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.
適用產品
詳細資訊
QTS 使用系統保留空間來儲存配置資訊和與 NAS 上的磁碟區相關的元資料。在儲存空間管理器和儲存與快照總管中,此空間顯示為系統保留。此空間是 NAS 正常運作所需,並由三個不同的儲存空間類別組成:
類別 | 說明 | 大小 |
|---|
QNAP 儲存空間保留空間 | 包含儲存空間配置資料和 NAS 功能所需的額外空間 | 每個儲存空間池約 70 GB,每個靜態磁碟區約 20 GB。 |
QNAP RAID 保留空間 | 包含 RAID 元資料 | 每個 RAID 群組總容量的百分之一。每個群組最多 150 GB。 |
EXT4 檔案系統元資料空間 | 包含 EXT4 檔案系統的元資料 | 每個磁碟區的百分比。容量較大的磁碟區需要較少空間。對於大於 100 GB 的磁碟區,空間佔磁碟區的 0.8% 到 1.8%。 |
除了上述列出的類別外,系統保留空間還可能包括快照備份任務使用的空間。當快照備份任務將快照從來源 NAS 傳輸到目的地 NAS 時,系統會在目的地保留儲存空間池空間以供接收備份資料使用。此空間在儲存空間池使用情況分解中計入系統保留。
保留的空間對應於您的備份資料將佔用的實際儲存空間。一旦備份傳輸完成,此空間將完全由傳輸的資料使用。如果您從目的地 NAS 移除快照 Vault,相關的系統保留空間將被釋放。
因此,包含快照 Vault 的儲存空間池將顯示比不包含的儲存空間池更大的系統保留值。這是預期的行為,並不表示儲存空間錯誤。