Working with target ports

6.10 LPAR mode z/VM guest

You can scan for ports, display port information, recover a port, or remove a port.

Scanning for ports
Newly available target ports are discovered. However, you might want to trigger a port scan to re-create accidentally removed port information or to assure that all ports are present.
Controlling automatic port scanning
If needed, you can fine-tune the frequency and timing of automatic port scans with the zfcp parameters port_scan_backoff and port_scan_ratelimit.
Displaying port information
For each target port, there is a number of read-only sysfs attributes with port information.
Recovering a failed port
Failed target ports are automatically recovered by the zfcp device driver. You can read the in_recovery attribute to check whether recovery is under way.
Removing ports
Removing unused ports can save FCP channel resources. Additionally setting the no_auto_port_rescan attribute avoids unnecessary attempts to recover unused remote ports.

Parent topic: SCSI-over-Fibre Channel device driver