The code name for the iMac was Elroy. You cannot low level format an IDE disk drive. The servo, sector layout and defect management information contained in the low level format is designed to last the life of the drive. This information and the way it is written cannot be duplicated in any way outside of the disk driver factory. Drives manufactured today ignore low level routines.
Some manufactures do have routines they label as a low level formatter.
It is used to purge the drive in the event of a corrupted master boot record or a boot block virus. Mentat Inc. makes Mentat TCP which is a key component of Open Transport . With less than 16 meg of memory free Background Printing may be slow. This doesn't include a printed manual or tech support, but both can be purchased. Version 5 has been out since 1996.