Disk replacement and firmware upgrade

Hi,

I've replaced a disk and added it using "isi devices -a add" command. Just after the disk was shown "HEALTHY", I've run "isi_disk_firmware_reboot" to check if it needed any update (I've got DiskFirmware 1.6 package installed) and was surprised that it needed it, hence a full node reboot.

I mean it seems completely crazy to restart a node just to replace a disk. The firmware upgrade should be done on the "isi devices -a add" command, no ?

Is this normal or did I miss something ?