Hi,
I have a strange problem with any usb device that is recognized as usb storage device (KINGMAX usb flash 256M, SONY mp3 player and a couple of others).
When I transfer files FROM the device the speed is ok (around 6-8 M/s), but when I transfer files TO the device the speed is very low - 30-40k/s.
Here is some more information (when the KINGMAX usb flash is plugged in, but the problem is the same with all devices of this kind):
dmesg
Code:
usb 4-1: new high speed USB device using ehci_hcd and address 7
Initializing USB Mass Storage driver...
scsi0 : SCSI emulation for USB Mass Storage devices
usbcore: registered new driver usb-storage
USB Mass Storage support registered.
usb-storage: device found at 7
usb-storage: waiting for device to settle before scanning
Vendor: KINGMAX Model: USB Flash Disk Rev: 2.00
Type: Direct-Access ANSI SCSI revision: 02
Attached scsi generic sg0 at scsi0, channel 0, id 0, lun 0, type 0
usb-storage: device scan complete
sda: Unit Not Ready, sense:
: Current: sense key: Unit Attention
Additional sense: Not ready to ready change, medium may have changed
sda : READ CAPACITY failed.
sda : status=1, message=00, host=0, driver=08
sd: Current: sense key: Unit Attention
Additional sense: Not ready to ready change, medium may have changed
sda: test WP failed, assume Write Enabled
sda: assuming drive cache: write through
sda: Unit Not Ready, sense:
: Current: sense key: Unit Attention
Additional sense: Not ready to ready change, medium may have changed
sda : READ CAPACITY failed.
sda : status=1, message=00, host=0, driver=08
sd: Current: sense key: Unit Attention
Additional sense: Not ready to ready change, medium may have changed
sda: test WP failed, assume Write Enabled
sda: assuming drive cache: write through
sda: Unit Not Ready, sense:
: Current: sense key: Unit Attention
Additional sense: Not ready to ready change, medium may have changed
SCSI device sda: 512000 512-byte hdwr sectors (262 MB)
sda: Write Protect is off
sda: Mode Sense: 03 00 00 00
sda: assuming drive cache: write through
sda: sda1
Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0
lsusb
Code:
Bus 004 Device 007: ID 0ea0:2168 Ours Technology, Inc. Transcend JetFlash 2.0
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 005: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
Bus 003 Device 004: ID 046d:c216 Logitech, Inc.
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 005: ID 066f:4200 SigmaTel, Inc. STIr4200 IrDA Bridge
Bus 002 Device 004: ID 046d:0840 Logitech, Inc. QuickCam Express
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 003: ID 04a9:220d Canon, Inc. CanoScan N670U/N676U/LiDE 20
Bus 001 Device 001: ID 0000:0000
cat /proc/scsi/usb-storage/0
Code:
Host scsi0: usb-storage
Vendor: USB
Product: Flash Disk
Serial Number: None
Protocol: Transparent SCSI
Transport: Bulk
Quirks:
sfdisk -l
Code:
Disk /dev/sda: 1000 cylinders, 16 heads, 32 sectors/track
Units = cylinders of 262144 bytes, blocks of 1024 bytes, counting from 0
Device Boot Start End #cyls #blocks Id System
/dev/sda1 * 0+ 999 1000- 255984 b W95 FAT32
/dev/sda2 0 - 0 0 0 Empty
/dev/sda3 0 - 0 0 0 Empty
/dev/sda4 0 - 0 0 0 Empty
lsusb -v
Code:
Bus 004 Device 007: ID 0ea0:2168 Ours Technology, Inc. Transcend JetFlash 2.0
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0ea0 Ours Technology, Inc.
idProduct 0x2168 Transcend JetFlash 2.0
bcdDevice 2.00
iManufacturer 1 USB
iProduct 2 Flash Disk
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 39
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
MaxPower 200mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk (Zip)
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 1
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1
lsmod |grep usb -i
Code:
usb_storage 72832 2
scsi_mod 123432 3 sd_mod,usb_storage,sg
usblp 11008 0
hci_usb 13000 6
bluetooth 42564 17 bnep,rfcomm,l2cap,sco,hci_usb
usbhid 45216 0
usbcore 112252 10 usb_storage,xpad,stir4200,usblp,hci_usb,usbhid,ehci_hcd,quickcam,uhci_hcd
cat /sys/block/sda/device/max_sectors
I've tried to change the "max_sectors":
echo 128 >/sys/block/sda/device/max_sectors
echo 1024 >/sys/block/sda/device/max_sectors
and there was no result.
uname -r
I use Mandriva Linux 2005LE.
Under WinXP and Win98 running on the same machine there's no such problem.
Could someone help me with this problem please.
Transfer speed problem with USB storage devices
