Important Notes

• For instructions on updating QES to the latest version, open the following link. https://preview.qnap.com/en/how-to/faq/article/my-nas-is-running-an-older-version-of-qes-can-i-update-to-the-latest-version-directly-what-sequence-should-i-follow-when-updating-qes
• For release note history, open the following link. https://www.qnap.com/en/releasenotes_qes/

Enhancements

• Modified the number of disks allowed in one RAID group when creating or expanding a storage pool, based on user feedback. New RAID group limits: RAID 0: Unlimited / RAID 1: 2 / RAID 5: 3–16 / RAID 6: 5–16 / RAID TP: 8–16 / Triple Mirror: 3 / RAID 10: 4–16 (creating), 2–16 (expanding) / RAID 50: 3–16 per subgroup / RAID 60: 5–16 per subgroup （Note: Increasing the number disks in a RAID group reduces its rebuild performance.）
• Improved the UI of the Expand Storage Pool screen.
• Optimized LUN creation. It is now possible to create a large number of LUNs at the same time.
• Improved the File Station Background Task screen to show task progress as a percentage during file move and copy operations.
• Optimized the RAID rebuilding process to prevent it failing if it encounters certain errors.
• Added timestamp and timezone information to syslog messages.
• To prevent deduplication from not functioning correctly, it is no longer possible to select a 4k block size when creating a shared folder or LUN in a legacy storage pool.

Fixed Issues

• Under certain conditions, the NAS could not start up.
• Under certain conditions, it was not possible to click Advanced Options at Control Panel > Network & File Services > Win/NFS > Microsoft Networking.
• iSCSI targets could sometimes not be detected due to Malicious Driver Detection errors.
• Under certain conditions, the default gateway would be cleared after configuring port trunking.
• Several minor bug fixes.

Other Changes

• For stability reasons, SSD cache (Cache Acceleration) can not be created using M.2 SSDs, QM2 cards, and PCIe NVMe SSDs on dual controller NAS devices (ES2486dc, ES1640dc v2, ES1686dc).