XPost: linux.debian.bugs.dist 
 From: kibi@debian.org 
  
 Hi, 
  
 Thomas Kragh  (2025-10-17): 
 > On the web page https://wiki.debian.org/DebianInstaller/CreateUSBMedia 
 > it is said that one can copy the debian.iso file directly to the media 
 > using: 
 > 
 > sudo cp debian.iso "$TARGET_DEVICE" 
 > 
 > However, "cp" reports the error:"cp: cannot create regular file '/dev/sdb': 
 No medium found" 
  
 The documented command has been working for many years and I don't 
 really see why it wouldn't work all of a sudden. 
  
 I've just verified on this specific Debian 12 system: 
  
     kibi@tokyo:~$ lsblk|grep sdb 
     sdb                                  8:16   1 29.9G  0 disk 
     kibi@tokyo:~$ sudo cp -v isos/debian-13.0.0-amd64-netinst.iso /dev/sdb 
     'isos/debian-13.0.0-amd64-netinst.iso' -> '/dev/sdb' 
  
 (-v is only about verbosity.) 
  
 What system are you running? Are you sure /dev/sdb was the correct 
 device in the first place? `dmesg` might give some hints about what 
 happened. 
  
  
 Cheers, 
 -- 
 Cyril Brulebois (kibi@debian.org)             
 D-I release manager -- Release team member -- Freelance Consultant 
  
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