QNAP TVS-472XT 4-Bay NAS Enclosure - Manual (Page 54)

8. Click Next.
9. Select one or more disks.
Warning
All data on the selected disks will be deleted.
10. Click Next.
11. Optional: Configure 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 QTS has created the RAID group.
Tip
To determine the optimal amount of over-provisioning for your SSDs, download and run SSD
Profiling Tool from App Center.
12. Click Next.
13. Click Expand.
A confirmation message appears.
14. Click OK.
15. Optional: For a RAID 50 or RAID 60 volume, repeat these steps for each sub-group.
QTS starts rebuilding the RAID group. The storage capacity of the volume increases after RAID rebuilding is
finished.
Expanding a Single Static Volume By Adding a New RAID Group
The storage capacity of a static volume can be expanded by creating a new RAID group and then adding it to
the volume. This operation can be performed while the volume is online and accessible to users. QTS writes
data linearly to storage pools containing multiple RAID groups. This means that QTS writes data to a RAID
group until the group is full before writing data to the next RAID group.
Warning
• If a static volume contains multiple RAID groups and one RAID group fails, all data on
the volume will be lost. Ensure that you have a complete data backup plan.
• To expand a RAID 50 or RAID 60 pool, you must create a new RAID 50 or 60 group with
the same number of disks and sub-groups as the original pool. It is not possible to add
additional sub-groups.
1. Go to Storage & Snapshots > Storage > Storage/Snapshots .
2. Select a static volume.
3. Click Manage.
The Volume Management window opens.
4. Click Expand.
The Expanding Static Volume Wizard window opens.
5. Select Create and add a new RAID group.
6. Click Next.
QTS 4.4.x User Guide
Storage & Snapshots 53