ubuntu - dd records in records out different

05
2014-04
  • user2213307

    Simple question: is it OK if the output in dd for "records in" and "records out" are different by 1? Or is this an indication that a disk error has occured?

    96088211456 bytes (96 GB) copied, 873.174 s, 110 MB/s

    188736492+0 records in

    188736491+0 records out

    I am outputting a device /dev/sda to a file /media/ubuntu/HDD/backup.dd

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    Related Question

    linux - Harddisk formatting with dd return error
  • usajbalt

    I tried to format my harddisk (160 GB) with the following command

    dd   if=/dev/zero   of=/dev/sda

    After some 3 hours, following error came up:

    dd: writing to '/dev/sda' : No space left on device 
312581809+0 records in 
312581808+0 records out 
160041885696 bytes (160 GB) copied, 10708.3 s, 14.9 MB/s

    Any idea what went wrong?


    • Related Answers
  • Journeyman Geek

    well, if you wanted to wipe a disk 'shred' is the proper command. You'd then want to create partitions with fdisk, and use some variety of mk__fs (mke2fs etc) or parted to make a file system in the partition.

  • Hugh Allen

    /dev/zero is in principle infinite. /dev/sda is not.