Determining the association between a Logical Unit Number (LUN) and a specific controller within a Linux environment involves identifying the path through which the storage is accessed. This process typically involves inspecting the system’s storage configuration, paying close attention to the device names and their corresponding hardware identifiers. For example, examining the output of commands such as `lsscsi`, `multipath -ll`, or querying the contents of `/sys/block` can reveal how storage devices are presented and connected to the host system.
Understanding this mapping is crucial for several reasons. It facilitates accurate troubleshooting of storage-related issues, enables effective performance monitoring, and ensures proper configuration of multipathing solutions for high availability. Historically, this mapping relied on direct SCSI connections. However, with the advent of technologies like Fibre Channel, iSCSI, and NVMe-oF, the process has become more complex, requiring a deeper understanding of the storage networking stack.
