Синьчуаньский сервер | Поставщик оборудования для корпоративных серверов
Five Myths About Enterprise NVMe SSDs — Busted
Миф #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, для 1,825 дни. If your database writes more than 7.68TB per day to a single drive, you have a logging problem, not a drive endurance problem.
Миф #2: «PCIe 4.0 is obsolete now that Gen5 is here.» Reality: PCIe 5.0 doubles per-lane bandwidth from 16 GT/s to 32 GT/s, but most enterprise workloads saturate neither.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.
Миф #3: «You need 3 DWPD for database workloads.» Reality: Most OLTP databases write 0.2-0.5 ДВПД. 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, виртуализация, and mixed-use workloads comfortably.
Миф #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.
Миф #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 (660 рэндов, 760 рэндов, 770 рэндов), 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.
Технические характеристики
| Параметр | Спецификация |
|---|---|
| Емкость | 7.68ТБ (also available: 1.92ТБ, 3.84ТБ, 15.36ТБ) |
| Фактор формы | 2.5-дюйм U.2 (15мм) |
| Интерфейс | PCIe 4.0 х4, NVMe 1.4 |
| Тип NAND | Samsung V-NAND V6 TLC (Трехуровневая ячейка) |
| Контроллер | Samsung Elpis enterprise controller with DRAM cache |
| Последовательное чтение | Вплоть до 6,800 МБ/с |
| Последовательная запись | Вплоть до 4,000 МБ/с |
| Случайное чтение (4K, QD256) | Up to 1,000K IOPS |
| Случайная запись (4K, QD256) | Up to 180K IOPS |
| Выносливость | 1 ДВПД (5 годы), 14,016 TBW total |
| Среднее время безотказной работы | 2,000,000 часы |
| Частота неисправимых битовых ошибок | 1 сектор на чтение 10^17 бит |
| Власть (Праздный / Active Read / Active Write) | 2.5Вт / 10Вт / 14Вт |
| Защита от потери мощности | Capacitor-backed, full data-at-rest and in-flight protection |
| Комплексная защита данных | Да (T10 DIF/DIX support) |
| Аппаратное шифрование | AES 256-bit, ТКГ Опал 2.0, IEEE 1667 |
| Физические размеры | 100.20 Икс 69.85 Икс 15.00 мм, 140г |
| Рабочая температура | 0от °С до 70 °С |
| Гарантия | 5-ограничено годом (производитель) |
Совместимые платформы
Compatible with all Dell PowerEdge servers with U.2 NVMe backplanes (650 рэндов, 660 рэндов, 750 рэндов, 760 рэндов, 770 рэндов, Р7715, 860 рэндов, 960 рэндов), xFusion FusionServer V7 series, Lenovo ThinkSystem V3/V4, and any server with U.2 (SFF-8639) NVMe connectivity. Работает с PERC H755N., H965i NVMe RAID, or direct PCIe passthrough via tri-mode controllers.
Supported Operating Systems
VMware ESXi 7.0 U3+, 8.0+ | Windows Server 2019, 2022, 2025 | РЕЛ 8.6+, 9.Икс | SLES 15 SP4+ | Убунту 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 (470 рэндов, 670 рэндов), this U.2 drive requires a converter — budget for the adapter or choose an E3.S-native SSD.
Источник через Синькуань
Factory-direct pricing on the full PM9A3 capacity range. 3-год гарантии, глобальная доставка, and free storage architecture consultation. Volume pricing available for 10+ диски.
