According to a recent Apple Tech Info Library article, Apple has fixed a problem with Performa and Power Macintosh computers in the 5400 series, 5500 series, 6400 series, and 6500 series. The problem is evidenced by a flashing question mark on startup (which generally indicates that the Mac can’t find a valid System Folder). On these machines, inserting a CD-ROM or Disk Tools floppy with a valid System Folder enables the Mac to boot, but the Mac may then ask to initialize the hard disk. Don’t do it, or you’ll erase all your data. Instead, run Apple’s Disk First Aid or another disk utility, such as Norton Disk Doctor. To prevent this problem, download Drive Setup 1.3.1 (note that it comes as a 414K disk image and requires DiskCopy 6.1 or Aladdin’s ShrinkWrap 3.0) and use it to install new drivers on your internal hard disk. Make sure to read the Drive Setup 1.3.1 Read Me file before installing.
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