![]() ![]() Starting with the Macintosh Quadra 630 in July 1994, Apple transitioned from using SCSI to the more widely-used IDE interface for internal hard drives. ![]() These utilized a dedicated internal SCSI port for greater maximum throughput. The first Macs to be designed to accommodate an internal hard drive were the Macintosh SE and II, released in March and April 1987, respectively. ![]() Though it offered more space than 400 KB floppy disks used at the time, its maximum throughput was hampered by its reliance on being connected through the floppy drive connector. The first external hard drive sold by Apple for early compact Macs was the Hard Disk 20. The ProFile also supported the Apple II and Lisa series computers. This external drive contained a 5 MB Seagate mechanism that offered more storage space and speed than floppy drives. The first hard drive to be offered by Apple Computer was the ProFile, released for the Apple III in September 1981. Today's HDDs operate on high-speed serial interfaces i.e., serial ATA (SATA) or serial attached SCSI (SAS). They have maintained this position because advances in their recording density have kept pace with the requirements for secondary storage. Hard disk drives have been the dominant device for secondary storage of data in general purpose computers since the early 1960s. ![]()
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