Re: How long to keep surveillance tapes?

["Bob La Londe" <nospam@xxxxxxxxx>]

Most just cheaply keep only enough tape for one month (some only a week) and
recycle them every period.  A few keep 60 or 90 days of archives depending
on certain insurance or other ratings, and most new systems are getting
digital video with about 20-30 days of record time that continuously FIFO
over writes the old data.  Those with more storage requirements often find
its cheaper to add an external SCSI drive or setup an an automatic FTP
transfer to a remote storage site as opposed to buying a DVR with a terabyte
or more of storage.  500-600 gig units are pretty affordable.  Also, with
the cheaper (except Pelco) Windows based units you can always add an IDE
RAID controller and map a bunch of smaller commercially available hard
drives together to act as a single huge drive.  The problem is the stability
of Windows, the customer stupidly wanting to use an existing computer, or
wanting to use it for other stuff, and the inherent problem that with 4-8
ide drives working as a single large drive your chance of a drive failure
causing a problem increases exponentially.

I prefer an embedded OS 500-600 gig DVR with a SCSI port for most, and for
secure storage I prefer to use remote server space and FTP video archives.
For those companies with multiple sites FTP can be great as each site can
have a dedicated server for archiving video from other sites.  Timing and
bandwidth useage can be an issue, but many companies have dedicated
bandwidth connections and if you do your FTP transfer at times when the
interconnects are virtually idle it costs them nothing extra.  At worst in
the event of a catastrphic failure they might lose one day's recording.
Even that can be mitigated to some degree, by programming a secondary FTP of
the most recent video in the event of any alarm conditions from other
systems.

It can be complicated to manage and you have to get the IT personnel excited
by it.  If they don't fall in behind it they will come up with a million
excuses why you can't do it.
--
Bob La Londe
The guy who decides who we do business with.

The Security Consultant
PO Box 5720
Yuma, Az 85366

(928) 782-9765 ofc
(928) 782-7873 fax

Contractors License Numbers
ROC103040 & ROC103047



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