Hi
I just bought a 'Super Talent Inc.' 64MB flash 'key'. (supposedly USB2.0)
Reads are 'fast enough' but writes are *dire* taking very nearly an *hour* to write 64MB of data.
the data appears to have written ok, just slowly. ...
Strange symptom. 64 MB should take only a few seconds (count on fingers of one hand, no thumbs!) at high speed. The device looks odd because of that embedded hub. Maybe there are some other oddities explaining that.
Do you know where the delays happen? You could enable the usb-storage verbose debug, and watch the output stream by to see where delays pop up.
- Dave
output from /proc/bus/usb/devices shows it has some kind of 'embedded hub' whatever thats used for.
T: Bus=01 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#= 2 Spd=480 MxCh= 1
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=067b ProdID=2515 Rev= 0.01
S: Manufacturer=Super Talent Flash Inc.
S: Product=USB Embedded Hub
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=256ms
T: Bus=01 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 3 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=067b ProdID=2517 Rev= 0.01
S: Manufacturer=Super Talent Flash Inc.
S: Product=USB Mass Storage Device
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=05 Prot=50 Driver=usb-storage
E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
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