Applicable Products
- QNAP NAS models that support RAID 1 (for example, 2-bay models such as TS-251)
Scenario
- The NAS currently uses two 3.5-inch HDDs configured as a RAID 1 array.
- One HDD has failed. The user wants to know whether the failed HDD can be replaced with an SSD.
Explanation
RAID 1 mirrors data between two drives. The usable capacity of the RAID 1 group is determined by the smallest member drive. To successfully rebuild the RAID 1 array, the replacement drive must provide at least the same usable capacity as the existing member.
In many QNAP NAS models, it is technically possible to mix an HDD and an SSD in the same RAID 1 group, as long as the drive is supported and meets capacity requirements. However, overall performance and behavior are still constrained by the RAID configuration and system design, and the array will not perform like an all-SSD RAID.
Solution
You can usually replace a failed HDD with an SSD in a RAID 1 QNAP NAS if the SSD is supported for your NAS model and has equal or larger usable capacity than the original drive. A smaller-capacity drive is not recommended because the RAID 1 array may not be able to rebuild.
Step-by-step procedure
- Confirm your current RAID type, original drive capacity, and NAS model in QTS (for example, in Storage > Storage/Snapshots).
- Select a replacement SSD that:
- is listed as compatible with your NAS model on the QNAP Compatibility List, and
- has equal or larger capacity than the failed HDD.
- Follow the QTS instructions to replace the failed disk and start the RAID 1 rebuild.
- Monitor the RAID rebuild status until it completes and the RAID group status changes to Healthy.
- After the rebuild finishes, run a disk and volume health check and confirm that read/write operations complete normally.
Validation
- RAID 1 status is Healthy in QTS.
- No critical disk, storage pool, or volume warnings are displayed.
- File read/write operations complete without errors.
Risk reminder
RAID rebuild operations always carry some risk, especially if the remaining drive is old or has marginal health. Disk model, firmware, and age can affect rebuild reliability. Before replacing drives or rebuilding RAID, ensure that you have a verified backup of critical data.
Further Reading
适用产品
- QNAP NAS models that support RAID 1 (for example, 2-bay models such as TS-251)
场景
- 当前 NAS 使用两个 3.5 英寸 HDD 配置为 RAID 1 阵列。
- 一个 HDD 已经故障。用户想知道是否可以用 SSD 替换故障的 HDD。
说明
RAID 1 在两个驱动器之间镜像数据。RAID 1 组的可用容量由较小的成员驱动器决定。要成功重建 RAID 1 阵列，替换驱动器必须提供至少与现有成员相同的可用容量。
在许多 QNAP NAS 型号中，技术上可以在同一个 RAID 1 组中混合使用 HDD 和 SSD，只要驱动器受支持并满足容量要求。然而，整体性能和行为仍受 RAID 配置和系统设计的限制，阵列不会像全 SSD RAID 那样表现。
解决方案
如果 SSD 支持您的 NAS 型号并且具有与原始驱动器相同或更大的可用容量，通常可以在 RAID 1 QNAP NAS 中用 SSD 替换故障的 HDD。不推荐使用容量较小的驱动器，因为 RAID 1 阵列可能无法重建。
分步程序
- 在 QTS 中确认您当前的 RAID 类型、原始驱动器容量和 NAS 型号（例如，在存储 > 存储 / 快照中）。
- 选择一个替换的 SSD，该 SSD：
- 在 QNAP 兼容性列表上列为与您的 NAS 型号兼容，并且
- 具有与故障 HDD 相同或更大的容量。
- 按照 QTS 指示替换故障磁盘并开始 RAID 1 重建。
- 监控 RAID 重建状态直到完成，并且 RAID 组状态变为健康。
- 重建完成后，运行磁盘和卷健康检查，并确认读 / 写操作正常完成。
验证
- RAID 1 状态在 QTS 中为健康。
- 没有显示关键磁盘、存储池或卷警告。
- 文件读 / 写操作无错误完成。
风险提醒
RAID 重建操作总是存在一定风险，特别是如果剩余驱动器较旧或健康状况不佳。磁盘型号、固件和使用年限可能影响重建可靠性。在更换驱动器或重建 RAID 之前，请确保您有经过验证的关键数据备份。
进一步阅读
