I know this is deadly boring, but did you know that your computer isn’t telling you if your pictures are being copied correctly and thoroughly? If you transfer files, including digital images, from one hard drive to another, or from a memory card to a hard drive, or from a hard drive to a DVD, there’s a chance that the transfer didn’t go quite as smoothly as your computer says it did. Sometimes the transfer errors are big, sometimes small, and sometimes they can seem to get worse over time. Errors may be a sign of trouble with your computer’s memory, drives, driver software, or almost any other part of the whole system. While I haven’t detected any trouble with my own system (yet), I’ve been reading about this lately and I’m starting to run through the process of validating my backup drives and DVDs. I’ll report back with more info when I get further along.
By way of explaining why this has come to my attention, here’s the story: I use an online service called PhotoShelter for delivering digital images to my clients. I pay for a certain amount of storage, and every now and then I have to remove some images to make room for new ones. In the past, before deleting pictures stored on PhotoShelter, I’ve downloaded them all to my computer and burned them to a new set of DVDs (they were burned to DVD when they were first UPloaded to PhotoShelter, possibly months before), to make sure that I had a copy of everything. This resulted in multiple copies, not being able to keep track of them, and spending a lot of time backing up pictures I was pretty certain I’d already backed up thoroughly. For a long time now I’ve had a better system in place and a lot more storage at PhotoShelter, but it still fills up. I want to delete a bunch of images from PhotoShelter, but first I want to validate that everything I have on hard drives is sound.
Here are a few links:
dpBestFlow.org – Peter Krogh, working with ASMP, has an in-depth discussion about data validation, including videos.
ImageIngester and ImageVerifier – ImageVerifier is free. The user manual (6.3 mb – look near the end) helps but not enough.
TheDAMforum – is tied to Peter Krogh’s The DAM Book, and is a great place to discuss Digital Asset Management issues.
DigLloydTools software suite – contains DiskTester, which will exercise a drive and help reveal flaws, and IntegrityChecker, which verifies backups
SynchronizeProX – produces validated transfers, as does
SuperDuper – free for the limited version.
DigitalFAQ – discussion of DVD media quality








Put A Watermark On Your Photos!
PlagiarismToday.com
Nice information today about putting watermarks on photos in order to protect them online. Clearly, sometimes it does not stop someone from stealing your pictures, but it certainly does help. Read the post here.
GHTime Code(s): 2c942