Rescan SCSI bus for new disks

This will rescan a SCSI bus on a RHEL machine to search for new disks:


# echo "- - -" > /sys/class/scsi_host/hostX/scan

where X is the SCSI bus number.

If you are using Emulex HBAs, there is a nice little wrapper script that comes with the drivers:


# /usr/sbin/lpfc/lun_scan

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