Q: For USB, there used to be bugs with the USB Storage Class Driver, where
some usual brand names of USB flash key don't work. Is it still the case?
Also, it used to take a long time for USB flash key to appear on windows
explorer for many USB flash key.
A: With respect to the first question, this is still the case. The driver
isn't robust enough to deal with general command set and timing disparities
across the whole gamut devices. To partially mitigate the timing issues, we'
ve exposed all of the timing parameters associated with the driver under the
following registry keys:
[HKEY_LOCAL_MACHINE\Drivers\USB\ClientDrivers\Mass_Storage_Class\2]
[HKEY_LOCAL_MACHINE\Drivers\USB\ClientDrivers\Mass_Storage_Class\6]
We've found that mucking with the UnitAttnRepeat registry value can solve
some of the timing issues associated with large keys. There's a note in
common.reg that says that this value should be reduced from 10 (0xA) to 1
for large USB keys.