Kioxia CM7-R (PCIe Gen 5 Enterprise NVMe・2024年)（キオクシアシーエム7アール）

概要

Kioxia CM7-R は、2024年Kioxia Holdings Corporation (元東芝Memory・2017年東芝 Memory分社化 (Toshiba Memory Corporation) → 2018年Bain Capital + Apple + Dell EMC + Hoya Corporation Consortium $18B買収 → 2019年Kioxia rename → 2024年Tokyo Stock Exchange IPO完了 + 2024年 World NAND最大手3社・累計売上$8B+/year・NAND Industry pioneer (1987年Fujio Masuoka東芝研究員 NAND Flash Memory invention・東芝1987年Original NAND inventor heritage・World NAND original creator) ) が発表したEnterprise NVMe SSD・PCIe Gen 5 x4 + 14,000 MB/s Sequential Read / 6,750 MB/s Sequential Write + 2.7M IOPS Random Read + 3D BiCS FLASH 8th-generation (218-layer TLC NAND・Kioxia独自BiCS technology・World-first 3D NAND 2007年Kioxia発明 + 8th-gen 2024年Production grade) + 1.6TB-30.72TB capacity options + U.2 (2.5" 15mm) + EDSFF (E1.S / E3.S) form factor + Read-intensive 1 DWPD specific workload optimized (Mixed-use 3 DWPD は CM7-V Variant separate) ・$0.15-$0.20/GB Hyperscale tier ・Micron 9550 (Hyperscale Top-tier) / Solidigm D7-PS1010 / Samsung PM1745 / Western Digital Ultrastar DC SN655 等の Enterprise NVMe Big-5 vendor (Micron / Solidigm / Samsung / Kioxia / Western Digital) 競合のRead-intensive workload特化 Hyperscaler / Cloud Service Provider / Database Read-heavy向け Enterprise NVMe・元東芝Memory + 1987年NAND original inventor heritage の Japan NAND Heritage brand。

主な特徴・仕組み

• Interface: PCIe Gen 5 x4 (32 GT/s lane × 4 = 128 GT/s total bidirectional)
• NAND: BiCS FLASH 8th-generation (218-layer TLC・Kioxia独自BiCS technology・World-first 3D NAND 2007年 invention)
• Sequential Read: 14,000 MB/s
• Sequential Write: 6,750 MB/s
• Random Read: 2,700,000 IOPS (2.7M IOPS)
• Random Write: 600,000 IOPS
• Capacity Options: 1.6TB / 3.84TB / 7.68TB / 15.36TB / 30.72TB
• Endurance: 1 DWPD (Read-intensive workload optimized・CM7-V Variant 3 DWPD Mixed-use)
• Form Factor: U.2 (2.5" 15mm) + E1.S (EDSFF) + E3.S (EDSFF Premium)
• Power: 12-20W TDP
• Encryption: AES-256 (FIPS 140-3 Level 2 + TCG OPAL 2.0)
• MTBF: 2,500,000 hours
• Workload: Read-intensive (Database read-heavy / Analytics / Video on Demand / Web servers)
• Price: $0.15-$0.20/GB (Hyperscale tier)

スペック比較表

具体例・対応製品

• Kioxia CM7-R 1.6TB / 3.84TB / 7.68TB / 15.36TB / 30.72TB: 5 capacity options
• Kioxia CM7-V (Variant・Mixed-use 3 DWPD): 同spec + 3 DWPD endurance・Mixed workload向け
• Kioxia FL Series (Optane代替・SLC): $1.0+/GB・Top-tier endurance (60 DWPD)・Storage Class Memory位置
• Kioxia BG6 (Mainstream Client): $0.06-$0.08/GB・PCIe Gen 4 + Consumer向け Cost-down
• 競合 Samsung PM1745: $0.15-$0.20/GB・Samsung V8 236-layer + Samsung NAND heritage

自作PCでの選び方・注意点

Kioxia CM7-R は「Read-intensive Database (PostgreSQL / MySQL / MongoDB read-heavy workload)」「Web servers / Analytics / Video on Demand (Static content delivery)」「Hyperscaler Read tier (Cold tier / Capacity tierではなく Read tier specific)」用途のEnterprise NVMe Read-specialized SSD。Consumer / 自作PC範囲外・Server / Storage Array deployment専用・Read-intensive 1 DWPD (Mixed-use 3 DWPD CM7-V variant differentiation) で Customer workload type specific selection重要 (Read-heavy = CM7-R / Mixed = CM7-V)・Kioxia BiCS FLASH 8th-generation (218-layer・Kioxia独自NAND technology・World-first 3D NAND 2007年 invention Japan NAND heritage) + Read-intensive performance optimization ($0.15-$0.20/GB) で Read-heavy workload Cost-Performance Sweet spot。Micron 9550 (Hyperscale Top-tier $0.15-$0.20/GB・Higher write performance + Higher IOPS) と比較で Read-only workload では Kioxia CM7-R十分 + Mixed-use では Micron 9550 / Kioxia CM7-V優位。Form factor multi-support (U.2 + E1.S + E3.S) で Customer Server configuration flexibility・Kioxia Japan NAND Heritage brand preference + 1987年NAND original inventor lineage value判断あり。

関連用語との違い

• vs Micron 9550: KioxiaはRead-intensive specialized + 218-layer + $0.15-$0.20/GB・Micron 9550はMixed-use + 232-layer + Higher IOPS
• vs Samsung PM1745: KioxiaはBiCS FLASH technology + Read-intensive・SamsungはV8 NAND + General-purpose Mixed-use
• vs Kioxia CM7-V (Mixed-use Variant): CM7-RはRead-intensive 1 DWPD・CM7-VはMixed-use 3 DWPD same NAND base + workload positioning differentiation

よくある質問（FAQ）

Q1: Read-intensive 1 DWPD と Mixed-use 3 DWPD どちらを選ぶ？ A: Read-only workload (Web servers / Static content delivery / Read-heavy database analytics) → CM7-R 1 DWPD・Mixed-use workload (Database OLTP / Active write-heavy applications) → CM7-V 3 DWPD・Customer workload analysis (Read:Write ratio) で判断・Read 90%+ ratio → R variant / Read 70-90% ratio → V variant。

Q2: Kioxia BiCS FLASH 8th-generation 218-layer の意義？ A: Kioxia独自3D NAND technology・World-first 3D NAND 2007年Kioxia (旧東芝) inventor heritage + 2024年8th-generation 218-layer (Samsung V8 236-layer / Micron 232-layer / SK Hynix 238-layer等のNAND Big-Three race中位tier)・1987年Fujio Masuoka東芝研究員 NAND Original invention・Japan NAND industry pioneer legacy。

Q3: Kioxia IPO 2024年達成後の影響は？ A: 2017年東芝Memory分社化 → 2018年Bain Capital買収 → 2019年Kioxia rename → 2024年Q4 Tokyo Stock Exchange IPO完了 + Public company transition・Long-term capital availability + Brand transparency + Customer Long-term Strategic relationship可能性向上 + Bain Capital exit準備済 status。

まとめ

Kioxia CM7-R = 2024年Kioxia発表のRead-intensive Enterprise NVMe PCIe Gen 5 SSD。BiCS FLASH 8th-generation 218-layer + 14,000 MB/s Read + 2.7M IOPS + Read-intensive 1 DWPD + $0.15-$0.20/GB・元東芝Memory + 1987年NAND original inventor heritage + Read-heavy workload特化のHyperscaler / Cloud Service Provider Enterprise NVMe。