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Apple HD SC Setup is a small software utility that was bundled with various versions of the classic Mac OS and A/UX operating systems made by Apple Computer.Introduced with Apple's first SCSI hard drive, the Hard Disk 20SC in September 1986, Apple HD SC Setup can update drivers and partition and initialize hard disks.
The Mac displays a floppy disk icon with a blinking question mark until the user inserts the correct disk. [23] In New World ROM Macs, a folder icon with a question mark that repeatedly changes to the Finder icon is shown if a System Folder or boot loader file cannot be found on the startup disk.
Target Disk Mode (sometimes referred to as TDM or Target Mode) is a boot mode unique to Macintosh computers. When a Mac that supports Target Disk Mode [1] is started with the 'T' key held down, its operating system does not boot. Instead, the Mac's firmware enables its drives to behave as a SCSI, FireWire, Thunderbolt, or USB-C external mass ...
Disk First Aid is a free software utility made by Apple Inc. that was bundled with all computers running the classic Mac OS. [1] This tool verifies and repairs a limited number of directory structure problems on any HFS or HFS Plus hard disk or volume.
The computer first executes a relatively small program stored in read-only memory (ROM, and later EEPROM, NOR flash) which support execute in place, to initialize CPU and motherboard, to initialize the memory (especially on x86 systems), to initialize and access the storage (usually a block-addressed device, e.g. hard disk drive, NAND flash ...
Mounting, unmounting and ejecting disk volumes (including both hard disks, removable media, and disk volume images) Enabling or disabling journaling; Verifying a disk's integrity, and repairing it if the disk is damaged (this will work for both Mac compatible format partitions and for FAT32 partitions with Microsoft Windows installed)
Formatting a disk for use by an operating system and its applications typically involves three different processes. [e]Low-level formatting (i.e., closest to the hardware) marks the surfaces of the disks with markers indicating the start of a recording block (typically today called sector markers) and other information like block CRC to be used later, in normal operations, by the disk ...
BIOS interrupt calls perform hardware control or I/O functions requested by a program, return system information to the program, or do both. A key element of the purpose of BIOS calls is abstraction - the BIOS calls perform generally defined functions, and the specific details of how those functions are executed on the particular hardware of the system are encapsulated in the BIOS and hidden ...