From owner-freebsd-stable@FreeBSD.ORG  Wed Feb 22 07:00:28 2012
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From: Erich Dollansky <erich@alogreentechnologies.com>
Organization: ALO Green Technologies Pte Ltd
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Date: Wed, 22 Feb 2012 13:34:36 +0700
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X-Mailman-Approved-At: Wed, 22 Feb 2012 12:04:23 +0000
Subject: random problem with 8.3 from yesterday
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Hi,

I got a new thumb drive which was FAT formatted. I use this script to change this:

!/bin/tcsh
#
# This script format a thumb drive connected to USB as da0.
#
printf "You have to run this script as 'root' to succeed.\n"
printf "Warning this script will delete all your data from /dev/da0. Continue? > "
set Eingabe = $<
if ("$Eingabe" == "y") then
   printf "\nDeleting the device "
   dd if=/dev/zero of=/dev/da0 bs=1k count=1
   printf "\nWriting the BSD label "
   bsdlabel -Bw da0 auto
   printf "\nEditing the BSD label "
   bsdlabel -e da0
   newfs /dev/da0a
   printf "\nThe device /dev/da0 was formated to be used with FreeBSD.\n"
else
   printf "\nScript aborted!\n"
endif

I then call manually

tunefs -L NewDeviceName /dev/da0a

Either this call or the mount command does not work randomly.

When I then try to mount the device on /dev/da0a it does not work always.

I do not know what this causes, I am only randomly able to reproduce it.

It might be affected by removing the device or keeping it plugged in.

uname says:

FreeBSD AMD620.ovitrap.com 8.3-PRERELEASE FreeBSD 8.3-PRERELEASE #28: Tue Feb 21 17:15:07 WIT 2012     erich@AMD620.ovitrap.com:/usr/obj/usr/src/sys/AsusAMD620  amd64

dmesg says:

ugen1.2: <vendor 0x1005> at usbus1
umass0: <vendor 0x1005 USB FLASH DRIVE, class 0/0, rev 2.00/1.00, addr 2> on usbus1
umass0:  SCSI over Bulk-Only; quirks = 0x4001
umass0:2:0:-1: Attached to scbus2
da0 at umass-sim0 bus 0 scbus2 target 0 lun 0
da0: < USB FLASH DRIVE PMAP> Removable Direct Access SCSI-0 device 
da0: 40.000MB/s transfers
da0: 15272MB (31277056 512 byte sectors: 255H 63S/T 1946C)

It is not an urgent problem.

Erich