kobol-wiki/docs/helios64/sata.md

63 lines
1.9 KiB
Markdown
Raw Normal View History

# Serial ATA (SATA)
Helios64 uses the JMicron JMB585 Serial ATA (SATA) controller to provide 5x SATA 3.0 ports.
![SATA ports location](/helios64/img/sata/sata.jpg)
The SATA Controller is connected to RK3399 SoC via 2x lanes PCIe 2.0 offering 10GT/s (8Gbps) of bandwidth.
## SATA Controller Features
- 5 SATA ports,
- Command-based and FIS-based for Port Multiplier,
- Compliance with SATA Specification Revision 3.2,
- AHCI mode and IDE programming interface,
- Native Command Queue (NCQ),
- SATA link power saving mode (partial and slumber),
- SATA plug-in detection capable,
- Drive power control and staggered spin-up,
- SATA Partial / Slumber power management state.
## SATA Controller Diagram
![SATA Diagram](/helios64/img/sata/sata_diagram.jpg)
The above diagram shows the 2:1 MUX between SATA Port 1 and the M.2 connector. The M.2 SATA bus is shared with SATA Port 1, therefore if you install an M.2 SATA SSD card, SATA Port 1 (J3) will automatically get disabled.
## HDD Power
Helios64 provides on-board HDD power to supply up to 5x HDDs via header J7.
![J7 Location](/helios64/img/sata/j7.jpg)
The power delivery of the HDDs is devided into two group:
* HDD Rail A (Max. 3x Drives)
* HDD Rail B (Max. 2x Drives)
Helios64 implements a power staggering approach where *HDD Rail A* will be powered up first, then few seconds later *HDD Rail B* will be powered up. This power control scenario is performed to reduce the inrush current during disk spin-up.
### J7 Pinout
![J7 Location](/helios64/img/sata/j7_pinout.jpg)
| Pin | Signal Name |
|-----|-------------|
| 1 | 12V HDD Rail A |
| 2 | 12V HDD Rail B |
| 3 | 5V HDD Rail A |
| 4 | 5V HDD Rail B |
| 5 | GND |
| 6 | GND |
| 7 | GND |
| 8 | GND |
## HDD/SSD Harness
As part of Helios64 official enclosure, an HDD/SSD harness is provided to connected both SATA + Power signals between Helios64 board and the 5x HDD slots.
**Below the wiring diagram:**
![!HDD Harness](/helios64/img/sata/hdd_harness.png)