all：
我们硬件使用一颗sata转usb的芯片将硬盘连接到dm8147的usb口，在进行大数据读与写的时候容易产生如下日志，产生这些错误后就不能读写硬盘，只能重启才恢复正常。我们使用的sdk版本DVRSDK3.5,目前项目进展到关键阶段，希望有人能帮忙！谢谢！：
musb-hdrc musb-hdrc.0: Data toggle same as previous (=0) on ep2
hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0002
usb 1-1: reset high speed USB device using musb-hdrc and address 2
sd 1:0:0:0: Device offlined - not ready after error recovery
sd 1:0:0:0: [sda] Unhandled error code
sd 1:0:0:0: [sda] Result: hostbyte=0x05 driverbyte=0x00
sd 1:0:0:0: [sda] CDB: cdb[0]=0x28: 28 00 15 6b 76 d8 00 00 f0 00
end_request: I/O error, dev sda, sector 359364312
sd 1:0:0:0: rejecting I/O to offline device
sd 1:0:0:0: rejecting I/O to offline device
sd 1:0:0:0: rejecting I/O to offline device
sd 1:0:0:0: rejecting I/O to offline device
sd 1:0:0:0: rejecting I/O to offline device
sd 1:0:0:0: [sda] Unhandled error code
sd 1:0:0:0: [sda] Result: hostbyte=0x01 driverbyte=0x00
sd 1:0:0:0: [sda] CDB: cdb[0]=0x28: 28 00 15 6b 77 c8 00 00 10 00
end_request: I/O error, dev sda, sector 359364552
sd 1:0:0:0: rejecting I/O to offline device
