very slow usb 2.0
Hi there,
I have been looking around to solve this, but no one else seems to have had any similar roblems.
The thing is that I have an external hard drive and it takes forever to
copy files from/to it. Since it is USB2 there is something awfully
wrong.
I tested it on macosx and windoze and it works WAY much faster than on
linux (though I don't know exactly how much faster).
I am not mounting it using 'sync', which reportedly causes some troubles.
Here are some other things that might be of help:
* dmesg saying I connected the device;
usb 1-1: new high speed USB device using ehci_hcd and address 19
ub(1.19): GetMaxLUN returned 0, using 1 LUNs
uba: uba1
(notice the high speed);
* the entry on /proc/bus/usb/devices
T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 19 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=0402 ProdID=5637 Rev= 1.06
S: Product=USB 2.0 Storage Device
S: SerialNumber=00000000000123456789
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=ub
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=125us
(notice the 480 speed indication)
* output of mount
/dev/uba1 on /photobox type vfat (rw)
* lspci
0000:00:00.0 Host bridge: VIA Technologies, Inc. VT8377 [KT400/KT600 AGP] Host Bridge (rev 80)
0000:00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
0000:00:0f.0 RAID bus controller: VIA Technologies, Inc. VIA VT6420 SATA RAID Controller (rev 80)
0000:00:0f.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
0000:00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
0000:00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
0000:00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
0000:00:10.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
0000:00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
0000:00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge [K8T800 South]
(I really do have USB2!)
Since I copy the files to an 300Gb SATA HD I don't think that the problem could reside there.
I am absolutely clueless here. Any help is appreciated. I also did not
find a way to correctly test the device's speed, but I can tell that
a 698MB file took me 13 minutes to transfer from the thing to my
HD!!!
Oh, please Cc any replies to my email, since I don't currently subscribe to the list!
Thanks a lot for any help.
Roberto.
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