If it is the only 9490 in the room then yes. If there are other 9490's in the room then maybe no. Only one 9490 in an installation needs a floppy drive - to install updated firmware.
Open the back door of your 9490 and see if there is a box in the upper left cornor with a control panel and two black Ethernet LAN cables comiing out of it. That is the Subsystem Support Unit (SSU). If you have an SSU then you have a floppy drive.
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