sector size won't change with fdisk

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am trying to change the sector size from 512 to 2048 of my swap partition.



# fdisk -b 2048 /dev/mapper/fedora-swap


and then I try to write to it gives me the following message.




The partition table has been altered. Calling ioctl() to re-read
partition table. Re-reading the partition table failed.: Invalid
argument





partition fdisk block-device




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    up vote
    0
    down vote

    favorite












    am trying to change the sector size from 512 to 2048 of my swap partition.



    # fdisk -b 2048 /dev/mapper/fedora-swap


    and then I try to write to it gives me the following message.




    The partition table has been altered. Calling ioctl() to re-read
    partition table. Re-reading the partition table failed.: Invalid
    argument





    partition fdisk block-device




    share|improve this question






















      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      am trying to change the sector size from 512 to 2048 of my swap partition.



      # fdisk -b 2048 /dev/mapper/fedora-swap


      and then I try to write to it gives me the following message.




      The partition table has been altered. Calling ioctl() to re-read
      partition table. Re-reading the partition table failed.: Invalid
      argument





      partition fdisk block-device




      share|improve this question












      am trying to change the sector size from 512 to 2048 of my swap partition.



      # fdisk -b 2048 /dev/mapper/fedora-swap


      and then I try to write to it gives me the following message.




      The partition table has been altered. Calling ioctl() to re-read
      partition table. Re-reading the partition table failed.: Invalid
      argument






      partition fdisk block-device





      share|improve this question











      share|improve this question




      share|improve this question










      asked Jan 12 at 22:00









      alkabary

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          I think you have to "dismount" swap with the command 



          swapoff /dev/mapper/fedora-swap
          fdisk -b 2048 /dev/mapper/fedora-swap
          swapon /dev/mapper/fedora-swap


          I am not sure about syntax then man swapoff.






          share|improve this answer




















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            up vote
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            down vote













            I think you have to "dismount" swap with the command 



            swapoff /dev/mapper/fedora-swap
            fdisk -b 2048 /dev/mapper/fedora-swap
            swapon /dev/mapper/fedora-swap


            I am not sure about syntax then man swapoff.






            share|improve this answer
























              up vote
              0
              down vote













              I think you have to "dismount" swap with the command 



              swapoff /dev/mapper/fedora-swap
              fdisk -b 2048 /dev/mapper/fedora-swap
              swapon /dev/mapper/fedora-swap


              I am not sure about syntax then man swapoff.






              share|improve this answer






















                up vote
                0
                down vote










                up vote
                0
                down vote









                I think you have to "dismount" swap with the command 



                swapoff /dev/mapper/fedora-swap
                fdisk -b 2048 /dev/mapper/fedora-swap
                swapon /dev/mapper/fedora-swap


                I am not sure about syntax then man swapoff.






                share|improve this answer












                I think you have to "dismount" swap with the command 



                swapoff /dev/mapper/fedora-swap
                fdisk -b 2048 /dev/mapper/fedora-swap
                swapon /dev/mapper/fedora-swap


                I am not sure about syntax then man swapoff.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Jan 12 at 23:25









                MysticDog

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