SATA

Introduction

There are 4 SATA ports and 1 M.2 SATA port on the ITX-3588J
development board.




Precautions:

Use the official <font color=#ff00>12V/7A power adapter</font>,
otherwise the SATA hard disk may not be recognized due to insufficient
power supply.

M.2 SATA interface, please select <font color=#ff00>SATA protocol SSD
</font> instead of NVME protocol SSD

Software configuration

The available hardware resources of RK3588 SATA and the corresponding
relationship between the "sata" controller node and PHY node on the
software are shown in the figure:   The 4 SATA ports and 1 M.2 SATA
port on the ITX-3588J development board are all ports extended by the
"SATA PM" expansion chip, which uses the RK3588's SATA0 group of
resources.

DTS configuration

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

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

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

   &sata0 {
       status = "okay";
   };

   &vcc_sata_pwr_en{
       status = "okay";
       gpio = <&pca9555 PCA_IO1_2 GPIO_ACTIVE_HIGH>;  //PCA_IO 12
   };

"sata0"：sata0 controller node

"combphy0_ps"：PHY node

"vcc_sata_pwr_en"：M.2 SATA power pin node

In "kernel-5.10/arch/arm64/boot/dts/rockchip/rk3588s.dtsi", the "pcie"
controller node that is reused with it has been turned off by default:

   pcie2x1l2: pcie@fe190000 {
       ...
       status = "disabled";
       ...
   };

"pcie2x1l2"："pcie" controller node multiplexed with "sata0"

Mount

Auto mount

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

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

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