The virtualization platform cannot recognize a USB device. What should I do?

Cause

The iSerial field of the USB device is too long, preventing the virtualization platform from recognizing the device.

Solution

1. Run the following command to query details of all USB devices and determine whether the host recognizes them:

   [root@localhost ~]# lsusb.py -u

2. Run the following command to view details of a specific USB device and check whether the iSerial field is too long:

   [root@localhost ~]# lsusb -v -d  1908:1320

3. Run the following command to adjust the string length of the iSerial field in the UsbDeviceVO database table:

   [root@localhost ~]# mysql -uroot -pzstack.mysql.password
   MariaDB [(none)]> ALTER TABLE `zstack`.`UsbDeviceVO` modify column iSerial varchar(1024) DEFAULT NULL;