Backup the first 1MB of your volume

dd if=/dev/sdX of=/root/sdX.bin bs=1M count=1
This will copy the first 1MB of your /dev/sdX volume to your /root/sdX.bin file, where SDX is the name of the device you wish to copy the data from (Usually a hard disk) NOTE: Make sure you capitalize the M in field for BS.
Sample Output
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.0718711 seconds, 14.6 MB/s

By: dhing
2009-02-06 17:45:59

What Others Think

you should ideally set BS equal to the block size of your hard drive. this means if there are bad sectors in any given block, the copy will continue, and you will see which sector was skipped in the output. if you set bs =1M, then if there are any bad sectors the whole thing will fail. most hard drives block sizes these days are 4096, though older ones were often 512.
quaternio · 698 weeks and 3 days ago
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tillyracker · 58 weeks and 1 day ago
seofox · 31 weeks and 5 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?

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