Notices, 10:08 AM # 1 taylorkh.
If he is correct, then it does not encrypt the entire disk then.
Doing the same with /dev/urandom takes an impossibly long time.
If the reading from /dev/urandom is the slow down, you could create a file that is a fraction of the free space containing random bytes and then try cat'ing it into a fifo in a loop.Hello, I've performed a little portfolio manager mac os x test, comparing /dev/zero to /dev/urandom, with different bs values.Last edited by jschiwal; at 10:34.The only way runic games torchlight 2 to undelete that I've found is complicated and involves two or three programs.But if that would be true, then the "Encrypt the new Ubuntu installation for security" option in the installer is not full disk encryption at all.In a subshell, the dd command could read it from the fifo file.If you have deleted data you feel needs to be kept out of the hands of a third party by using a free space wipe then you should go with random wipes.Originally Posted by iRun Thanks.On the Windows box I wipe the free space on all 3 partitions on a nightly basis - 1 pass.On the same drive on my Linux box - same drive model and about the same processor - wiping the same amount of space with sfill (from secure-delete) failed to complete a single pass in 8 hours.
Originally Posted by solitaire best way to "wipe" empty space is to use the "dd" command.
I'm trying to figure out how to basically shred all the unused space on my hard drive, like what the "shred" command does to individual files.
Then wouldn't you just have to download crap to fill it up?
Txt /data2/l else echo Filesystem full /Desktop/wipe.
Getting back onto this problem after a couple of months I find that I have several scripts sitting around from earlier attempts.
Did you clear the free space while the computer was running?
Which essentially does what secure delete and shred do: fill your drive with garbage, then wipe the garbage out.So, given that zero is so much faster than urandom I had to go out there and figure out why you'd wipe a drive with random data at all.Jschiwal, 03:42 PM # 9 Scorr LQ Newbie Registered: Feb 2009 Posts: 6 Rep: Take a magnet to it!This made a dd image of a partition compress much better.Besides, nobody except maybe the CIA or FBI will be able to get the data back after zeroing like this.The drive in question contains a single file system which is used for data storage as a Samba share point.The 36 pass Gutman wipe was invented in a time when disk density was way lower than it is today, and further more, it is designed to cover a number of different storage techniques, so, according to Gutman himself (same link, epilogue) the 36 pass.I mean my first thought was, hey, it's magnetism, if we wipe it quickly with zeros we're able to do unikey full moi nhat it many times, and that'll do the trick.Perhaps if I get the block size optimized I will be in business.Org is looking for people interested in writing Editorials, Articles, Reviews, and more.A one pass wipe of 130 GB on a 320 GB sata drive takes about 1 hour.