zfcp HBA API (FC-HBA) support

Red Hat Enterprise Linux 9.2 LPAR mode z/VM guest

The zfcp host bus adapter API (HBA API) provides an interface for HBA management clients that run on IBM® Z.

As shown in Figure 1, the zfcp HBA API support includes a user space library.

This graphic is described in the preceding text. — Figure 1. zfcp HBA API support modules

The default method in Red Hat® Enterprise Linux® 9.2 is for applications to use the zFCP HBA API library directly. If you develop applications yourself, see Developing applications.

In a Linux on IBM Z environment HBAs are usually virtualized and are shown as FCP devices. FCP devices are represented by CCW devices that are listed in /sys/bus/ccw/drivers/zfcp. Do not confuse FCP devices with SCSI devices. A SCSI device is a disk device that is identified by a LUN.

For information about setting up the HBA API support, see zfcp HBA API support.