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Five Myths About Enterprise NVMe SSDs — Busted
Myth #1: “NVMe SSDs burn out in a year under database workloads.” Reality: A modern enterprise NVMe drive rated at 1 DWPD writes its full capacity every single day for five years before hitting its endurance limit. The Samsung PM9A3 7.68TB at 1 DWPD means 7.68TB of writes per day, every day, for 1,825 days. If your database writes more than 7.68TB per day to a single drive, you have a logging problem, not a drive endurance problem.
Myth #2: “PCIe 4.0 is obsolete now that Gen5 is here.” Reality: PCIe 5.0 doubles per-lane bandwidth from 16 GT/s to 32 GT/s, but most enterprise workloads saturate neither. The PM9A3’s 6,800 MB/s sequential read speed is limited by the NAND controller, not the PCIe bus. A Gen5 drive with the same NAND would deliver the same throughput. Gen5 matters for drives pushing 12 GB/s+ — and those do not exist in volume at enterprise price points in 2026.
Myth #3: “You need 3 DWPD for database workloads.” Reality: Most OLTP databases write 0.2-0.5 DWPD. 3 DWPD drives are for write caching, OLTP logging, and journaling — not the data volume itself. Buying 3 DWPD for a 0.3 DWPD workload wastes 30-50% of the drive budget. The PM9A3’s 1 DWPD rating handles general-purpose databases, 仮想化, and mixed-use workloads comfortably.
Myth #4: “All 7.68TB SSDs are created equal.” Reality: The PM9A3 uses Samsung V-NAND V6 TLC with a purpose-built enterprise controller featuring end-to-end data protection, power-loss protection capacitors, and a DRAM cache (not DRAM-less). Budget enterprise drives often skip the DRAM cache and power-loss capacitors to hit a price point — the PM9A3 does not.
Myth #5: “U.2 is a dead form factor.” Reality: E3.S is the future, but U.2 is the present. Every current-generation server from Dell (R660, R760, R770), xFusion, and Lenovo supports U.2 NVMe natively. U.2 drives are backward-compatible with existing SAS/SATA backplanes (via tri-mode controllers), meaning you can deploy them in servers purchased today and migrate them to E3.S platforms when your next refresh cycle arrives.
技術仕様
| パラメータ | 仕様 |
|---|---|
| 容量 | 7.68結核 (also available: 1.92結核, 3.84結核, 15.36結核) |
| フォームファクタ | 2.5-inch U.2 (15んん) |
| インタフェース | PCIe 4.0 x4, NVMe 1.4 |
| NAND Type | Samsung V-NAND V6 TLC (トリプルレベルセル) |
| Controller | Samsung Elpis enterprise controller with DRAM cache |
| Sequential Read | まで 6,800 MB/s |
| Sequential Write | まで 4,000 MB/s |
| Random Read (4K, QD256) | Up to 1,000K IOPS |
| Random Write (4K, QD256) | Up to 180K IOPS |
| 持久力 | 1 DWPD (5 years), 14,016 TBW total |
| MTBF | 2,000,000 時間 |
| Uncorrectable Bit Error Rate | 1 sector per 10^17 bits read |
| 力 (Idle / Active Read / Active Write) | 2.5W / 10W / 14W |
| 停電保護 | Capacitor-backed, full data-at-rest and in-flight protection |
| End-to-End Data Protection | はい (T10 DIF/DIX support) |
| Hardware Encryption | AES 256-bit, TCG Opal 2.0, IEEE 1667 |
| Physical Dimensions | 100.20 バツ 69.85 バツ 15.00 んん, 140g |
| 動作温度 | 0°C〜70°C |
| 保証 | 5-year limited (manufacturer) |
Compatible Platforms
Compatible with all Dell PowerEdge servers with U.2 NVMe backplanes (R650, R660, R750, R760, R770, R7715, R860, R960), xFusion FusionServer V7 series, Lenovo ThinkSystem V3/V4, and any server with U.2 (SFF-8639) NVMe connectivity. Works with PERC H755N, H965i NVMe RAID, or direct PCIe passthrough via tri-mode controllers.
Supported Operating Systems
ヴイエムウェア ESXi 7.0 U3+, 8.0+ | Windowsサーバー 2019, 2022, 2025 | RHEL 8.6+, 9.バツ | SLES 15 SP4+ | Ubuntu 20.04 LTS, 22.04 LTS, 24.04 LTS. Standard NVMe driver (in-box) for all listed OSes — no vendor-specific driver installation required.
Who Should Look Elsewhere
If your workload writes more than 7.68TB/day sustained to a single drive, step up to a 3 DWPD model. If you need sub-50 microsecond latency for HFT or real-time systems, look at SCM (Storage Class Memory) or Optane alternatives. If you have an existing E3.S-only backplane (R470, R670), this U.2 drive requires a converter — budget for the adapter or choose an E3.S-native SSD.
Source Through Xincuan
Factory-direct pricing on the full PM9A3 capacity range. 3-年保証, global shipping, and free storage architecture consultation. Volume pricing available for 10+ ドライブ.
