Head from yesterday's snapshot fails to mount root

I just tried to install HEAD from the July 16 snapshot. Installation went
fine using all defaults. (I am trying to test whether a problem with resume
is present with HEAD.)

I booted up the system from a USB drive with no problems until it tried to
mount root. It simply sat "Waiting for /dev/da0p2" forever (or more than
the 3 minutes I waited). System is a Lenovo ThinkPad T520 (amd64) that runs
10.2-BETA1 (r285359) without any issues other than the inability to resume/

da0 is an old 120GB USB drive and I can mount and examine it using either
the install system or 10.2-BETA1 system.

This is my first experience with HEAD since the release of 10.0. The boot
looks quite normal and the UMASS and da0 devices show up and look normal.
ugen1.3: <JMicron> at usbus1
umass0: <MSC Bulk-Only Transfer> on usbus1
umass0:  SCSI over Bulk-Only; quirks = 0x4000
umass0:5:0:-1: Attached to scbus5
da0 at umass-sim0 bus 0 scbus5 target 0 lun 0
da0: <WDC WD12 00UE-00KVT0 3K01> Fixed Direct Access SCSI-2 device
da0: Serial Number D578C6060290
da0: 40.000MB/s transfers
da0: 114473MB (234441648 512 byte sectors: 255H 63S/T 14593C)
da0: quirks=0x2<NO_6_BYTE>

Would screen shots of the boot help? (I sure see anything unusual.) Is this
a known issue?

Kevin Oberman, Network Engineer, Retired
E-mail: rkoberman_at_gmail.com
PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683