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What happens if the host tries to select the drive during powerup, or during tape load/unload?

April 26, 2017drive happens host load powerup select tape tries unload

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What happens if the host tries to select the drive during powerup, or during tape load/unload?

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For about 1 second after powerup, the drive will not respond to selection, until the drive’s Power-On Self Tests (POST) complete a checkout of the SCSI interface hardware. For the next 10 or so seconds after that, selection will be responded to but any CDB will receive a Busy Status. Then, commands will be responded to normally, although the media may not be ready so media access commands will generally fail with a NotReady Sense Key. For load/unload commands: after an Unload is initiated, the media becomes not ready; after a Load (Immed=0) command completes, the media will be at BOT and ready for media access commands.