problem writing to umass device

[Alexander Best]

i have a problem with the following device:

ugen7.2: <Meizu   Electronics> at usbus7
umass0: <Meizu   Electronics MiniPlayer, class 0/0, rev 2.00/1.00, addr 2> on
usbus7
umass0:  SCSI over Bulk-Only; quirks = 0x4400
umass0:7:0:-1: Attached to scbus7
da0 at umass-sim0 bus 0 target 0 lun 0
da0: <  > Removable Direct Access SCSI-2 device
da0: 40.000MB/s transfers
da0: 3864MB (7913472 512 byte sectors: 255H 63S/T 492C)

i haven't used it for quite a while, but it used to work just fine (yes with
usb2). but since then i've updated my kernel a couple of times and now i'm
getting these errors. i can mount the device just fine, but if i try to copy
files onto it i get the following error messages:

Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=54083584,
length=65536)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=54149120,
length=65536)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=54214656,
length=65536)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=54280192,
length=32768)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=54312960,
length=16384)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=54329344,
length=65536)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=54394880,
length=65536)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=54460416,
length=65536)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=54525952,
length=65536)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=54591488,
length=65536)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=54657024,
length=16384)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=512,
length=512)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=24576,
length=4096)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=28672,
length=4096)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=1024000,
length=4096)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=1028096,
length=4096)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=38502400,
length=16384)]error = 5
Jul 28 11:22:07 otaku kernel: g_vfs_done():da0[WRITE(offset=39370752,
length=16384)]error = 5
Jul 28 11:22:07 otaku kernel: fsync: giving up on dirty
Jul 28 11:22:07 otaku kernel: 0xcc0aa6b8: tag msdosfs, type VREG
Jul 28 11:22:07 otaku kernel: usecount 1, writecount 0, refcount 55
mountedhere 0
Jul 28 11:22:07 otaku kernel: flags ()
Jul 28 11:22:07 otaku kernel: v_object 0xc8a81770 ref 0 pages 212
Jul 28 11:22:07 otaku kernel: lock type msdosfs: EXCL by thread 0xcc60a240
(pid 19448)
Jul 28 11:22:07 otaku kernel: #0 0xc05b5ee0 at __lockmgr_args+0xb90
Jul 28 11:22:07 otaku kernel: #1 0xc0647898 at vop_stdlock+0x68
Jul 28 11:22:07 otaku kernel: #2 0xc0781fb5 at VOP_LOCK1_APV+0xb5
Jul 28 11:22:07 otaku kernel: #3 0xc0664008 at _vn_lock+0x78
Jul 28 11:22:07 otaku kernel: #4 0xc0658adb at vget+0xbb
Jul 28 11:22:07 otaku kernel: #5 0xc055d4ca at msdosfs_sync+0x17a
Jul 28 11:22:07 otaku kernel: #6 0xc06520be at dounmount+0x44e
Jul 28 11:22:07 otaku kernel: #7 0xc065262f at unmount+0x2bf
Jul 28 11:22:07 otaku kernel: #8 0xc076eb26 at syscall+0x2a6
Jul 28 11:22:07 otaku kernel: #9 0xc0752ad0 at Xint0x80_syscall+0x20
Jul 28 11:22:07 otaku kernel: startcluster 2230, dircluster 2229, diroffset
96, on dev da0
Jul 28 11:22:40 otaku kernel: g_vfs_done():da0[WRITE(offset=53805056,
length=65536)]error = 5
Jul 28 11:22:40 otaku kernel: g_vfs_done():da0[WRITE(offset=53870592,
length=65536)]error = 5
Jul 28 11:22:40 otaku kernel: g_vfs_done():da0[WRITE(offset=53936128,
length=65536)]error = 5
Jul 28 11:22:40 otaku kernel: g_vfs_done():da0[WRITE(offset=54001664,
length=65536)]error = 5
Jul 28 11:22:40 otaku kernel: g_vfs_done():da0[WRITE(offset=54067200,
length=65536)]error = 5
Jul 28 11:22:40 otaku kernel: g_vfs_done():da0[WRITE(offset=54132736,
length=65536)]error = 5
Jul 28 11:22:40 otaku kernel: g_vfs_done():da0[WRITE(offset=54198272,
length=65536)]error = 5
Jul 28 11:22:40 otaku kernel: g_vfs_done():da0[WRITE(offset=54263808,
length=65536)]error = 5
Jul 28 11:22:40 otaku kernel: g_vfs_done():da0[WRITE(offset=54329344,
length=65536)]error = 5
Jul 28 11:22:40 otaku kernel: g_vfs_done():da0[WRITE(offset=54394880,
length=65536)]error = 5
Jul 28 11:22:40 otaku kernel: g_vfs_done():da0[WRITE(offset=54460416,
length=65536)]error = 5
Jul 28 11:22:40 otaku kernel: g_vfs_done():da0[WRITE(offset=54525952,
length=65536)]error = 5

might the device's ram be broken? this is the result of `dd if=/dev/da0
of=/dev/null`:

dd: /dev/da0: Input/output error
1067+0 records in
1067+0 records out
546304 bytes transferred in 235.522107 secs (2320 bytes/sec)

i attached the device to a windows xp box and ran scandisk. that didn't reveal
any problems however.

cheers.
alex

oh...and i'm running r195923.