■ OS Environment : Linux[RHEL 5.4 and later]
■ Application: scsi
■ Implementation Steps :
Suggest you NOT to scan the existing LUNs since I/O operations are still in use and if you scan them it will/may corrupt the file system. So, I always suggest you to scan the new added device or storage. Once you add it, HBA will detect the device and then you can scan this non-existent LUNs to the HBA. As an example you can execute the command like :
script rescan-scsi-bus.h comes with RHEL.
Following command can be used :
$ rescan-scsi-bus.sh --hosts=1 --luns=2
Note : I assume that on host 1/or on HBA 1, lun 2 doesn't exist.
For more details please get help from :
$ rescan-scsi-bus.sh --help