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10. SATA

10.1. Introduction​

There are 1 SATA ports and 1 M.2 SATA port on the AIO-3588SJD4 development board.

_images/usage_sata_interface.jpg _images/usage_sata2_interface.jpg

Precautions:

  • M.2 SATA interface, please select SATA protocol SSD instead of NVME protocol SSD

10.2. Software configuration​

The 1 SATA ports and 1 M.2 SATA port on the AIO-3588SJD4 development board are all ports extended by the USB3.0 expansion chip.

10.2.1. 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.

There is the following configuration in kernel-5.10/arch/arm64/boot/dts/rockchip/aio-3588sjd4.dtsi:

    vcc_3v0_sata: vcc-3v0-sata-regulator {
        compatible = "regulator-fixed";
        regulator-name = "vcc_3v0_sata";
        regulator-always-on;
        enable-active-high;
        status = "okay";
        gpio = <&pca9555 PCA_IO0_0 GPIO_ACTIVE_HIGH>;
    &#125;;

&combphy2_psu &#123;
        status = "okay";
&#125;;

&usbhost3_0 &#123;
        status = "okay";
&#125;;

&usbhost_dwc3_0 &#123;
        status = "okay";
        dr_mode = "host";
&#125;;

&vcc5v0_host &#123;
        status = "okay";
        /delete-property/ regulator-boot-on;
        gpio = <&pca9555 PCA_IO0_1 GPIO_ACTIVE_HIGH>;
        /delete-property/ pinctrl-names;
        /delete-property/ pinctrl-0;
&#125;;

usbhost3_0 usbhost_dwc3_0：USB3.0 controller node

combphy2_ps：PHY node

vcc_3v0_sata：M.2 SATA power pin node

10.3. Mount​

10.3.1. Auto mount​

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

10.3.2. Command to mount manually​

  • Find device nodes
ls /dev/block/sd*                                 
/dev/block/sda
/dev/block/sda1
/dev/block/sdb
/dev/block/sdb1
  • Formatted as EXT4 file format
mkfs.ext4 /dev/block/sda1
mkfs.ext4 /dev/block/sdb1
  • Mount
mount /dev/block/sda1 /mnt/media_rw/
mount /dev/block/sdb1 /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

10.4. 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/sda1 -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/sdb1 -direct=1 -iodepth 1 -thread -rw=read -ioengine=psync -bs=1M -size=200G -numjobs=30 -runtime=60 -group_reporting -name=mytes