When backuping MBR, is there a differece between dd with count = 2 and count = 1 with corresponding...





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For instance, I'm going to backup MBR from /dev/sda hdd.
I can do this in two ways:



dd if=/dev/sda of=~/mbr.bak bs=512 count=1
dd if=/dev/sda of=~/mbr.bak bs=256 count=2


Will I get different backups? Or it is just a matter of speed?










share|improve this question





























    0















    For instance, I'm going to backup MBR from /dev/sda hdd.
    I can do this in two ways:



    dd if=/dev/sda of=~/mbr.bak bs=512 count=1
    dd if=/dev/sda of=~/mbr.bak bs=256 count=2


    Will I get different backups? Or it is just a matter of speed?










    share|improve this question

























      0












      0








      0








      For instance, I'm going to backup MBR from /dev/sda hdd.
      I can do this in two ways:



      dd if=/dev/sda of=~/mbr.bak bs=512 count=1
      dd if=/dev/sda of=~/mbr.bak bs=256 count=2


      Will I get different backups? Or it is just a matter of speed?










      share|improve this question














      For instance, I'm going to backup MBR from /dev/sda hdd.
      I can do this in two ways:



      dd if=/dev/sda of=~/mbr.bak bs=512 count=1
      dd if=/dev/sda of=~/mbr.bak bs=256 count=2


      Will I get different backups? Or it is just a matter of speed?







      linux hard-drive dd






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Jan 31 at 18:34









      aryndinaryndin

      1154




      1154






















          1 Answer
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          How about trying it yourself and checking the results?



          # dd if=/dev/sda of=~/mbr.bak bs=512 count=1
          1+0 records in
          1+0 records out
          512 bytes copied, 0.00229764 s, 223 kB/s

          # dd if=/dev/sda of=~/mbr.bak2 bs=256 count=2
          2+0 records in
          2+0 records out
          512 bytes copied, 0.00235596 s, 217 kB/s


          Let's compare the results of the two commands, shall we?



          # cmp mbr.bak mbr.bak2
          #


          No differences, just as expected.






          share|improve this answer
























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            1 Answer
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            How about trying it yourself and checking the results?



            # dd if=/dev/sda of=~/mbr.bak bs=512 count=1
            1+0 records in
            1+0 records out
            512 bytes copied, 0.00229764 s, 223 kB/s

            # dd if=/dev/sda of=~/mbr.bak2 bs=256 count=2
            2+0 records in
            2+0 records out
            512 bytes copied, 0.00235596 s, 217 kB/s


            Let's compare the results of the two commands, shall we?



            # cmp mbr.bak mbr.bak2
            #


            No differences, just as expected.






            share|improve this answer




























              1














              How about trying it yourself and checking the results?



              # dd if=/dev/sda of=~/mbr.bak bs=512 count=1
              1+0 records in
              1+0 records out
              512 bytes copied, 0.00229764 s, 223 kB/s

              # dd if=/dev/sda of=~/mbr.bak2 bs=256 count=2
              2+0 records in
              2+0 records out
              512 bytes copied, 0.00235596 s, 217 kB/s


              Let's compare the results of the two commands, shall we?



              # cmp mbr.bak mbr.bak2
              #


              No differences, just as expected.






              share|improve this answer


























                1












                1








                1







                How about trying it yourself and checking the results?



                # dd if=/dev/sda of=~/mbr.bak bs=512 count=1
                1+0 records in
                1+0 records out
                512 bytes copied, 0.00229764 s, 223 kB/s

                # dd if=/dev/sda of=~/mbr.bak2 bs=256 count=2
                2+0 records in
                2+0 records out
                512 bytes copied, 0.00235596 s, 217 kB/s


                Let's compare the results of the two commands, shall we?



                # cmp mbr.bak mbr.bak2
                #


                No differences, just as expected.






                share|improve this answer













                How about trying it yourself and checking the results?



                # dd if=/dev/sda of=~/mbr.bak bs=512 count=1
                1+0 records in
                1+0 records out
                512 bytes copied, 0.00229764 s, 223 kB/s

                # dd if=/dev/sda of=~/mbr.bak2 bs=256 count=2
                2+0 records in
                2+0 records out
                512 bytes copied, 0.00235596 s, 217 kB/s


                Let's compare the results of the two commands, shall we?



                # cmp mbr.bak mbr.bak2
                #


                No differences, just as expected.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Jan 31 at 19:57









                telcoMtelcoM

                1,4291512




                1,4291512






























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