As each day passes law enforcement and government agencies struggle with managing more sources of digital evidence and multimedia, like body worn cameras. The massive amounts of data storage required have led many to finally consider secure cloud-based storage solutions, but as some have found out, despite the minimal capital investment cloud storage costs can quickly exceed the LE & IT budgets of even the largest agencies. Let's break this down and talk specifically about digital evidence and archiving.

How are you archiving all of your digital evidence today? A tiered storage solution? Hybrid cloud solution? LTO tape? Hard drives? Optical discs (i.e. CD-R, DVD+/-R, BD-R)? Lots of questions and options, so lets talk specifically to the last group; those using optical discs.

Despite our efforts to educate everyone in the digital evidence chain on the proper way to label and care for CDs, DVDs, and BDs (see CD and DVD Care and Handling: Stop Destroying Your Evidence!), read errors still happen...a lot. Here are two of my favorite tools for repairing and recovering data from disc-based media.

Although disc-based storage is not as widely used as it once was for digital evidence archiving, it remains a viable solution when properly implemented and managed. In fact, many of the world’s largest technology companies are using and/or exploring disc-based storage systems for long-term offline storage of petabytes of customer data (e.g. Facebook uses 10,000 Blu-ray discs to store 'cold' data). They do so, however, in a managed environment with a thorough understanding of the medium’s strengths and limitations.

Many in law enforcement use write-once disc-based media for MASTER evidence storage, as it continues to be recommended via various industry best practice documents. Unfortunately, not everyone involved in the evidence chain understands the limitations and best practices as they relate to the care and handling of disc-based media. Adhesive labels, permanent markers, and ballpoint pens have destroyed more evidence than I care to even think about.

One of the tools many of us keep in the toolbox for recovering from CD/DVD was recently updated to support other types of media, to include removable drives and hard disks.  It's also added support for NTFS.  Not familiar with IsoBuster?  Check it out at www.isobuster.com

Believing there is a future for optical discs, Sony and Panasonic have said they will jointly develop a new next-generation standard capable of storing a minimum of 300GB on a single piece of media.

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If you believe what Apple is saying about the dying media format that is the CD/DVD (hence the lack of optical drives on the MacBook Air and the latest refresh of the Mac Mini), then you have to wonder why would a company still attempt to innovate the CD despite reports of its declining status. However, if you believe that optical media is still the best way to back up your data then perhaps the M-Disc might be something you could be interested in.

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