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ru.linux
- RU.LINUX ---------------------------------------------------------------------
From : monstr 2:5020/400 28 Jun 2006 18:39:15
To : All
Subject : Hизкая скорость USB2.0
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Hello, All!
Подсоединил внешний HDD к USB2.0 порту и в
результате скорость чтения всего
1.5Mbytes/s. Это получается 12Mbits/s, как у USB1.1.
Почему? Как увеличить? Ведь USB2.0
позволяет передавать данные до 60Mbytes/s.
Загружен модуль ehci_hcd. Программа usbview
показывает, что "USB to IDE" устройство
подключено на скорости 480Mb/s к EHCI
контроллеру, тоже работающему на 480Mb/s.
# uname -a
Linux hostname 2.6.17.1 #1 PREEMPT Tue Jun 20 15:11:24 MSD 2006 i686
unknown unknown GNU/Linux
Материнская плата на чипсете VIA KM400.
# lspci -v
00:10.0 USB Controller: VIA Technologies, Inc. VT6202 [USB 2.0
controller] (rev80) (prog-if 00 [UHCI])
Subsystem: Elitegroup Computer Systems: Unknown device 1842
Flags: bus master, medium devsel, latency 32, IRQ 11
I/O ports at d000 [size=32]
Capabilities: <available only to root>
00:10.1 USB Controller: VIA Technologies, Inc. VT6202 [USB 2.0
controller] (rev80) (prog-if 00 [UHCI])
Subsystem: Elitegroup Computer Systems: Unknown device 1842
Flags: bus master, medium devsel, latency 32, IRQ 3
I/O ports at d400 [size=32]
Capabilities: <available only to root>
00:10.2 USB Controller: VIA Technologies, Inc. VT6202 [USB 2.0
controller] (rev80) (prog-if 00 [UHCI])
Subsystem: Elitegroup Computer Systems: Unknown device 1842
Flags: bus master, medium devsel, latency 32, IRQ 10
I/O ports at d800 [size=32]
Capabilities: <available only to root>
00:10.3 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 82)
(prog-if 20 [EHCI])
Subsystem: Elitegroup Computer Systems: Unknown device 1842
Flags: bus master, medium devsel, latency 32, IRQ 11
Memory at de000000 (32-bit, non-prefetchable) [size=256]
Capabilities: <available only to root>
# lsmod | grep usb
usb_storage 48960 1
libusual 13840 1 usb_storage
usbcore 104448 6
usb_storage,libusual,ohci_hcd,uhci_hcd,ehci_hcd
scsi_mod 77448 4 usb_storage,sr_mod,sg,sd_mod
# cat /proc/bus/usb/devices
T: Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 2.06
S: Manufacturer=Linux 2.6.17.1 uhci_hcd
S: Product=UHCI Host Controller
S: SerialNumber=0000:00:10.2
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms
T: Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 2.06
S: Manufacturer=Linux 2.6.17.1 uhci_hcd
S: Product=UHCI Host Controller
S: SerialNumber=0000:00:10.1
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms
T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 2.06
S: Manufacturer=Linux 2.6.17.1 uhci_hcd
S: Product=UHCI Host Controller
S: SerialNumber=0000:00:10.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 6
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 2.06
S: Manufacturer=Linux 2.6.17.1 ehci_hcd
S: Product=EHCI Host Controller
S: SerialNumber=0000:00:10.3
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=256ms
T: Bus=01 Lev=01 Prnt=01 Port=03 Cnt=01 Dev#= 2 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=05e3 ProdID=0702 Rev= 0.33
S: Product=USB TO IDE
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 96mA
I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50
Driver=usb-storage
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=125us
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* Origin: http://groups.google.com (2:5020/400)
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