Usage: echo "scsi dump #N" > /proc/scsi/scsi
dump status of all scsi commands.  #N specifies dump detail level

Usage: echo "scsi log token #N" > /proc/scsi/scsi
token is one of [error,scan,mlqueue,mlcomplete,llqueue,llcomplete,hlqueue,hlcomplete]

Usage: echo "scsi add-single-device 0 1 2 3" > /proc/scsi/scsi
Usage: echo "scsi remove-single-device 0 1 2 3" > /proc/scsi/scsi
repalce "0 1 2 3" with your "Host Channel Id Lun".