Take the 2-minute tour ×
Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

When mounting images with the wonderful kpartx in verbose mode it displays some, likely very useful, information:

# kpartx -av wheezy_cln.img 
add map loop0p1 (252:2): 0 131072 linear /dev/loop0 2048
add map loop0p2 (252:3): 0 7825408 linear /dev/loop0 133120

I can guess, but does anyone know exactly what these numbers are?

share|improve this question

1 Answer 1

up vote 1 down vote accepted
  • loop0p1: device mapper name
  • (252:2): major:minor of the device
  • 0: starting block of the map (I've never seen anything else than 0)
  • 131072: size of the device in blocks
  • /dev/loop0: parent device
  • 2048: starting block (block 0 of loop0p1 is block 2048 of loop0)

Also see dmsetup table DEVICE

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.
{"cc_re__cc_re__cc_by_sa_3_0": ["                  <li><a href=\"//area51.stackexchange.com\" title=\"proposing new sites in the Stack Exchange network\">Area 51</a></li>\r\n                        <li><a href=\"//careers.stackoverflow.com\">Stack Overflow Careers</a></li>\r\n                    \r\n                </ol>\r\n            </td>\r\n    </tr>\r\n</table>\r\n                </div>\r\n            </div>\r\n\r\n            <div id=\"copyright\">\r\n                site design / logo &#169; 2015 stack exchange inc; user contributions licensed under <a href=\"http://creativecommons.org/licenses/by-sa/3.0/\" rel=\"license\">cc by-sa 3.0</a> \r\n                with <a href=\"http://blog.stackoverflow.com/2009/06/attribution-required/\" rel=\"license\">attribution required</a>\r\n            </div>\r\n            <div id=\"svnrev\">\r\n                rev 2015.3.26.2411\r\n            </div>\r\n            \r\n        </div>\r\n    </div>\r\n    <noscript>\r\n        <div id=\"noscript-warning\">Server Fault works best with JavaScript enabled<img src=\"http://pixel.quantserve.com/pixel/p-c1rF4kxgLUzNc.gif\" alt=\"\" class=\"dno\"></div>\r\n    </noscr"], "copyright__copyright__copyright": [" (252:2): major:minor of the device\n  \u2022 0: starting block of the map (I've never seen anything else than 0)\n  \u2022 131072: size of the device in blocks\n  \u2022 /dev/loop0: parent device\n  \u2022 2048: starting block (block 0 of loop0p1 is block 2048 of loop0)\n\nAlso see dmsetup table DEVICE\n\nshare|improve this answer\n\nYour Answer\n\n\u00a0\ndiscard\n\nBy posting your answer, you agree to the privacy policy and terms of service.\n\nNot the answer you're looking for? Browse other questions tagged or ask your own question."]}