Mapping part of a block device: dmsetup vs losetup











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Suppose I want to create a virtual block device from an area on already existing block device. I can use either dmsetup (device mapper) or losetup for this purpose.



What are practical differences between those two approaches? I'm especially interested if one is better than the other performance-wise.






block-device loop-device device-mapper







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    up vote
    0
    down vote

    favorite












    Suppose I want to create a virtual block device from an area on already existing block device. I can use either dmsetup (device mapper) or losetup for this purpose.



    What are practical differences between those two approaches? I'm especially interested if one is better than the other performance-wise.






    block-device loop-device device-mapper







    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      Suppose I want to create a virtual block device from an area on already existing block device. I can use either dmsetup (device mapper) or losetup for this purpose.



      What are practical differences between those two approaches? I'm especially interested if one is better than the other performance-wise.






      block-device loop-device device-mapper







      share|improve this question













      Suppose I want to create a virtual block device from an area on already existing block device. I can use either dmsetup (device mapper) or losetup for this purpose.



      What are practical differences between those two approaches? I'm especially interested if one is better than the other performance-wise.






      block-device loop-device device-mapper




      block-device loop-device device-mapper






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 30 at 17:29









      Thunderbeef

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