NAS State |
Action |
---|---|
No storage pools |
Click New Storage Pool. |
One or more storage pools |
Click Create, and then select New Storage Pool. |
The Create Storage Pool Wizard window opens.
You cannot select disks from multiple expansion units.
If the expansion unit is disconnected from the NAS, the storage pool becomes inaccessible until it is reconnected.
QuTS hero assigns the first storage pool created as the system pool. The system pool should consist of only SSDs.
If you select RAID 5, 6, TP, 10, 50, or 60 for the RAID type in the next step, you cannot select more than 16 disks.
For details, see The System Pool.
All data on the selected disks will be deleted.
QuTS hero displays all available RAID types and automatically selects the most optimized RAID type.
Use the default RAID type if you are unsure of which option to choose.
For details, see RAID Types.
The selected disks are divided evenly into the specified number of RAID 5 or 6 groups.
A higher number of subgroups results in faster RAID rebuilding, increased disk failure tolerance, and better performance if all the disks are SSDs.
A lower number of subgroups results in more storage capacity, and better performance if all the disks are HDDs.
If a RAID group is divided unevenly, the excess space becomes unavailable. For example, 10 disks divided into 3 subgroups of 3 disks, 3 disks, and 4 disks will provide only 9 disks of storage capacity.
QNAP SSD Antiwear Leveling (QSAL) is a patented QNAP technology that helps prevent SSDs in the same RAID group from failing at the same time. It works by adding a varying amount of over-provisioning to each SSD, which causes each disk to wear at a different rate.
QSAL is available for the following RAID types: RAID 5, 6, 50, 60, TP.
QSAL can only be enabled when creating a new pool and cannot be disabled later.
Setting |
Description |
---|---|
Optimize performance |
The system will optimize the pool's storage performance immediately after the pool is created. Important:
|
SSD over-provisioning |
Over-provisioning reserves a percentage of SSD storage space on each disk in the RAID group to improve write performance and extend the disk's lifespan. You can decrease the amount of space reserved for over-provisioning after QuTS hero has created the RAID group. Note:
SSD over-provisioning is automatically enabled if QNAP SSD Antiwear Leveling (QSAL) is enabled. |
External device SSD over-provisioning |
External device SSD over-provisioning reserves the specified percentage of space on each disk in the RAID group to improve write performance and extend the disk's lifespan. Note:
|
Pool over-provisioning |
Storage pool over-provisioning reserves the specified percentage of space in the storage pool in order to maintain consistent pool access performance. Storage pool over-provisioning also extends the lifespan of SSDs in the pool. |
Enable Pool Guaranteed Snapshot Space |
Reserve a percentage of the total storage pool space for snapshots. |
Alert Threshold |
QuTS hero issues a warning notification when the percentage of used pool space is equal to or above the specified threshold. |
A confirmation message appears.
QuTS hero creates the storage pool and then displays the information on the Storage/Snapshots screen.