Thread: Bad USB transfer performance.
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wmhobbes is offline wmhobbes
2006-01-26 , 22:40
Posts: 6 | Thanked: 0 times | Joined on Jan 2006 @ Northern Italy
#3
Originally Posted by putkowski
MMC cards' speeds can vary widely. My Kingston card is noticeable faster than the "stock" 64MB card.
Absolutely agree, but it seems the speed is negotiated at 12Mbps with the host:

Code:
T:  Bus=03 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  3 Spd=12  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=0421 ProdID=0431 Rev= 3.08
S:  Manufacturer=Nokia
S:  Product=Nokia 770
See the Spd=12?
"high speed" devices show Spd=480 there:

Code:
T:  Bus=04 Lev=02 Prnt=06 Port=00 Cnt=01 Dev#=  8 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=0ea0 ProdID=2168 Rev= 2.00
S:  Manufacturer=USB
S:  Product=Flash Disk
weird...