83dcdc8e   
   XPost: sci.electronics.design, alt.privacy, misc.legal   
   XPost: alt.photography   
   From: dkerber@WarrenRogersAssociates.invalid   
      
   [This followup was posted to alt.photography and a copy was sent to the   
   cited author.]   
      
   In article <8413291d-e327-4dc4-8722-839867426ed9   
   @p14g2000pra.googlegroups.com>, r_delaney2001@yahoo.com says...   
   >   
   > I was in a laundromat the other day, a typical   
   > downtown retail space.  It has 4 fisheye ceiling   
   > cameras.   4 cameras... a laundromat!   
   >   
   > I guess we've gotten used to it at this point -   
   > Big Brother is always watching.   
   >   
   > But really, they're recorders, not live watchers,   
   > except at places like WalMart. (ever looked   
   > at a WalMart ceiling?)  So my question is,   
   > for a small business, how long do they keep   
   > the DVD?  How far back do their records go?   
   >   
   > They have to swap a disc every 4 hours.  If   
   > they use DVD-R, how many discs do they   
   > typically store?   If DVD-RW, how often do   
   > they recycle the discs?  In either case, do they   
   > have hundreds of discs, going back months?   
   >   
   > Anybody have experience with security systems?   
   >   
   > I don;t know which board to address this question -   
      
      
   A lot of them go directly onto hard drives, and are overwritten after   
   anywhere from 7 to 30 days for retail stores.  I would imagine places   
   like banks or police stations may be kept indefintely.   
      
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