freebsd stable - Jan 2011 - USB Drive not showing up correctly in 8.1 (works in 7.3)

Hello,

I have a USB Drive that was working fine under 7.3, but since updating to 8.1 no
longer
has the correct /dev entries. Under 7.3 it was da0s1, in 8.1 there is now only
da0 and da0a,
which shouldn't exist..

# fdisk /dev/da0 shows:

******* Working on device /dev/da0 *******
parameters extracted from in-core disklabel are:
cylinders=121601 heads=255 sectors/track=63 (16065 blks/cyl)

Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=121601 heads=255 sectors/track=63 (16065 blks/cyl)

Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
    start 63, size 1953520002 (953867 Meg), flag 80 (active)
	beg: cyl 0/ head 1/ sector 1;
	end: cyl 768/ head 254/ sector 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>

Which is correct, and thus should result in a s1 in the dev tree..

# bsdlabel /dev/da0 shows:

# /dev/da0:
8 partitions:
#        size   offset    fstype   [fsize bsize bps/cpg]
  a: 1953525152       16    unused        0     0       
  c: 1953525168        0    unused        0     0         # "raw"
part, don't edit

I don't think there should even be a label at that level..

# gpart list shows:

Geom name: da0
fwheads: 255
fwsectors: 63
last: 1953525167
first: 0
entries: 8
scheme: BSD
Providers:
1. Name: da0a
   Mediasize: 1000204877824 (932G)
   Sectorsize: 512
   Mode: r0w0e0
   rawtype: 0
   length: 1000204877824
   offset: 8192
   type: !0
   index: 1
   end: 1953525167
   start: 16
Consumers:
1. Name: da0
   Mediasize: 1000204886016 (932G)
   Sectorsize: 512
   Mode: r0w0e0

The scheme seems to indicate that geom is not reading the fdisk data?

The dmesg output for the device is:

umass0: <MSC Bulk-Only Transfer> on usbus4
umass0:  SCSI over Bulk-Only; quirks = 0x0000
umass0:0:0:-1: Attached to scbus0
da0 at umass-sim0 bus 0 scbus0 target 0 lun 0
da0: <SAMSUNG HD103UJ > Fixed Direct Access SCSI-2 device 
da0: 40.000MB/s transfers
da0: 953869MB (1953525168 512 byte sectors: 255H 63S/T 121601C)

There is also an error message during boot, which I'm not sure if it's
related but says:

usbd_set_config_index: could not read device status: USB_ERR_SHORT_XFER

Any ideas on how to correct this problem?

Cheers!

Jerahmy Pocott <quakenet1@optusnet.com.au> wrote:
> I have a USB Drive that was working fine under 7.3, but since
> updating to 8.1 no longer has the correct /dev entries. Under
> 7.3 it was da0s1, in 8.1 there is now only da0 and da0a, which
> shouldn't exist...
>
> Any ideas on how to correct this problem?
No, but you're not the first to notice 7.3 vs 8.1 disk-recognition
differences:

http://lists.freebsd.org/pipermail/freebsd-stable/2010-December/060472.html

Adding usb@ in case they have any ideas.