Questions tagged [sparsefile]

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21 votes
1 answer
24k views

Why didn't `dd conv=sparse` save space as I expected?

I was going to make an image of my old USB drive. I had good reasons to expect there were some blocks filled with zeros on the device, so to save some space I used conv=sparse option: dd if=/dev/sdb ...
Kamil Maciorowski's user avatar
9 votes
4 answers
6k views

copy|move sparse files on NTFS with Windows

How can I copy or move a sparse file from one NTFS volume to another NTFS volume while maintaining the sparseness using the native tools included with Windows? If there is no way to do this with the ...
Michael Yasumoto's user avatar
1 vote
2 answers
1k views

ddrescue, “size on disk” lower than total size, with possible impact on performance when writing to NTFS

The backstory is in my previous question and my own answer to it. At one moment I had two partial images created by ddrescue: one file on NTFS filesystem and the other on ext4. I had noticed quite ...
GabrielB's user avatar
  • 855
2 votes
1 answer
10k views

Change sparse attribute from an .iso file on Windows 8.1

I have few very large .iso files in my computer altogether about 1TB. All of them are sparse files and i want to remove the sparse flag/attribute from them, is there a way how to do it? Maybe some ...
Ricsie's user avatar
  • 123