From owner-freebsd-current@FreeBSD.ORG  Thu Apr 21 02:39:07 2005
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From: Randy Bush <randy@psg.com>
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Date: Wed, 20 Apr 2005 16:38:59 -1000
To: FreeBSD Current <freebsd-current@freebsd.org>
Subject: sandisk usb freeze
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running current as of yesterday on a thinkpd t41

picked up a sandisk cruzer 128mb usb disk stick.  it
looks ok from winxp

plug it in, 
the stick's led lights up
syslog sez

    umass0: SanDisk Corporation Cruzer Mini, rev 2.00/1.04, addr 2
    da0 at umass-sim0 bus 0 target 0 lun 0
    da0: <Generic STORAGE DEVICE 1.04> Removable Direct Access SCSI-0 device 
    da0: 40.000MB/s transfers
    da0: 125MB (256000 512 byte sectors: 64H 32S/T 125C)

fdisk da0 either locks up or causes reboot with no disk
flowers

    savecore: no dumps found

any pointers on how to best debug?

randy