PowerEdge：由于长时间关机，SSD 或 NVMe 驱动器会发生数据保留
Summary: 包含企业级 SSD 或 NVMe 设备且关机时间超过 3 个月的系统可能会因设备内的数据保留限制而出现错误或驱动器故障。
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Symptoms
企业级 SSD 和 NVMe 驱动器使用代表存储数据的电压级别，将数据保留在其 NAND 结构中。这使驱动器具有许多有益的功能，例如高读写速度和低延迟。但是，它还要求只要需要存储数据，就必须保持这些电压。作为其“数据保留”功能集的一部分，驱动器固件执行后台任务以保持数据一致性。
Cause
通电的SSD和NVMe设备执行数据保留任务，以刷新NAND单元内的静态电压。此外，NAND 损耗均衡经过优化，无论驱动器处于空闲状态还是正在进行主机 I/O作，都会执行。
相比之下，长时间关闭电源的驱动器无法执行这些数据保留作。在某些情况下，驱动器可能容易在保留的数据内降低NAND单元电压，这可能导致恢复作时出现介质或驱动器故障。
相比之下，长时间关闭电源的驱动器无法执行这些数据保留作。在某些情况下，驱动器可能容易在保留的数据内降低NAND单元电压，这可能导致恢复作时出现介质或驱动器故障。
Resolution
JEDEC SSD标准JESD218和JESD219提供了有关SSD介质数据保留的行业范围的要求。
该标准要求 SSD/NVMe 驱动器在断电期间将其数据以最大额定耐用性水平（即在写入耐用性方面处于完全消耗状态）保留至少三个月。
应该注意的是，数据保留受到以下因素的负面影响：
该标准要求 SSD/NVMe 驱动器在断电期间将其数据以最大额定耐用性水平（即在写入耐用性方面处于完全消耗状态）保留至少三个月。
应该注意的是，数据保留受到以下因素的负面影响：
- 驱动器的 P/E 周期和 TBW 状态（剩余耐用性）
- 与具有较少 P/E 周期或 TBW 的新驱动器相比，具有较多 P/E 周期或 TBW 的驱动器具有较少的保留能力。
- 驱动器生命周期内的活动温度
- 在驱动器的整个生命周期内，NAND单元的温度会影响保留能力。
- 断电事件持续时间内的断电温度
- 处于断电状态的驱动器应存放在不超过 40°C/104°F 的环境温度下。
Affected Products
Dell PowerEdge Express Flash NVMe PCIe SSD, PowerEdge FC640, PowerEdge M640, PowerEdge M640 (for PE VRTX), PowerEdge M7701, PowerEdge M7725, PowerEdge MX5016s, PowerEdge MX740C, PowerEdge MX750c, PowerEdge MX760c, PowerEdge MX840C, PowerEdge R240
, PowerEdge R250, PowerEdge R260, PowerEdge R340, PowerEdge R350, PowerEdge R360, PowerEdge R440, PowerEdge R450, PowerEdge R470, PowerEdge R540, PowerEdge R550, PowerEdge R570, PowerEdge R640, PowerEdge R6415, PowerEdge R650, PowerEdge R650xs, PowerEdge R6515, PowerEdge R6525, PowerEdge R660, PowerEdge R660xs, PowerEdge R6615, PowerEdge R6625, PowerEdge R670, PowerEdge R6715, PowerEdge R6725, PowerEdge R740, PowerEdge R740XD, PowerEdge R740XD2, PowerEdge R7415, PowerEdge R7425, PowerEdge R750, PowerEdge R750XA, PowerEdge R750xs, PowerEdge R7515, PowerEdge R7525, PowerEdge R760, PowerEdge R760XA, PowerEdge R760xd2, PowerEdge R760xs, PowerEdge R7615, PowerEdge R7625, PowerEdge R770, PowerEdge R770AP, PowerEdge R7715, PowerEdge R7725, PowerEdge R7725xd, PowerEdge R840, PowerEdge R860, PowerEdge R940, PowerEdge R940xa, PowerEdge R960, PowerEdge T140, PowerEdge T150, PowerEdge T160, PowerEdge T340, PowerEdge T350, PowerEdge T360, PowerEdge T40, PowerEdge T440, PowerEdge T550, PowerEdge T560, PowerEdge T640
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Article Properties
Article Number: 000198930
Article Type: Solution
Last Modified: 02 Sep 2025
Version: 2
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