Instructions  for  Disk  Imaging   Princeton  University  Archives   v.  2.2     2015  June  30   About:  The  purpose  of  this  optional  step  is  to  create  a  forensic  disk  image  of  digital  media  acquired  by  the  Library.  A   forensic  disk  image  will  allow  Library  staff  to  1)  regenerate  a  bit-­‐for-­‐bit  copy  of  a  drive  or  disk  and  2)  mount  the  drive  or   disk  as  a  read-­‐only  filesystem,  from  which  staff  can  explore  or  extract  data.  Important:  not  all  media  warrants  imaging.   As  a  general  practice,  the  Library  creates  disk  images  for  internal  hard  drives,  floppy  disks,  zip  disks,  and  DVD’s,  but  does   not  create  them  for  external  hard  drives,  USB  drives,  and  CD’s.     1. Click  on  Guymager  from  the  side  Desktop  ribbon.     2. Right  click  on  the  desired  device  and  select  Acquire   image.     3. The  Acquire  image  dialog  box  will  appear.  In  the  File   Format  section:   • Select  the  Expert  Witness  Format.   • In  the  Examiner  field,  type  your  name.   • In  the  Description  field,  enter  the  accession   number  and  disk  number.  For  example:   “AR.2015.001_Disk001”   • In  the  Notes  field,  enter  the  information  you   previously  transcribed  from  the  disk  label  into   AT  field  User  Defined  Text  3.     4. In  the  Destination  section:   • Under  Image  Directory  field,  click  the  ellipsis  to   browse  to  the  accession’s  images  folder.   • Under  Image  filename,  enter  the  Accession   Number  followed  by  an  underscore  and  the  disk  number.  For  example:  “AR_2015_001_Disk001”     5. In  the  Hash  calculation  /  verification  section,  ensure  that   the  following  boxes  are  checked:   • “Calculate  SHA-­‐256”   • “Verify  image  after  acquisition  (takes  twice  as   long)”     6. Click  Start.     7. While  the  imaging  is  taking  place,  a  dialog  box  will   appear  that  reports  on  the  image’s  progress  and   speed.    

I n s t r u c t i o n s   f o r   D i s k   I m a g i n g  


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  8. After  the  image  is  created,  the  dialog  box’s  “State”  field  will  change  to  Finished  –  Verified  &  ok.    

    9. Close  Guymager.  Safely  unmount  and  disconnect  the  drive  or  device.  If  you  have  more  disks  in  the  accession,  return   to  the  Running  a  Virus  Scan  step.  If  you  have  no  more  disks,  proceed  below.     10. Make  an  appropriate  entry  in  the  AT  accession  record  noting  the  results  of  the  imaging  process.  See  separate  log   entry  documentation  for  language  to  use.  

Instructions for Disk Imaging -

Jun 30, 2015 - ... to 1) regenerate a bit-‐for-‐bit copy of a drive or disk and 2) mount the drive or disk as a read-‐only filesystem, from which staff can explore or ...

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