Applicable Products
Details
QTS uses System Reserved space to store configuration information and metadata related to volumes on your NAS. Within Storage Manager and Storage & Snapshots, this space is displayed as Sys. Reserved. This space is required for proper NAS operations and consists of three different storage categories:
Category | Description | Size |
|---|
QNAP storage reserved space | Contains storage configuration data and extra space required for NAS functionality | About 70 GB for each storage pool and 20 GB for each static volume. |
QNAP RAID reserved space | Contains RAID metadata | One percent of the total capacity of each RAID group. Maximum of 150 GB per group. |
EXT4 file system metadata space | Contains metadata for the EXT4 file system | A percentage of each volume. Higher capacity volumes require less space. For volumes larger than 100 GB, space is between 0.8% to 1.8% of the volume. |
In addition to the categories listed above, System Reserved space may also include space used by Snapshot Replica. When Snapshot Replica transfers snapshots from a source NAS to a destination NAS, the system secures storage pool space on the destination for the incoming backup data. This space is accounted for under System Reserved in the storage pool usage breakdown.
The secured space corresponds to the actual storage that your backup data will occupy. Once the backup transfer is complete, this space is fully used by the transferred data. If you remove a Snapshot Vault from the destination NAS, the associated System Reserved space will be released.
As a result, a storage pool that contains a Snapshot Vault will show a larger System Reserved value compared to a storage pool without one. This is expected behavior and does not indicate a storage error.
适用产品
详情
QTS 使用系统保留空间来存储与 NAS 上的卷相关的配置信息和元数据。在存储管理器和存储与快照总管中，此空间显示为系统保留。此空间是 NAS 正常运行所需的，由三种不同的存储类别组成：
类别 | 描述 | 大小 |
|---|
QNAP 存储保留空间 | 包含存储配置数据和 NAS 功能所需的额外空间 | 每个存储池约 70 GB，每个静态卷约 20 GB。 |
QNAP RAID 保留空间 | 包含 RAID 元数据 | 每个 RAID 组总容量的百分之一。每组较大 150 GB。 |
EXT4 文件系统元数据空间 | 包含 EXT4 文件系统的元数据 | 每个卷的百分比。容量较大的卷需要较少的空间。对于大于 100 GB 的卷，空间占比在 0.8% 到 1.8% 之间。 |
除了上述列出的类别外，系统保留空间还可能包括快照复制使用的空间。当快照复制将快照从源 NAS 传输到目标 NAS 时，系统会在目标上为传入的备份数据预留存储池空间。在存储池使用情况细分中，此空间计入系统保留。
预留的空间对应于备份数据将占用的实际存储。一旦备份传输完成，此空间将被传输的数据占用。如果您从目标 NAS 中移除快照 Vault，相关的系统保留空间将被释放。
因此，包含快照 Vault 的存储池将显示比不包含的存储池更大的系统保留值。这是预期的行为，并不表示存储错误。
