Why Aren't the Media Validation Drives Showing in STA?

If the SL150's Drive Element Addressing mode is set incorrectly, the media validation drives will not appear in the STA application.

You must set the SL150 to Address All Drive Slots mode if using STA and media validation. If the mode is Address Only Installed Drives, the media validation drives will not show within STA.

See Configure Library Settings to change the Drive Element Addressing mode.