PROMISE Technology Inc.
20 April 2019
You can hot-plug the JBODs initially. Just power on the JBODs, let them boot fully, then connect both SAS cables at about the same time. Drive discovery will then take place and you can create new arrays and LUNs on the JBOD drives.
But after the LUNs have been created, you need to follow the proper shutdown/startup procedure.
Shutdown: shut down the raidhead first, wait till it powers off, then shut down the JBODs. If you use the GUI shutdown everything should power off properly.
Startup: power up the JBODs and let them fully boot, then power up the raidhead. This order is important.