Return to previous pageHard Disk Identification

Drive Type Features Connector View
IDE. UDMA33, 66, 100 40 Pin male Data connector and 4 Pin Power 3½" Hard disk connector
Notebook IDE 44 Pin male Data connector including Power. 2½" Hard disk connector
SCSI Narrow 50 Pin male data connector and 4 Pin power connector. Most drives have Termination option Narrow SCSI Disk connector
SCSI Wide, Fast Wide, Ultra Wide, Ultra 160. 68 Female data connector and 4 Pin power connector. Most drives have Termination option Wide SCSI Disk connector

SCSI SCA

Single 80 way male Data connector including Power. Usually plug directly into a backplane or used in Hot Swap trays. Drive does NOT usually have Termination. SCA SCSI Disk connector
SCSI Hot Swap Used in servers to allow swapping of disk with power on. Each manufacturer has their own design's and generally bespoke. Compaq Hot Swap Tray ( Old Style )
Fiber Channel Used for fast storage arrays. Controllers very expensive.
MFM / RLL Two edge connector type data connectors and 4 Pin power. Old and not used any more.
ESDI Two edge connector type data connectors and 4 Pin power. Old and not used any more.
Microchannel Single edge connector including power. Specific to IBM PS/2. Old and not used anymore.
PCMCIA Hard disk with PCMCIA connector plugs directly into Notebook PCMCIA Slot
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