>Number:         149934
>Category:       usb
>Synopsis:       Transcend JetFlash V85 poor performance
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-usb
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          change-request
>Submitter-Id:   current-users
>Arrival-Date:   Tue Aug 24 11:40:02 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Volodymyr Kostyrko
>Release:        RELENG_8
>Organization:
>Environment:
FreeBSD limbo.lan 8.1-STABLE FreeBSD 8.1-STABLE #0 r211717M: Tue Aug 24 
12:56:24 EEST 2010     arc...@limbo.lan:/usr/obj/usr/src/sys/MINIMAL_8  i386
>Description:
When attaching device kernel reports this:

Aug 21 22:46:15 limbo root: Unknown USB device: vendor 0x058f product 0x6387 
bus uhub3
Aug 21 22:46:15 limbo kernel: umass1: <JetFlash Mass Storage Device, class 0/0, 
rev 2.00/1.00, addr 3> on usbus3
Aug 21 22:46:15 limbo kernel: umass1:  SCSI over Bulk-Only; quirks = 0x0100
Aug 21 22:46:16 limbo kernel: umass1:2:1:-1: Attached to scbus2
Aug 21 22:46:16 limbo kernel: (probe0:umass-sim1:1:0:0): TEST UNIT READY. CDB: 
0 0 0 0 0 0
Aug 21 22:46:16 limbo kernel: (probe0:umass-sim1:1:0:0): CAM status: SCSI 
Status Error
Aug 21 22:46:16 limbo kernel: (probe0:umass-sim1:1:0:0): SCSI status: Check 
Condition
Aug 21 22:46:16 limbo kernel: (probe0:umass-sim1:1:0:0): SCSI sense: UNIT 
ATTENTION asc:28,0 (Not ready to ready change, medium may have changed)
Aug 21 22:46:16 limbo kernel: da4 at umass-sim1 bus 1 scbus2 target 0 lun 0
Aug 21 22:46:16 limbo kernel: da4: <JetFlash TS4GJFV85 8.07> Removable Direct 
Access SCSI-2 device
Aug 21 22:46:16 limbo kernel: da4: 40.000MB/s transfers
Aug 21 22:46:16 limbo kernel: da4: 3900MB (7987200 512 byte sectors: 255H 63S/T 
497C)
Aug 21 22:46:24 limbo kernel: (da4:umass-sim1:1:0:0): SYNCHRONIZE CACHE(10). 
CDB: 35 0 0 0 0 0 0 0 0 0
Aug 21 22:46:24 limbo kernel: (da4:umass-sim1:1:0:0): CAM status: SCSI Status 
Error
Aug 21 22:46:24 limbo kernel: (da4:umass-sim1:1:0:0): SCSI status: Check 
Condition
Aug 21 22:46:24 limbo kernel: (da4:umass-sim1:1:0:0): SCSI sense: ILLEGAL 
REQUEST asc:26,0 (Invalid field in parameter list)

After that any time SYNCHRONIZE CACHE command is issued writing to device stops 
for some time and kernel reports bad command.
>How-To-Repeat:
Attaching the device and trying to work with it should suffice.
>Fix:
Apply the following patch.

Patch attached with submission follows:

Index: sys/dev/usb/quirk/usb_quirk.c
===================================================================
--- sys/dev/usb/quirk/usb_quirk.c       (revision 211717)
+++ sys/dev/usb/quirk/usb_quirk.c       (working copy)
@@ -159,6 +159,9 @@
        USB_QUIRK(ALCOR, AU6390, 0x0000, 0xffff, UQ_MSC_NO_SYNC_CACHE),
        USB_QUIRK(ALCOR, UMCR_9361, 0x0000, 0xffff, UQ_MSC_FORCE_WIRE_BBB,
            UQ_MSC_FORCE_PROTO_SCSI, UQ_MSC_NO_GETMAXLUN),
+       USB_QUIRK(ALCOR, TRANSCEND, 0x0100, 0x0100, UQ_MSC_FORCE_WIRE_BBB,
+           UQ_MSC_FORCE_PROTO_SCSI, UQ_MSC_NO_GETMAXLUN, UQ_MSC_NO_SYNC_CACHE,
+           UQ_MSC_NO_TEST_UNIT_READY),
        USB_QUIRK(ALCOR, TRANSCEND, 0x0142, 0x0142, UQ_MSC_FORCE_WIRE_BBB,
            UQ_MSC_FORCE_PROTO_SCSI, UQ_MSC_NO_GETMAXLUN, UQ_MSC_NO_SYNC_CACHE),
        USB_QUIRK(ALCOR, TRANSCEND, 0x0000, 0xffff, UQ_MSC_FORCE_WIRE_BBB,


>Release-Note:
>Audit-Trail:
>Unformatted:
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