-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 El 2013-08-06 a las 13:19 -0700, John Andersen escribió:
On 8/6/2013 1:13 PM, Carlos E. R. wrote:
Someone can explain why it works? Or why it should not work?
It worked because what ever Operating System he plugged it into knew how to mount an ISO as a loop-back device.
In other words, it shouldn't have worked, but it did on his machine and may on yours, but probably won't on many others.
In a perfect world he would not get to write onto a device mounted via loop, but who knows.
The ISO was not mounted at all, loop or otherwise. Loop is not involved in this. The stick was not mounted at all, either. It is a raw copy, despite the appeareances, not a file copy. At least, it works on Debian, Ubuntu, and openSUSE. I just did the reverse operation: # umount /media/openSUSE\ 12.3\ Live/ # time cp /dev/sdd image_cp real 1m46.887s user 0m0.069s sys 0m11.177s # # time dd if=/dev/sdd of=image_dd 3919872+0 records in 3919872+0 records out 2006974464 bytes (2.0 GB) copied, 103.094 s, 19.5 MB/s real 1m43.488s user 0m1.127s sys 0m24.280s # # cmp image_cp image_dd # Same image, success. interestingly, cp uses less CPU time. - -- Cheers Carlos E. R. (from 11.4, with Evergreen, x86_64 "Celadon" (Minas Tirith)) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (GNU/Linux) iF4EAREIAAYFAlIBYI8ACgkQja8UbcUWM1zBVwD/dgF2MewDr75c+/s4lqcZIvNn k+x1K2MmbcowxnsyyRcA/i8X1GdfxHbVkGahzPWgpJt0Vq7lnLpufgqgt+qJW+9O =qcvc -----END PGP SIGNATURE-----