29 lines
1.5 KiB
Markdown
29 lines
1.5 KiB
Markdown
## Serial ATA (SATA)
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Helios64 use the JMicron JMB585 controller, this controller support up to 5 port SATA devices.
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The SATA controller support following features:
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- 5 SATA ports,
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- command-based and FIS-based for Port Multiplier,
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- compliance with SATA Specification Revision 3.2,
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- AHCI mode and IDE programming interface,
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- Native Command Queue (NCQ),
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- SATA link power saving mode (partial and slumber),
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- SATA plug-in detection capable,
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- drive power control and staggered spin-up,
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- SATA Partial / Slumber power management state.
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the SATA Controller is connected to the PCIe port in RK3399, the PCIe bus is compatible with PCI Express Base Specification Revision 2.1.
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Bandwidth of this PCIe is 5GT/s.
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Following graphics is showing the mux diagram of the SATA1 port and the M.2 connector :
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The M.2 devices installed in Helios64 is configured as sharing devices with SATA Port 1.
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Therefore if you install M.2 SATA module, you will not be able to access the SATA Port 1.
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The power delivery of the SATA Controller is devided into two group, this power control scenario is performed to reduce the inrush current when all the HDDs turned on simultaneously.
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The 8 Pin MOLEX connector for the SATA Connector is devided into two group (you will have custom cable from 8Pin Molex to 5 SATAs power connector).
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The first group will power on 3 HDDs in the initial stage, and the second group will power on another 2 HDDs later.
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