I have a USB compact flash reader-writer which is normally connected to
my computer all the time but rarely contains a compact flash card.  Here
is a snippet from a verbose dmesg with FreeBSD 9.0-RC3:


ugen0.5: <vendor 0x05e3> at usbus0
umass0: <vendor 0x05e3 USB TO IDE, class 0/0, rev 2.00/0.32, addr 5> on usbus0
umass0:  SCSI over Bulk-Only; quirks = 0x4101
umass0:2:0:-1: Attached to scbus2
(probe0:umass-sim0:0:0:0): SCSI status error
(probe0:umass-sim0:0:0:0): INQUIRY. CDB: 12 1 0 0 ff 0
(probe0:umass-sim0:0:0:0): CAM status: SCSI Status Error
(probe0:umass-sim0:0:0:0): SCSI status: Check Condition
(probe0:umass-sim0:0:0:0): SCSI sense: NOT READY asc:3a,0 (Medium not present)
(probe0:umass-sim0:0:0:0): Error 6, Unretryable error
(probe0:umass-sim0:0:0:0): Down reving Protocol Version from 2 to 0?
...
(probe0:umass-sim0:0:0:0): AutoSense failed
(probe0:umass-sim0:0:0:0): Error 5, Unretryable error
GEOM: new disk da0
pass2 at umass-sim0 bus 0 scbus2 target 0 lun 0
pass2: <Generic STORAGE DEVICE 1.00> Removable Direct Access SCSI-0 device
pass2: 1.000MB/s transfers
...
(da0:umass-sim0:0:0:0): Request completed with CAM_REQ_CMP_ERR
(da0:umass-sim0:0:0:0): Retrying command
(da0:umass-sim0:0:0:0): Request completed with CAM_REQ_CMP_ERR
(da0:umass-sim0:0:0:0): Retrying command
(da0:umass-sim0:0:0:0): Request completed with CAM_REQ_CMP_ERR
(da0:umass-sim0:0:0:0): Retrying command
(da0:umass-sim0:0:0:0): Request completed with CAM_REQ_CMP_ERR
(da0:umass-sim0:0:0:0): Retrying command
(da0:umass-sim0:0:0:0): Request completed with CAM_REQ_CMP_ERR
(da0:umass-sim0:0:0:0): Error 5, Retries exhausted
(da0:umass-sim0:0:0:0): got CAM status 0x4
(da0:umass-sim0:0:0:0): fatal error, failed to attach to device
(da0:umass-sim0:0:0:0): lost device - 0 outstanding
(da0:umass-sim0:0:0:0): Request completed with CAM_REQ_CMP_ERR
(da0:umass-sim0:0:0:0): Error 5, Retries exhausted
(da0:umass-sim0:0:0:0): removing device entry
Opened disk da0 -> 5


Everything works normally, but the above events take about half a
minute and bring the booting-up procedure to a halt while the
retries finish.  Is there a umass quirk I could enable to speed up
whatever is happening here?  usbconfig -d 0.5 dump_device_desc says:

ugen0.5: <USB TO IDE vendor 0x05e3> at usbus0, cfg=0 md=HOST spd=FULL (12Mbps) pwr=ON

  bLength = 0x0012
  bDescriptorType = 0x0001
  bcdUSB = 0x0200
  bDeviceClass = 0x0000
  bDeviceSubClass = 0x0000
  bDeviceProtocol = 0x0000
  bMaxPacketSize0 = 0x0040
  idVendor = 0x05e3
  idProduct = 0x0703
  bcdDevice = 0x0032
  iManufacturer = 0x0000  <no string>
  iProduct = 0x0001  <retrieving string failed>
  iSerialNumber = 0x0000  <no string>
  bNumConfigurations = 0x0001

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