Can be run from Recovery Partition, offers partition table repair, more
A once-essential utility for Mac owners has returned after several years of only minor updates with a major new version that offers significant changes and improvements. DiskWarrior 5.0 by Alsoft is something of a one-trick pony, in that it primarily repairs and optimizes OS X directories -- but this can often be used to save data from failing hard drives, prevent failures in the first place, or rescue data from flash drives where directory corruption is a common problem, among other instances. The new 5.0 version supports Apple Fusion and CoreStorage homebrew "Fusion" drives, repairs partition table damage (especially vital for multi-system boot users) and much more.
First Look at DiskWarrior
Operating systems have many file- and directory-level settings that are invisible to the typical users. There are files that govern the location of data, invisible files that relate to the trash or other system-essential files, permissions, and so on. Even though these files are unseen, they are none-the-less important, and a minor corruption in these files could potentially lead to a disastrous experience. DiskWarrior 4.1 brings its renowned volume repair methods to Leopard, which helps users keep their drives healthy.
DiskWarrior 4.1, Leopard
Alsoft today unveiled DiskWarrior 4.1, an update to its disk and file repair utility, bringing Mac OS X 10.5 Leopard compatibility and support for the new operating system’s features. The new version is able to scan and repair damaged directory hard links, which are used by Time Machine backups; Alsoft claims DiskWarrior 4.1 is the only utility on the market that can repair these issues. DiskWarrior 4.1 is available from Alsoft’s website for $100.