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by MayeulC 2333 days ago
It happens when drives are compliant with SATA 3.3+, but not the power cable: https://en.wikipedia.org/wiki/Serial_ATA#SATA_revision_3.3

> Power Disable feature allows for remote power cycling of SATA drives and a Rebuild Assist function that speeds up the rebuild process to help ease maintenance in the data center.

> The new Power Disable feature (similar to the SAS Power Disable feature) uses Pin 3 of the SATA power connector. Some legacy power supplies that provide 3.3 V power on Pin 3 would force drives with Power Disable feature to get stuck in a hard reset condition preventing them from spinning up. The problem can usually be eliminated by using a simple “Molex to SATA” power adaptor to supply power to these drives.