Dell PowerEdge R660, 760 рэндов, 770 рэндов, R7715, 860 рэндов, 960 рэндов, xFusion FusionServer V7, Lenovo ThinkSystem V3/V4. Works with PERC H755N, H965i, or direct PCIe passthrough via tri-mode controllers.