Seeing some friends win or at least shortlisted in various photo competitions I thought I'd stop being lazy and start entering some myself.
To start with I picked a place I went to earlier this year, who runs a competition for photos taken either on their land or of them if elsewhere. So far so good? I was browsing the photos in DxO when I came across a batch of files indicated as "loading error". What does that mean? Sure enough, every program I had wouldn't recognise them. In part I never noticed this earlier, as my normal browser by default hides files it doesn't recognise, masking this possible problem.
No problem, I started up my backup server and looked at the same files on there. Normal. So why was the copy on my main desktop not openable?
I downloaded a hex editor so I can view the contents, and immediately saw the problem. The corrupt files were all zeros.
So in a moment I'll manually copy the good files back over the bad ones, but it does scare me that my new but almost full 6TB drive may have other bad files on it. This drive was bought only a couple months ago as a live copy bulk storage of all my historic data so far, moved on here from my previous live copy on 4 separate drives. That is separate again from my backup copy on different 4 drives.
Possibilities are the files were somehow corrupted before/during/after moving from old live drive to new live drive. I don't think I have any way to tell.
I suppose I could do a full scan of the 6TB drive to ensure there's no other errors with it. SMART data looks ok.
Now I have doubt on the integrity of the whole drive, I have few possibilities:
1, somehow scan for raw/jpeg files that are corrupt. If any exist, I may have a problem
2, do a binary compare of the enter drive against the backup. This will take forever!
3, assume the backup is correct, and overwrite everything on the live copy.
Thinking more, I think option 2 is the safe way to go. Does anyone know of software that can do that?
To start with I picked a place I went to earlier this year, who runs a competition for photos taken either on their land or of them if elsewhere. So far so good? I was browsing the photos in DxO when I came across a batch of files indicated as "loading error". What does that mean? Sure enough, every program I had wouldn't recognise them. In part I never noticed this earlier, as my normal browser by default hides files it doesn't recognise, masking this possible problem.
No problem, I started up my backup server and looked at the same files on there. Normal. So why was the copy on my main desktop not openable?
I downloaded a hex editor so I can view the contents, and immediately saw the problem. The corrupt files were all zeros.
So in a moment I'll manually copy the good files back over the bad ones, but it does scare me that my new but almost full 6TB drive may have other bad files on it. This drive was bought only a couple months ago as a live copy bulk storage of all my historic data so far, moved on here from my previous live copy on 4 separate drives. That is separate again from my backup copy on different 4 drives.
Possibilities are the files were somehow corrupted before/during/after moving from old live drive to new live drive. I don't think I have any way to tell.
I suppose I could do a full scan of the 6TB drive to ensure there's no other errors with it. SMART data looks ok.
Now I have doubt on the integrity of the whole drive, I have few possibilities:
1, somehow scan for raw/jpeg files that are corrupt. If any exist, I may have a problem
2, do a binary compare of the enter drive against the backup. This will take forever!
3, assume the backup is correct, and overwrite everything on the live copy.
Thinking more, I think option 2 is the safe way to go. Does anyone know of software that can do that?
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.