mounting WD external USB disk

[Sam Fourman Jr.]

I have access to a WD MyBook, and I also can not get it to work.
the error is the same

da0 at umass-sim0 bus 0 target 0 lun 0
da0: <WD 1600BB External 0108> Fixed Direct Access SCSI-0 device
da0: 40.000MB/s transfers
da0: 152627MB (312581808 512 byte sectors: 255H 63S/T 19457C)
SMP: AP CPU #1 Launched!
SMP: AP CPU #2 Launched!
SMP: AP CPU #3 Launched!
cd0 at ata0 bus 0 target 0 lun 0
cd0: <SONY DVD RW AW-Q170A 1.70> Removable CD-ROM SCSI-0 device
cd0: 66.000MB/s transfers
cd0: Attempt to query device size failed: NOT READY, Medium not present
cd1 at ata0 bus 0 target 1 lun 0
cd1: <SONY CD-RW  CRX230EE 2YS8> Removable CD-ROM SCSI-0 device
cd1: 33.000MB/s transfers
cd1: Attempt to query device size failed: NOT READY, Medium not present
GEOM_LABEL: Label for provider da0s1 is msdosfs/My Book.
Trying to mount root from ufs:/dev/ad4s1a
bridge0: Ethernet address: 52:2a:c4:5a:c0:d0
tap0: Ethernet address: 00:bd:7d:42:00:00
tap0: promiscuous mode enabled
fuse4bsd: version 0.3.9-pre1, FUSE ABI 7.8
pid 1418 (hald), uid 560: exited on signal 11

has anyone ever used a larger mybook on FreeBSD

Sam Fourman Jr.