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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 DWPD, 7.68結核, but here is the difference: の 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.

技術仕様

パラメータ	仕様
容量	7.68結核 (また: 1.92結核, 3.84結核, 15.36結核, 30.72結核)
フォームファクタ	2.5-inch U.3 (15んん, backward-compatible with U.2)
インタフェース	PCIe 4.0 x4, NVMe 1.4
NAND型	Micron 176-layer 3D TLC (Replacement Gate, RG architecture)
Controller	Micron in-house enterprise controller with DRAM cache
シーケンシャルリード (128K)	まで 6,800 MB/s
シーケンシャルライト (128K)	まで 5,600 MB/s
ランダム読み取り (4K, QD256)	Up to 1,000K IOPS
ランダム書き込み (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
持久力	1 DWPD (5 年), 14,016 TBW (7.68TB model)
MTBF	2,000,000 時間
SLC Cache	Dynamic (not fixed) — writes bypass SLC cache when it fills, maintaining sustained write rate
力 (アイドル状態 / Avg Read / Avg Write / マックス)	5W / 12W / 16W / 20W
停電保護	Capacitor-backed, full write cache protection
End-to-End Data Protection	T10 DIF/DIX, PI (Protection Information) pass-through
安全	TCG オパール 2.0, SED, FIPS 140-2 (SKU に依存), secure erase (instant, crypto-erase)
Physical	100.45 バツ 69.85 バツ 15.00 んん, ~140g
温度	0°C〜70°C
保証	5-年限定 (メーカー)

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	480K IOPS	~350K IOPS
Write latency (QD1)	15 microseconds	~22 microseconds
NAND layer count	176-層 (RG architecture, newer)	128-層 (V-NAND V6)
最大容量	30.72結核 (industry’s highest U.3)	15.36結核
Best for	Write-heavy, sustained throughput, データベース	Mixed read-write, general enterprise

互換性のあるプラットフォーム

U.3 form factor, backward-compatible with all U.2 NVMe backplanes. Compatible with Dell PowerEdge R660, R760, R770, R7715, R860, R960, xFusion フュージョンサーバー V7, レノボ ThinkSystem V3/V4. Works with PERC H755N, H965i, or direct PCIe passthrough via tri-mode controllers.