[  254.142632] ehci_irq: highspeed device connect
[  254.160042] ehci_irq: highspeed device disconnect
[  258.800669] ehci_irq: highspeed device connect
[  259.070068] usb 2-1: new high-speed USB device number 3 using sunxi-ehci
[  259.448265] scsi2 : usb-storage 2-1:1.0
[  259.449429] scsi3 : usb-storage 2-1:1.1
[  260.441377] scsi 3:0:0:0: Direct-Access     HUAWEI   SD Storage       2.31 PQ: 0 ANSI: 2
[  260.442463] scsi 2:0:0:0: CD-ROM            HUAWEI   Mass Storage     2.31 PQ: 0 ANSI: 2
[  260.444814] sd 3:0:0:0: [sda] Attached SCSI removable disk
[  260.445335] sr0: scsi-1 drive
[  260.446058] sr 2:0:0:0: Attached scsi CD-ROM sr0