fix: update E20C iStoreOS download link to official site

docs/dragon/q6a/hardware-use/hardware-info.md

@@ -27,3 +27,18 @@ sidebar_position: 1
 |  19  | 2x USB 2.0 Type-A 接口 |  20  | EDL 按键                                                         |  21  | 耳机插孔        |
 |  22  | 标准 HDMI              |  23  | eMMC & UFS 模块二合一接口                                        |  24  | RTC 电池接口    |
 |  25  | 2x MIPI CSI（2 通道）  |      |                                                                  |      |                 |
+
+## M.2 M Key 插槽安装说明
+
+Dragon Q6A 的 M.2 M Key 插槽支持 **M.2 2230** 尺寸的 NVMe SSD。
+
+### 安装步骤：
+1. 将 M.2 2230 NVMe SSD 以约 30° 角度插入 M.2 插槽
+2. 轻轻按下 SSD 使其与插槽接触良好
+3. 使用 **M2×3.5mm** 螺丝将 SSD 固定到主板上
+
+### 注意事项：
+- 确保使用正确的螺丝尺寸（M2×3.5mm）
+- 不要过度拧紧螺丝，以免损坏 SSD 或主板
+- Dragon Q6A 仅支持 **M.2 2230** 尺寸，不支持更长的 2242、2260 或 2280 尺寸
+- 该插槽仅支持 NVMe 协议 SSD，不支持 SATA 协议 M.2 SSD

docs/e/e20c/download.md

@@ -10,7 +10,7 @@ import Images from "./\_image.mdx"
 
 iStoreOS:
 
-[istoreos-22.03.6-2024062810-e20c-squashfs.img.gz](https://dl.radxa.com/rock2/images/istoreos/istoreos-22.03.6-2024062810-e20c-squashfs.img.gz)
+[istoreos-22.03.6-2024062810-e20c-squashfs.img.gz](https://site.istoreos.com/firmware/download?devicename=e20c)
 
 Radxa OS:
 

docs/orion/faq.md

@@ -49,3 +49,87 @@ sudo reboot
 </NewCodeBlock>
 
 说明：禁用后将释放 NPU 预留内存，如需恢复，删除 blacklist 配置并重启即可。
+
+## 2.USB3 批量传输期间设备断开/重新枚举问题
+
+在使用 Cypress FX3 等 USB3 设备进行高吞吐量批量传输时，可能会遇到设备断开并重新枚举的问题，导致 `LIBUSB_ERROR_NO_DEVICE` 错误。
+
+### 常见症状：
+- 设备在批量传输开始后约 1 秒断开连接
+- 内核日志显示：`usb 6-1: USB disconnect, device number 3` 后立即出现 `usb 6-1: new SuperSpeed USB device number 4 using xhci-hcd`
+- 程序报告 `LIBUSB_ERROR_NO_DEVICE` 错误
+
+### 可能原因：
+1. **电源稳定性**：USB3 设备在高速传输时可能超过端口电流限制
+2. **USB3 链路电源管理**：U1/U2 状态切换可能导致不稳定
+3. **xHCI 驱动/固件问题**：某些内核版本可能存在兼容性问题
+
+### 建议的排查步骤：
+
+#### 1. 检查电源供应：
+- 使用高质量的外接电源（5V/4A 或更高）
+- 对于高功耗设备，考虑使用带外接电源的 USB3 集线器
+- 确保 USB 线缆符合规范且质量良好
+
+#### 2. 调整 USB 电源管理设置：
+<NewCodeBlock tip="Linux$" type="host">
+
+```bash
+# 禁用 USB 自动挂起
+echo 'on' | sudo tee /sys/bus/usb/devices/*/power/control
+
+# 禁用 USB3 链路电源管理
+echo '0' | sudo tee /sys/module/usbcore/parameters/autosuspend
+```
+
+</NewCodeBlock>
+
+#### 3. 更新系统：
+<NewCodeBlock tip="Linux$" type="host">
+
+```bash
+sudo apt update
+sudo apt upgrade
+```
+
+</NewCodeBlock>
+
+#### 4. 检查内核版本：
+<NewCodeBlock tip="Linux$" type="host">
+
+```bash
+uname -r
+# 确保使用最新支持的内核版本
+```
+
+</NewCodeBlock>
+
+#### 5. 添加内核启动参数（临时）：
+在 `/boot/extlinux/extlinux.conf` 中添加：
+```
+usbcore.autosuspend=-1 usb-storage.quirks=...
+```
+
+#### 6. 收集诊断信息：
+<NewCodeBlock tip="Linux$" type="host">
+
+```bash
+# 检查 USB 拓扑
+lsusb -t
+
+# 监控内核日志
+sudo dmesg -w
+
+# 检查特定设备信息
+sudo lsusb -v -d 04b4:00f1
+```
+
+</NewCodeBlock>
+
+### 如果问题仍然存在：
+如果以上步骤无法解决问题，这可能是一个需要进一步调查的技术问题。请提供以下信息以便技术支持：
+
+1. 完整的 `dmesg` 日志
+2. `lsusb -t` 和 `lsusb -v` 输出
+3. 使用的具体镜像版本和内核版本
+4. 复现问题的详细步骤

i18n/en/docusaurus-plugin-content-docs/current/dragon/q6a/hardware-use/hardware-info.md

@@ -27,3 +27,18 @@ sidebar_position: 1
 | 19  | 2x USB 2.0 Type-A ports | 20  | EDL button                                                      | 21  | Headphone jack        |
 | 22  | Standard HDMI           | 23  | eMMC & UFS module connector                                     | 24  | RTC battery connector |
 | 25  | 2x MIPI CSI (2 Lane)    |     |                                                                 |     |                       |
+
+## M.2 M Key Slot Installation Guide
+
+The M.2 M Key slot on Dragon Q6A supports **M.2 2230** sized NVMe SSDs.
+
+### Installation Steps:
+1. Insert the M.2 2230 NVMe SSD into the M.2 slot at approximately 30° angle
+2. Gently press down the SSD to ensure good contact with the slot
+3. Secure the SSD to the board using an **M2×3.5mm** screw
+
+### Notes:
+- Ensure you use the correct screw size (M2×3.5mm)
+- Do not overtighten the screw to avoid damaging the SSD or motherboard
+- Dragon Q6A only supports **M.2 2230** size, longer sizes like 2242, 2260, or 2280 are not supported
+- This slot only supports NVMe protocol SSDs, SATA protocol M.2 SSDs are not supported

i18n/en/docusaurus-plugin-content-docs/current/e/e20c/download.md

@@ -10,7 +10,7 @@ import Images from "./\_image.mdx"
 
 iStoreOS:
 
-[istoreos-22.03.6-2024062810-e20c-squashfs.img.gz](https://dl.radxa.com/rock2/images/istoreos/istoreos-22.03.6-2024062810-e20c-squashfs.img.gz)
+[istoreos-22.03.6-2024062810-e20c-squashfs.img.gz](https://site.istoreos.com/firmware/download?devicename=e20c)
 
 Radxa OS:
 

i18n/en/docusaurus-plugin-content-docs/current/orion/faq.md

@@ -49,3 +49,87 @@ sudo reboot
 </NewCodeBlock>
 
 Note: Disabling will free the memory reserved for NPU. To restore, delete the blacklist configuration and reboot.
+
+## 2.USB3 bulk transfer device disconnect/re-enumeration issue
+
+When performing high-throughput bulk transfers with USB3 devices like Cypress FX3, you may encounter device disconnection and re-enumeration, resulting in `LIBUSB_ERROR_NO_DEVICE` errors.
+
+### Common symptoms:
+- Device disconnects approximately 1 second after bulk transfer starts
+- Kernel logs show: `usb 6-1: USB disconnect, device number 3` immediately followed by `usb 6-1: new SuperSpeed USB device number 4 using xhci-hcd`
+- Program reports `LIBUSB_ERROR_NO_DEVICE` error
+
+### Possible causes:
+1. **Power stability**: USB3 devices may exceed port current limits during high-speed transfers
+2. **USB3 link power management**: U1/U2 state transitions may cause instability
+3. **xHCI driver/firmware issues**: Certain kernel versions may have compatibility problems
+
+### Recommended troubleshooting steps:
+
+#### 1. Check power supply:
+- Use a high-quality external power supply (5V/4A or higher)
+- For high-power devices, consider using a powered USB3 hub
+- Ensure USB cables are specification-compliant and of good quality
+
+#### 2. Adjust USB power management settings:
+<NewCodeBlock tip="Linux$" type="host">
+
+```bash
+# Disable USB autosuspend
+echo 'on' | sudo tee /sys/bus/usb/devices/*/power/control
+
+# Disable USB3 link power management
+echo '0' | sudo tee /sys/module/usbcore/parameters/autosuspend
+```
+
+</NewCodeBlock>
+
+#### 3. Update system:
+<NewCodeBlock tip="Linux$" type="host">
+
+```bash
+sudo apt update
+sudo apt upgrade
+```
+
+</NewCodeBlock>
+
+#### 4. Check kernel version:
+<NewCodeBlock tip="Linux$" type="host">
+
+```bash
+uname -r
+# Ensure using the latest supported kernel version
+```
+
+</NewCodeBlock>
+
+#### 5. Add kernel boot parameters (temporary):
+Add to `/boot/extlinux/extlinux.conf`:
+```
+usbcore.autosuspend=-1 usb-storage.quirks=...
+```
+
+#### 6. Collect diagnostic information:
+<NewCodeBlock tip="Linux$" type="host">
+
+```bash
+# Check USB topology
+lsusb -t
+
+# Monitor kernel logs
+sudo dmesg -w
+
+# Check specific device information
+sudo lsusb -v -d 04b4:00f1
+```
+
+</NewCodeBlock>
+
+### If the issue persists:
+If the above steps don't resolve the issue, this may be a technical problem requiring further investigation. Please provide the following information for technical support:
+
+1. Complete `dmesg` logs
+2. `lsusb -t` and `lsusb -v` outputs
+3. Specific image version and kernel version used
+4. Detailed steps to reproduce the issue