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Functions

dd with progress bar and statistics

Terminal - dd with progress bar and statistics
sudo dd if=/dev/sdc bs=4096 | pv -s 2G | sudo dd bs=4096 of=~/USB_BLACK_BACKUP.IMG
2010-07-28 22:39:46
User: BruceLEET
Functions: dd sudo
18
dd with progress bar and statistics

This command utilizes 'pv' to show dd's progress.

Notes on use with dd:

-- dd block size (bs=...) is a widely debated command-line switch and should usually be between 1024 and 4096. You won't see much performance improvements beyond 4096, but regardless of the block size, dd will transfer every bit of data.

-- pv's switch, '-s' should be as close to the size of the data source as possible.

-- dd's out file, 'of=...' can be anything as the data within that file are the same regardless of the filename / extension.

Alternatives

There are 9 alternatives - vote for the best!

Terminal - Alternatives
sudo dd if=/dev/sdc bs=4096 | pv -s `sudo mount /dev/sdc /media/sdc && du -sb /media/sdc/ |awk '{print $1}' && sudo umount /media/sdc`| sudo dd bs=4096 of=~/USB_BLACK_BACKUP.IMG
export BLOCKSIZE='sudo blockdev --getsize64 /dev/sdc' && sudo dd if=/dev/sdc bs=1MB | pv -s $BLOCKSIZE | gzip -9 > USB_SD_BACKUP.img.gz
2013-02-05 18:10:25
User: hur1can3
Functions: dd export gzip sudo
2

This is a useful command to backup an sd card with relative total size for piping to pv with a progressbar

dd if=FILE | pv -s $(stat FILE | egrep -o "Size: [[:digit:]]*" | egrep -o "[[:digit:]]*") | dd of=OUTPUT
2011-02-09 22:21:06
User: andrepuel
Functions: dd egrep stat
1

Will automatically take the size of the file but longer, usefull only if in an function.

Know a better way?

If you can do better, submit your command here.

What others think

what about getting the filesize with stat instead of specifying manually?

Comment by izaac 225 weeks and 2 days ago

You can get the filesize a number of ways. Stat, ls, du, etc. I should really download pv.

Comment by kaedenn 225 weeks and 2 days ago

can you get the size of a disk, i.e. /dev/sda, with stat?

Comment by BruceLEET 225 weeks and 1 day ago
fdisk -l /dev/sda

will work, but you might need to use sed to get the info.

Comment by matthewbauer 224 weeks and 2 days ago

Your point of view

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