Floppy Disc Controller Drivers9/17/2023 ![]() In the past, before most SCSI controller functionality was implemented in a single chip, separate SCSI controllers interfaced disks to the SCSI bus. For example, disks called "SCSI disks" have built-in SCSI controllers. Modern disk controllers are integrated into the disk drive. Shugart Associates Systems Interface, (SASI) was a predecessor to SCSI. Priam created a proprietary storage algorithm that could double the disk storage. ![]() ![]() Run length limited (RLL) controllers used data compression to increase storage capacity by about 50%. Modified frequency modulation (MFM) controllers were the most common type in small computers, used for both floppy disk and hard disk drives. They were typically implemented on a separate controller card. The disk controller (or "hard disk controller") is the circuit which allows the CPU to communicate with a hard disk, floppy disk or other kind of disk drive.Įarly disk controllers were identified by their storage methods and data encoding.
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