Apple IMAC User Manual - Page 97

Troubleshooting General/ HFS Plus Formatted Drives - 1 5 HFS Plus Formatted Drives The hard drive in the iMac is formatted with HFS Plus (also referred to as Mac OS Extended format). It is important to note that Norton Utilities version 3.5 is not compatible with HFS Plus (or Mac OS Extended format), and in fact, can destroy data on the hard drive. Norton Utilities version 3.5.3 or 3.5.2 will not attempt to repair a drive formatted with Mac OS Extended format and versions 3.5.1 and earlier cannot recognize that a hard drive is in Mac OS Extended format and can result in hard drive corruption and loss of all data on the drive. Note: When diagnosing hard drive problems, it is important to verify whether or not the customer may have used the wrong disk repair software for their drive before assuming that the problem is hardware related. If you experience problems with a hard drive that has been formatted with HFS+, Apple Computer recommends using Disk First Aid 8.2 (which is included on the system software CD that ships with the iMac). Disk First Aid 8.2 can be used to recover data that may have been deleted by Norton Utilities. (See the Symantec Web site at http://www.symantec.com/nu/numhfs.html for more information on Norton Utilities and Mac OS Extended format.) Some other disk utility and disk locking programs are incompatible with Mac OS Extended format. Before you attempt to use a disk utility or disk locking program, make sure the version you have is compatible with Mac OS Extended format. Check the documentation that came with the program or contact the manufacturer or the vendor that supplied the program. Use the Get Info command in System 8.1 to determine how a hard drive has been formatted. Drives formatted with HFS will appear as "Mac OS Standard", while drives formatted with HFS+ will appear as "Mac OS Extended." For more information on HFS Plus formatting of hard drives, refer to the Technical Info Library, article # 30344.