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1  DAM Stuff / Backup Strategies and Tools / Re: SuperDuper verification on: December 21, 2009, 07:42:01 PM
Bob and Peter... thanks for you replies.  It looks like Chronosync is the winner!

I've used Norton Ghost on the PC side for years to clone my system drives, and ALWAYS used their verification function... it's too risky without it.  But NG won't work on a MAC.  The closest thing I've found for a MAC is CopyCatX.  It is supposed to be able to clone everything, including the Bootcamp partition and MAC partition, all in one pass.  The last time I checked, Carbon Copy Cloner and SuperDuper! can't do that.  Whether CopyCatX has a verification function, I'm not sure.  I've only used it for my system drive.

When I moved my photo files to a larger disk recently, I used Carbon Copy Cloner to move the files.  Then, I downloaded Apple's Xcode and used the FileMerge utility to compare files between the original and the copy on the new drive.  Assuming I used it correctly, everything was ok.  Kind of a pain to use with so many files, but the price was right.  Maybe I should have waited and used Chronosync.  I am going through everything and making a visual inspection.  So far, all is well.

Thanks again,
Tim
2  DAM Stuff / Backup Strategies and Tools / SuperDuper verification on: December 18, 2009, 11:33:41 AM
I'm starting to implement some of the suggestions from The DAM Book. Right now, I'm looking at backup software. I see from other forum posts that SuperDuper is a favorite for backup software with some folks. 

On page 225 of The DAM Book, Figure 6-13 shows that Chronosync has the option to verify that a file has been copied correctly by doing a comparison of the copy with the original.  I looked at SuperDuper's web site and manual to see if it had that capability.  I found nothing.  So I contacted SuperDuper's developer, and asked about it.  Here is his reply:

"No, because modern disk controllers flag errors when invalid data is read/written... I mean, does your word processor check that what it wrote to the disk when you saved the file is the data you saved? No, because if there's an error, you'll get an error... "

I'm sure there's some truth to what he says, but I'm wondering now if SuperDuper is really qualified for DAM purposes.  It looks to me like the extra step of file verification would be better for DAM purposes.  Perhaps Chronosync wold be a better choice.

I used Carbon Copy Cloner to copy files over to a new drive, but now I'm wondering if that is a good choice.  I can't find anything in their manual about file verification, either.  After making the switch to a new drive, I used Apple's FileMerge to compare the new files with the old, and they seem to be ok.  But it would be better to have it all in one package.

Any thoughts on this would be appreciated.

Thanks,
Tim Baker
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