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
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.
Sample Output
1.87GB 0:01:50 [17.3MB/s] [===============================>   ] 93%            
489472+0 records in
489472+0 records out
2004877312 bytes (2.0 GB) copied, 108.597 s, 18.5 MB/s
3915776+0 records in
3915776+0 records out
2004877312 bytes (2.0 GB) copied, 110.757 s, 18.1 MB/s

19
By: BruceLEET
2010-07-28 22:39:46

6 Alternatives + Submit Alt

What Others Think

what about getting the filesize with stat instead of specifying manually?
izaac · 412 weeks and 3 days ago
You can get the filesize a number of ways. Stat, ls, du, etc. I should really download pv.
kaedenn · 412 weeks and 2 days ago
can you get the size of a disk, i.e. /dev/sda, with stat?
BruceLEET · 412 weeks and 2 days ago
fdisk -l /dev/sda will work, but you might need to use sed to get the info.
matthewbauer · 411 weeks and 3 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

You must be signed in to comment.

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands



Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: