Morning All,I am interested in if and how people check for data rot amongst their files on drives and disks etc.
I ask as I recently suffered the following problem.
My pc is a 3yr 12gb ram, upgraded yesterday from a 120gb ssd to 500gb ssd OS os +programs C: drive.
A 120 gb ssd scratch disk for windows and Photoshop.
My D: drive consists of 4 x 1 tb WD red Nas drives onboard in raid 1+0 giving approx 1.86 gb. These drives replaced 4 x 3yr old samsung drives in the same configuration approximately a month ago.
I also have a 2yr old WD NAS 4 Tb Sharespace configured as raid 5. I use this as a backup target.
I have a 1.5tb external Seagate drive I use as a backup target as well.
My C: drive is my working drive, when files are finished processing, I transfer them to my master archive on the D: drive.
I run Memeo Backup premium. I run two identical plans apart from the backup destinations. I also do blu ray copies of 25gb folders in the master archive. I brought back copies of my files after I replaced the samsung drives with new WD Nas drives a month or so ago. I did have some problems with non essential files being restored. I am in contact with Memeo re this as a support request.
Now, after upgrading the C: drive yesterday, giving the system a clean copy of Win7 ultimate and replacing programs, my on board raid D: drive developed a fault. One drive was reporting an error and the raid was reporting itself as degraded. After pulling cables on at a time to isolate the individual drive (they are now labelled as to physical position) I found eventually the drive disappeared from the setup. After replacing cables and reseating them all properly, the drive was found and I could get it seen fine with no errors being reported in the bios or the raid manager. After booting into windows, the raid manager reported it was rebuilding the volume with my archive on it. After several hours, it reported a success! I suspect I may have loosened a cable whilst moving things in the case during the ssd installation.
One thing that struck me the day before the ssd was replaced though was I was tinkering with LR4 and happened to noticed an image in my catalog suffering data rot. When I looked at the image with an external editor, the rot was still there. When I brought the image back from both backups the rot was still there. So, what to do? The image was not important, it was one a friend had given me of a wedding he shot and we were using it for testing only.
The important question is though, How do I test the others for data rot? If they are changing due to it and then being backed up what to do? I have the backup software keep old versions as well but this was in them as well.
Is there any software that can scan for this sort of corruption?