QNAP QTS 4.5 Series User Manual

d. Select a RAID type.
For details, see RAID Types.
e. Optional: Select the disk that will be used as a hot spare for the high speed tier.
7. Optional: Create the capacity tier.
At least two different tiers are required in a Qtier storage pool.
a.
Click .
b. Optional: Select an expansion unit.
c. Select one or more SATA or NL-SAS HDDs.
d. Select a RAID type.
For details, see RAID Types.
e. Optional: Select the disk that will be used as a hot spare for the capacity tier.
8. Click Next.
9. 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.
10. Optional: Configure the alert threshold.
QTS issues a warning notification when the percentage of used pool space is equal to or above the
specified threshold.
11. Click Next.
12. Verify the storage pool information.
13. Click Create.
A confirmation message appears.
Warning
All data on the selected disks will be deleted.
14. Click OK.
QTS creates the Qtier storage pool and starts moving data between tiers. QTS starts automatically tiering
data after it has spent sufficient time analyzing data access patterns.
Enabling Qtier in an Existing Storage Pool
You can enable Qtier in an existing storage pool by adding different types of disk to the pool. For details on
hardware and software requirements, see Qtier Requirements.
1. Go to Storage & Snapshots > Storage > Storage/Snapshots .
2. Select Qtier > Upgrade with Qtier .
The Upgrade Pool to use Qtier Wizard window opens.
QTS 4.5.x User Guide
Storage & Snapshots 240

QNAP QTS 4.5 Series Specifications

General

Brand	QNAP
Model	QTS 4.5 Series
Category	Storage
Language	English