usb 2-1.1: new high speed USB device number 11 using fsl-ehci
scsi6 : usb-storage 2-1.1:1.0
scsi 6:0:0:0: Direct-Access     E-Time   Udisk 2.0        2.60 PQ: 0 ANSI: 2
sd 6:0:0:0: [sdb] 8192000 512-byte logical blocks: (4.19 GB/3.90 GiB)
sd 6:0:0:0: [sdb] Write Protect is off
sd 6:0:0:0: [sdb] No Caching mode page present
sd 6:0:0:0: [sdb] Assuming drive cache: write through
sd 6:0:0:0: [sdb] No Caching mode page present
sd 6:0:0:0: [sdb] Assuming drive cache: write through
sdb: sdb1
sd 6:0:0:0: [sdb] No Caching mode page present
sd 6:0:0:0: [sdb] Assuming drive cache: write through
sd 6:0:0:0: [sdb] Attached SCSI removable disk

插拔U盘有信息返回，但在android系统下找不到U盘，在udisk目录下没有u盘数据，测试鼠标和键盘都是正常的。