Не удалось увидеть устройство на MaaS

Другой способ использования с помощью dd:

dd if=<source-file-path> iflag=skip_bytes skip=<dest-file-size> oflag=seek_bytes seek=<dest-file-size> of=<dest-file-path>

Пример: [!d5 ]

$ ls -l /home/user/u1404_64_d.iso
-rw-rw-r-- 1 user user 147186688 Jan  8 17:01 /home/user/u1404_64_d.iso

$ dd if=/boot/grml/u1404_64_d.iso \
  iflag=skip_bytes skip=147186688 oflag=seek_bytes seek=147186688 \
  of=/home/user/u1404_64_d.iso
1686798+0 records in
1686798+0 records out
863640576 bytes (864 MB) copied, 15.1992 s, 56.8 MB/s

$ md5sum /boot/grml/u1404_64_d.iso /home/user/u1404_64_d.iso
dccff28314d9ae4ed262cfc6f35e5153  /boot/grml/u1404_64_d.iso
dccff28314d9ae4ed262cfc6f35e5153  /home/user/u1404_64_d.iso

Это может быть вредно, так как он может перезаписать файл без проверки, здесь лучше проверить хэш перед продолжением:

ddc () {

    # enable hash check, need much time to read both files
    hashcheck=true

    # check destination folder existance or assume it's a file name
    if [ -d "$2" ]
    then
        ofpath="$2/`basename \"$1\"`"
    else
        ofpath="$2"
    fi

    # check destination file existance
    if [ ! -f "$ofpath" ]
    then
        a="n"
    else
        ofsize=`stat -c "%s" "$ofpath"`


        # calculate hash
        if [ $hashcheck ]
        then 
            ifhash=`dd if="$1" iflag=count_bytes count=$ofsize 2>/dev/null | md5sum | awk '{print $1}'`
            #ifhash=`head -c $ofsize "$1" | md5sum | awk '{print $1}'`
            ofhash=`md5sum "$ofpath" | awk '{print $1}'`

            # check hash before cont.
            if [ $ifhash == $ofhash ]
            then
                a="y"
            else
                echo -e "Files MD5 mismatch do you want to continue:\n(Y) Continue copy, (N) Start over, (Other) Cancel"
                read a
            fi
        else
            a="y"
        fi
    fi

    case $a in
    [yY])
        echo -e "Continue...\ncopy $1 to $ofpath"
        dd if="$1" iflag=skip_bytes skip=$ofsize oflag=seek_bytes seek=$ofsize of="$ofpath"
        ;;
    [nN])
        echo -e "Start over...\ncopy $1 to $ofpath"
        dd if="$1" of="$ofpath"
        ;;
    *)
        echo "Cancelled!"
        ;;
    esac

}

Использовать:

ddc <source-file> <destination-file-or-folder>

Пример:

$ ls -l /home/user/u1404_64_d.iso
-rw-rw-r-- 1 user user 241370112 Jan  8 17:09 /home/user/u1404_64_d.iso

$ ddc /boot/grml/u1404_64_d.iso /home/user/u1404_64_d2.iso
Continue...copy /boot/grml/u1404_64_d.iso to /home/user/u1404_64_d.iso
1502846+0 records in
1502846+0 records out
769457152 bytes (769 MB) copied, 13.0472 s, 59.0 MB/s