Low umass performance with USB 2.0 ports
João Carlos Mendes Luís
jonny at jonny.eng.br
Thu Sep 1 03:17:25 GMT 2005
Eygene A. Ryabinkin wrote:
>> I had exactly this problem with Kingston Data Traveler II+, and
>>apparently completely solved it by adding a kludge to disallow Cache
>>Syncronization. Try it yourself.
>
> And the kludge is?
It's on my home machine, and I'm travelling now. But it's easy. Look
at /sys/cam/scsi/scsi_da.c, look for the da_quirk_table array, and add
the flag DA_Q_NO_SYNC_CACHE to your pen drive specs.
There are lots of quirks for pen drives there, just copy one of then and
edit the string identifiers.
More information about the freebsd-hackers
mailing list