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Our first look at Power On Software's Rewind--a utility designed to restore your Mac's hard drive to a previous saved state--left us unimpressed by the program's performance. Rewind 1.2 corrects most of version 1.1's problems (mmmh; Reviews, April 2001): it doesn't constantly access the hard drive when updating its database, and it more quickly releases free hard-drive space.
However, some reliability problems remain. For example, after upgrading a PowerBook G4 from Mac OS 9.1 to Mac OS 9.2.1, I pressed the R key in an attempt to
boot from Rewind's Emergency Disk--a virtual startup drive set aside on the Mac's hard drive--but I was unsuccessful. I worked around the problem by deleting the Emergency Disk and replacing it with a new one created in OS 9.2.1. Then, after I rewound back to OS 9.1, booted from the Emergency Disk, and attempted to rewind back to OS 9.2.1, the PowerBook refused to boot up.
Macworld's Buying Advice
Although Rewind is getting better, there's still room for improvement. It can get you out of some sticky situations--but you shouldn't use it in lieu of a comprehensive backup strategy.