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2. Commodore 64 peripherals - Wikipedia

   en.wikipedia.org/wiki/Commodore_64_peripherals

   Seagate ST 506 5 1 ⁄ 4-inch HDD with cover removed.. Late in 1984, Fiscal Information Inc., of Florida, demonstrated the Lt. Kernal hard drive subsystem for the C64.The Lt. Kernal mated a 10 megabyte Seagate ST-412 hard drive to an OMTI SASI intelligent controller, creating a high speed bus interface to the C64's expansion port.

3. Hard disk drive interface - Wikipedia

   en.wikipedia.org/wiki/Hard_disk_drive_interface

   Early interfaces. A data cable (top) and control cable (below) connecting a controller card and an ST-506 type HDD. Power cable not shown. The earliest hard disk drive (HDD) interfaces were bit serial data interfaces that connected an HDD to a controller with two cables, one for control and one for data.

4. SCSI connector - Wikipedia

   en.wikipedia.org/wiki/SCSI_connector

   SCSI hard drives showing 80-pin SCA connector (top), and separate 68-pin and power connectors plus configuration jumpers (bottom) SCSI backplane with 80-pin SCA connectors. Hard Drives are mounted on proprietary hot-swappable caddies. Single Connector Attachment, or SCA, is a type of connection for the internal cabling of Parallel SCSI systems ...

5. SATA - Wikipedia

   en.wikipedia.org/wiki/SATA

   A 3.5-inch Serial ATA hard disk drive A 2.5-inch Serial ATA solid-state drive. SATA was announced in 2000 [4] [5] in order to provide several advantages over the earlier PATA interface such as reduced cable size and cost (seven conductors instead of 40 or 80), native hot swapping, faster data transfer through higher signaling rates, and more efficient transfer through an (optional) I/O queuing ...

6. ST506/ST412 - Wikipedia

   en.wikipedia.org/wiki/ST506/ST412

   The ST506 HDD was the first 5.25 inch hard disk drive, introduced in 1980 [ 3] by Shugart Technology (now Seagate Technology ). It stored up to 5 megabytes after formatting (153 cylinders, 4 heads, 32 sectors/track, 256 bytes/sector) [ 4] and cost US$1,500 (equivalent to $5,547 in 2023). [ 5] The similar, 10-megabyte ST412 HDD was introduced in ...

7. Serial Attached SCSI - Wikipedia

   en.wikipedia.org/wiki/Serial_attached_SCSI

   In computing, Serial Attached SCSI ( SAS) is a point-to-point serial protocol that moves data to and from computer-storage devices such as hard disk drives and tape drives. SAS replaces the older Parallel SCSI (Parallel Small Computer System Interface, usually pronounced "scuzzy" [ 3][ 4]) bus technology that first appeared in the mid-1980s.