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backup


  2  definitions  found 
 
  From  WordNet  r  1.6  [wn]: 
 
  backup 
  n  1:  someone  who  takes  the  place  of  another  (as  when  things  get 
  dangerous  or  difficult);  "the  star  had  a  stand-in  for 
  dangerous  scenes";  "we  need  extra  employees  for  summer 
  fill-ins"  [syn:  {stand-in},  {substitute},  {relief},  {backup 
  man},  {fill-in}] 
  2:  (computer  science)  a  copy  of  a  file  or  directory  on  a 
  separate  storage  device;  "he  made  a  backup  in  case  the 
  original  was  accidentally  damaged  or  erased"  [syn:  {computer 
  backup}] 
 
  From  The  Free  On-line  Dictionary  of  Computing  (13  Mar  01)  [foldoc]: 
 
  backup 
 
    (Sometimes  "back  up"  when  used  as  a  verb)  A 
  spare  copy  of  a  file,  file  system  or  other  resource  for  use  in 
  the  event  of  failure  or  loss  of  the  original. 
 
  The  term  is  most  commonly  used  to  refer  to  a  copy  of  all  the 
  files  on  a  computer's  {disks}  which  is  made  periodically  and 
  kept  on  {magnetic  tape}  or  other  removable  medium  (also  called 
  a  "{dump}"). 
 
  This  essential  precaution  is  neglected  by  most  new  computer 
  users  until  the  first  time  they  experience  a  {disk  crash}  or 
  accidentally  delete  the  only  copy  of  the  file  they  have  been 
  working  on  for  the  last  six  months. 
 
  Ideally  the  backup  copies  should  be  kept  at  a  different  site 
  or  in  a  fire  safe  since,  though  your  hardware  may  be  insured 
  against  fire,  the  data  on  it  is  almost  certainly  neither 
  insured  nor  easily  replaced. 
 
  See  also  {incremental  backup}.  Compare  {archive}. 
 
  (1998-04-17) 
 
 




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