Hi, Gerardo Ballabio wrote: > then "cp image.iso /dev/sdb" (I suppose as root, so I used sudo).
It depends on the write permissions of /dev/sdb. > cp: cannot create regular file ‘/dev/sdb’: No medium found Strange error message. Do you see fresh messages in the system log after this has happened ? I just tried (Jessie 8.1 with fvwm and no sudo) cp debian-8.1.0-amd64-netinst.iso /dev/sdc as normal user "thomas" in group "thomas" with brw-rw---- 1 root thomas 8, 32 Sep 13 18:48 /dev/sdc (I have a script which opens access to "disks" except sda and sdb.) All is normal. Inspection of the stick yields the expected ISO filesystem with boot equipment and the usual nested partitions (which partition editors dislike). Without write permission i get cp: unwritable ‘/dev/sdc’ (mode 0660, rw-rw----); try anyway? y cp: cannot create regular file ‘/dev/sdc’: Permission denied So this is not the reason for "No medium found". What happens if you try to read from whole device or partition 1 ? dd if=/dev/sdb bs=1M count=1 of=/dev/null dd if=/dev/sdb1 bs=1M count=1 of=/dev/null Any error messages to see? The normal messages look like 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0580627 s, 18.1 MB/s Have a nice day :) Thomas
