qnap check file system volume could not be unmounted

This is the same kind of encryption we’ve seen in Synology, and analyzed in Forensic Analysis of Synology NAS Devices. Volume encryption does affect the performance, albeit the effect is relatively minor. Volume encryption can protect single-disk and static volumes as well as volumes located on multi-disk storage pools. Volume encryption is software based it works on the level of individual volumes. This type of encryption is available in most QNAP models. The use of SED encryption does not affect performance, yet its scope of protection is limited. In QNAP devices, SED works on the Storage Pool level. SED encryption is the lowest encryption layer. SED encryption can be used on individual drives as well as on multiple drive storage pools, enabling the creation of fully encrypted storage pools. SED encryption support is available in select QNAP models, providing hardware-based encryption for hard drives with encryption support.

The majority of current QNAP NAS devices support at least one type of encryption, while certain types of devices support layered protection with several types of encryption. Supported Encryption Types and Applicable Hardware In this research, we’ll be discussing the types of encryption used in QNAP NAS devices. Yet, things aren’t all black and white, as QNAP also offers folder-based and SED encryption in many (but not all) models.

While Synology, in its home and small office models at least, relies exclusively on per-share, file-based encryption via eCryptFS, QNAP tends to favor volume-based encryption.

Both companies advertise support for hardware-accelerated AES encryption, yet the implementation is very different between the two brand. Home users and small offices today are served by two major manufacturers of network attached storage devices: QNAP and Synology. Today we are publishing the results of our analysis of data encryption used in QNAP devices. We were somewhat disappointed by the company’s choice to rely on a single encryption layer with multiple functional restrictions and security reservations. A year ago, we analyzed the encryption used in Synology NAS devices.

Qnap check file system volume could not be unmounted