Sunday, March 07, 2010

Storage space is a primary consideration. . .

We are always asked before a project, "How much storage space will this require?"  It's a fairly easy calculation.  If you can estimate the number of pages/images that will be scanned, the dpi used and will the final images be black and white, you can calculate a rough estimate of the overall storage size of the project.  As a rule of thumb, black and white images scanned at 200 dpi are typically 50 KB.  For color, the average image size can be 30 to 200 times as large as a comparable black and white image - consequently, estimating storage requirements for a color scanning project are a bit more complicated.  Just use this rule of thumb - it's going to be a heck of a lot more than black and white.  There is good news; in today’s world, memory is cheap so storing your color images is not cost prohibitive or difficult.  A 1 TB SATA hard drive can be purchased for about $100.  

Recently, we were doing a conversion project for a client that required 300 dpi and color detection scanning.  Approximately 30% of the images were in color and required considerable more space to store.  The overall project required over 1 TB (that's right kids; over 1000 GigaBytes) of storage for the raw scanned images.  We needed to scan onsite and then process the images back at the office.  Fortunately, we could compress the color images using PSI Capture; however, the overall project will still take about 500 GB to store all of the images and index data.  Again, memory is cheap and our client quickly implemented a solution to store all of the images and data.

Off-site hosted storage is becoming a more viable solution as internet access speed increase and the cost of memory decreases.  Twin Imaging now has the ability to offer our customers up to 1 Petabyte of Tier III hosted storage.  Our service will offer secure hosted access with content managed solution to easily organize and search for your hosted content.  Please contact or 760-683-7398 for more information.

Sean Martin, Vice President


Anonymous said...

Another consideration to think about is do you want these documents kept in the United States or do you care if they get moved overseas. Or converted to tape format from the more modern and reliable hard drive format.
In addition to the cost of the hardware for your long term storage needs after documents are scanned can that storage space be expanded with out incurring additional hardware costs.
Also think about disaster recovery / secondary off site data storage. So you don't put all of you're eggs in one basket so to speak.
Your ability to offer both sides of the scanning solution is a great idea.

Twin Imaging said...

Great comments - thanks!

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