QNAP

QTS 5.0.x

Storage Global Settings

Setting

Description

RAID Resync Priority

Specify the minimum speed of the following RAID operations:

  • Rebuild

  • Migration

  • Scrubbing

  • Sync

You can select one of the following priorities:

  • Service First: QTS performs RAID operations at lower speeds in order to maintain NAS storage performance.

  • Default: QTS performs RAID operations at the default speed.

  • Resync First: QTS performs RAID operations at higher speeds. Users may notice a decrease in NAS storage performance while RAID operations are in progress.

Important:

This setting only affects RAID operation speeds when the NAS is in use. When the NAS is idle, all RAID operations are performed at the highest possible speeds.

RAID Scrubbing Schedule

Enable this feature to periodically scan for and fix bad sectors on RAID 5 and RAID 6 groups.

Auto Reclaim and SSD Trim Schedule

Enable this feature to periodically run the following operations on all thin volumes and SSDs:

  • Auto Reclaim: QTS returns unused storage space to the parent storage pool when files are deleted from thin volumes.

  • SSD Trim: QTS tells the SSD firmware which data blocks it is safe to erase when performing garbage collection. This helps maintain the SSD's write performance and lifespan.

By default, the operations are scheduled to run daily at 2:00 AM. SSD Trim is only performed on solid state drives that belong to a RAID 0, RAID 1, or RAID 10 group.

Tip:

You should enable this feature if you have one or more of the following storage items:

  • Thin volumes

  • SSD RAID groups of type: Single, RAID 0, RAID 1, RAID 10

Note:

To reclaim space on a thin LUN, the reclaim must be run on the iSCSI client.

Scheduled File System Check

Enable this feature to scan and automatically fix all volumes that have file system errors at a later date.