Rescan Linux Bus

http://misterd77.blogspot.com/2007/12/how-to-scan-scsi-bus-with-26-kernel.html

·  Find what's the host number for the HBA:

ls /sys/class/fc_host/

(You'll have something like host1 or host2, I'll refer to them as host$NUMBER from now on)

·  Ask the HBA to issue a LIP signal to rescan the FC bus:

echo 1 >/sys/class/fc_host/host$NUMBER/issue_lip

·  Wait around 15 seconds for the LIP command to have effect

·  Ask Linux to rescan the SCSI devices on that HBA:

echo - - - >/sys/class/scsi_host/host$NUMBER/scan

The wildcards "- - -" mean to look at every channel, every target, every lun.