Procedure
SG3-utils
# yum install sg3_utils |
It depends on your particular backplane being visible to the host system (it should be visible as SCSI device under lsscsi -g).
In general, to turn on ID LED in a slot 1 of the /dev/sg4 enclosure you should invoke a command
# sg_ses --dsn=1 --set=ident /dev/sg4 |
and to Turn it off
# sg_ses --dsn=1 --clear=ident /dev/sg4 |