The physical layer consists of the actual disk.

物理层由实际的磁盘组成。

youdao

This physical I/O channel configuration make multipath SAN possible at the physical layer.

这个物理 I/O 通道配置在物理水平让多路径 SAN 成为可能。

youdao

Architects, however, need to understand the physical layer in order to avoid network bottlenecks and security exposures.

但是，架构师需要了解物理层以避免网络瓶颈和安全暴露。

youdao

It features a simple interface and the physical key requirement provides an additional layer of security that avoids using a vendor's redirection service such as those offered by Cloud Engines for PogoPlug or Axentra for Netgear's Stora.

ENGADGET: Switched On: MyDitto NAS has some key issues