Most firmware images already have USB or SATA support integrated in the default profile/image, so it should not be necessary to install additional packages.
To check, if USB support in included and if connected USB devices get detected:
dmesg in the terminal, note its output. These are “driver messages”, events related to hardware being connected/started or disconnected/shut-down.
2. Now connect your external storage device, wait a few seconds and then execute
dmesg on the terminal again.
3. If USB drivers are active and your device has successfully been recognized, you will notice that additional log output has been added at the end.
Here is an example of the dmesg text about an USB device being connected and properly recognized.
[ 96.603945] usb 1-1: new high-speed USB device number 2 using ehci-pci [ 96.812362] usb-storage 1-1:1.0: USB Mass Storage device detected [ 96.842945] scsi host4: usb-storage 1-1:1.0 [ 98.242956] scsi 4:0:0:0: Direct-Access JetFlash Transcend 8GB 1100 PQ: 0 ANSI: 4 [ 98.415163] sd 4:0:0:0: [sdb] 15826944 512-byte logical blocks: (8.10 GB/7.55 GiB) [ 98.443523] sd 4:0:0:0: [sdb] Write Protect is off [ 98.732241] sd 4:0:0:0: [sdb] Mode Sense: 43 00 00 00 [ 98.738043] sd 4:0:0:0: [sdb] No Caching mode page found [ 98.752681] sd 4:0:0:0: [sdb] Assuming drive cache: write through [ 98.893168] sdb: sdb1 sdb2 [ 98.951053] sd 4:0:0:0: [sdb] Attached SCSI disk
Further diagnostics information about connected USB drives can be obtained, when installing the optional 'usbutils' package:
opkg update && opkg install usbutils
This package installs the
lsusb command that will output information of the router-built in USB-hub and connected USB-devices. The following example was run on a router with a single USB port.
lsusb has recognized USB 2.0 and 3.0 support on this port and a connected device consisting of an USB-to-SATA-disk-bridge from ASMedia. Since this device is listed with the same bus-ID as the 3.0 hub, the USB-harddisk obviously is connected via the USB 3.0 protocol:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 002: ID 174c:1153 ASMedia Technology Inc. ASM2115 SATA 6Gb/s bridge Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
lsusb -t reveals, if your personal combination of device, LEDE firmware and external USB drive supports the newer and slightly faster USB 3.0 UASP Extension (USB Attached SCSI Protocol) or the older USB 3.0 block driver:
... /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M |__ Port 2: Dev 3, If 0, Class=Mass Storage, Driver=uas, 5000M |__ Port 4: Dev 5, If 0, Class=Mass Storage, Driver=usb-storage, 5000M ...
In this example, device 3 (“Driver=uas”) is UASP-capable, while device 5 (“Driver=usb-storage”) is not.
On USB storage device problems, pay attention to the “Driver” output of
lsusb -t. If it returned something like
|__ Port 4: Dev 5, If 0, Class=Mass Storage, Driver=, 5000M
|__ Port 4: Dev 5, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
then LEDE has recognized the attached USB storage device, but does not have an USB-Storage driver installed yet. In this case you will need to install USB storage drivers first:
opkg install kmod-usb-storage
For UASP driver support, install:
opkg install kmod-usb-storage-uas