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From: Hans Petter Selasky <hselasky@c2i.net>
To: Bartosz Fabianowski <freebsd@chillt.de>
Date: Sat, 31 Dec 2011 13:31:08 +0100
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Cc: freebsd-usb@freebsd.org
Subject: Re: umass regression
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On Friday 30 December 2011 23:23:16 Bartosz Fabianowski wrote:
> With USB_DEBUG, I see that da0 has the NO_SYNCHRONIZE_CACHE set. But I
> still have no idea where the second umass device is gone that used to
> show up in 8-STABLE :(. Is there any other debug option I could enable
> to chase after that? I see no trace of another umass or even a ugen device.
> 
> - Bartosz
> 
> Here is the output I get now:
> 
> ugen1.3: <vendor 0x091e> at usbus1
> umass0: <vendor 0x091e product 0x23c0, class 0/0, rev 1.10/5.09, addr 3>
> on usbus1
> umass0:  SCSI over Bulk-Only; quirks = 0x4000
> umass0:3:0:-1: Attached to scbus3
> da0 at umass-sim0 bus 0 scbus3 target 0 lun 0
> da0: <Garmin GARMIN Flash 1.00> Removable Direct Access SCSI-5 device
> da0: 1.000MB/s transfers
> da0: 934MB (1912832 512 byte sectors: 64H 32S/T 934C)

Try to set the no synchronize cache quirk. Then reattach your device. It might 
be the msctest which is causing your problem!

usbconfig -h | grep quirk

--HPS