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hard drive - What is the purpose of this 4-pin interface on SATA HDDs and why doesn't it exist on SSDs? - Super User
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CORN SAS 22 Pin to 7 Pin + 15 Pin SATA Hard Disk Drive Raid Adapter with 15 Pin Power Port SCSI / SAS / InfiniBand Cables - Newegg.com
![hard drive - What is the purpose of this 4-pin interface on SATA HDDs and why doesn't it exist on SSDs? - Super User hard drive - What is the purpose of this 4-pin interface on SATA HDDs and why doesn't it exist on SSDs? - Super User](https://i.stack.imgur.com/zgHrl.jpg)