After volumes have been added, deleted, or resized, it is important to rescan LUNs on each affected initiator system. The most convenient way to rescan LUNs is by running the rescan-scsi-bus.sh script.
# rescan-scsi-bus.sh --forcerescan --hosts=34
Scanning SCSI subsystem for new devices
and remove devices that have disappeared
Scanning host 34 for SCSI target IDs 0 1 2 3 4 5 6 7, all LUNs
Scanning for device 34 0 0 0 ...
OLD: Host: scsi34 Channel: 00 Id: 00 Lun: 00
Vendor: FUSIONIO Model: ION LUN Rev: 3243
Type: Direct-Access ANSI SCSI revision: 05
0 new device(s) found.
0 device(s) removed.
NOTE: Failure to rescan LUNs after having reduced the size of a volume may lead to data loss.