When good files go bad...
By khb on Aug 28, 2007
My current (and past to be candid) laptop of choice is a Mac. Laptops being easily stolen, an encryption technology like Apple's FileVault really is a must. But what happens when Something Bad(tm) happens during shutdown? Well, the image can become corrupt and then opening it is... well impossible.
Or so everyone told me. Google helped a bit., if I had kept backups of the \* sparse image itself, I might have been able to use this technique.
Not being one to give up easily, I copied the sparse image to another machine and started experimenting. having had good results from DataRescue in the past, I tried it. But as their support organization confirmed, they do can do nothignng for sparse images.
Diskwarrior could, but not so much with the version I had. So time to upgrade. Much to my annoyance, in the laptop itself the application bailed with a numeric error message. However, working on the desktop copy it ran flawlessly and restored the sparse image. It was then a simple matter to delete the version on the laptop and copy it over.
- Always make sure there is a second account on the laptop (good hygene suggests making it be the adminstrative account. But at least having a second account ensures a way forward ;>.
- Backups of course; but there's almost always some window of vulenerability where the backup isn't current. So keep current on your restoration/hacking options ;> Alsoft only offered the upgrade via CD, so by not having updated aggressively I cost myself a week of data outage.
- Things which aren't really secret, put them in the /Users/Shared area. That way they don't take up space in the sparse image, and are there post data disaster.
I still enjoy the strange looks I get running Solaris in full screen mode in coffee shops (via VMware's Fusion). Of course that requires an Intel based Mac.