12. SATA

12.1. Introduction

There is a M.2 SATA port on the AIO-3588MQ development board.

The software can be configured as M.2 SATA3.0 to support SATA SSD , or it can be configured as M.2 PCIe2.0 to support NVMe SSD .

The default software configuration is M.2 SATA3.0, which supports the SATA SSD .

12.2. Software configuration

12.2.1. Method 1:Modify system settings

Settings->Connected devices -> M.2 SSD Type

Select the option SATA or PCIe that needs to take effect

The modification will take effect only after the system is restarted

12.2.2. Method 2: DTS configuration

Generally, configure the power supply pins in DTS according to the schematic diagram, select the correct controller node and PHY node to enable, and close the controller node that is multiplexed with it.

There is the following configuration in kernel-5.10/arch/arm64/boot/dts/rockchip/rk3588-firefly-aio-3588q.dtsi:

#define M2_SATA_OR_PCIE 1 /*1 = SATA , 0 = PCIe */

/* sata pm */
&combphy0_ps {
	status = "okay";
};

#if M2_SATA_OR_PCIE
&sata0 {
	status = "okay";
};
#else
&pcie2x1l2 {
	reset-gpios = <&pca9555 PCA_IO1_6 GPIO_ACTIVE_HIGH>;
	vpcie3v3-supply = <&vcc_sata_pwr_en>;
	status = "okay";
};
#endif

&vcc_sata_pwr_en{
	status = "okay";
	gpio = <&pca9555 PCA_IO1_2 GPIO_ACTIVE_HIGH>;  //PCA_IO 12
	regulator-min-microvolt = <3300000>;
	regulator-max-microvolt = <3300000>;
	regulator-always-on;
	enable-active-high;
	startup-delay-us = <5000>;
	vin-supply = <&vcc12v_dcin>;
};

sata0：sata0 controller node

combphy0_ps：PHY node

pcie2x1l2：pcie2x1l2 controller node

vcc_sata_pwr_en：M.2 SATA power pin node

M2_SATA_OR_PCIE：The default value is 1, which is configured as SATA3.0. If it needs to be configured as PCIe2.0, it needs to be modified to 0.

12.3. Mount

12.3.1. Auto mount

Format the hard drive to a usable format in the Android system interface to mount it automatically at boot

12.3.2. Command to mount manually

• Find device nodes

ls /dev/block/sd*                                 
/dev/block/sda

• Formatted as EXT4 file format

mkfs.ext4 /dev/block/sda

• Mount

mount /dev/block/sda /mnt/media_rw/

• View the mount path

df -h
/dev/block/sda               916G  24K  916G   1% /mnt/media_rw

or

cat /proc/mounts  | grep sda
/dev/block/sda /mnt/media_rw ext4 rw,seclabel,relatime 0 0

12.4. Read and write speed

The transfer rate of SATA3.0 is theoretically 6.0 Gbps. You can refer to the following commands to test the read and write speed:

• dd

# The path is modified according to the actual mount path
# Write 1G file
echo 3 > /proc/sys/vm/drop_caches
busybox dd if=/dev/zero of=/mnt/media_rw/41AD-09EA/test1 bs=1M count=1024 conv=sync
# Read 1G file
echo 3 > /proc/sys/vm/drop_caches
busybox dd if=/mnt/media_rw/41AD-09EA/test1 of=/dev/null conv=sync

• fio

# Using fio will format the hard drive
# Write
fio -filename=/dev/block/sda -direct=1 -iodepth 1 -thread -rw=write -ioengine=psync -bs=1M -size=200G -numjobs=30 -runtime=60 -group_reporting -name=mytes
# Read
fio -filename=/dev/block/sda -direct=1 -iodepth 1 -thread -rw=read -ioengine=psync -bs=1M -size=200G -numjobs=30 -runtime=60 -group_reporting -name=mytes