Error message when trying to copy from cd-rom

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Author: Miles Beck
Date:  
Subject: Error message when trying to copy from cd-rom
hdc: cdrom_decode_status: status=0x51 { DriveReady SeekComplete Error }
hdc: cdrom_decode_status: error=0x34Aborted Command LastFailedSense 0x03

These messages continue over and over for every file that is tried to be
copied from the cd-rom.

Any ideas what this is?