How to use dd command to erase the data in disk Post: 302475088

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Operating Systems AIX How to use dd command to erase the data in disk Post 302475088 by rbatte1 on Friday 26th of November 2010 10:55:16 AM

11-26-2010

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That's not paranoid at all. We have a policy that all retired media, working or not has to be shredded. We store them up and on request a specialist company turn up with a van and shredder. The maximum permitted size of the pieces is half a centimetre square. Each item has it's serial number confirmed before destruction.

It you are going to reuse the disk elsewhere, just a simple delete will be fine if you trust yourself not to go fishing in future. Plug it in to the next server and format it ready for use. Adding it into a volume group, raid set or whatever will splat over the VTOC information anyway and then each filesystem you build will create new superblocks anyway.

If you want the info on the shredder company let me know.

Robin

rbatte1

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zerofill

zerofill(1)                                                        GNU Telephony                                                       zerofill(1)

NAME

       zerofill - clear unused disk space and blank devices.

SYNOPSIS

       zerofill [options] [devices] ...

DESCRIPTION

       This command is a relative of nullfile.  Like nullfile, it can be used to write all unused disk space with '0', thereby making file systems
       that are stored on virtual machines easier to pack.  In addition, zerofill can fill unused disk space  with  random  data  before  zeroing,
       which  can be useful to remove forensic trace of deleted files.  Finally, zerofile can be told to operate on and zero (erase) complete disk
       devices.

OPTIONS

       --random=count
              Number of passes to use writing random data before wiping data.

       --help Outputs help screen for the user.

AUTHOR

       zerofill was written by David Sugar <dyfet@gnutelephony.org>.

REPORTING BUGS

       Report bugs to bug-commoncpp@gnu.org.

COPYRIGHT

       Copyright (C) 2010 David Sugar, Tycho Softworks.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

GNU uCommon                                                        January 2010                                                        zerofill(1)