https://docs.oracle.com/cd/E28853_01/html/E28858/z40001491569780.html
Drive OK to Remove LED Might Not Illuminate When a Drive is Unconfigured (16051551) - SPARC T5-2...
This issue only applies to servers running the Oracle Solaris 10 1/13 OS. If you use the cfgadm command to unconfigure a drive, the drive's blue Ok to Remove...