Large msdosfs disk will not mount on RELENG_6

[Richard Coleman]

I just bought a large external hard drive for home backups (500g Western Digital My Book).  When I 
plug it in to my machine (RELENG_6 from about a week ago), the system sees the device just fine:

Nov 26 22:03:21 neptune kernel: umass0: Western Digital External HDD, rev 2.00/1.06, addr 2
Nov 26 22:03:21 neptune kernel: uhid1: Western Digital External HDD, rev 2.00/1.06, addr 2, iclass 8/6
Nov 26 22:03:21 neptune kernel: da0 at umass-sim0 bus 0 target 0 lun 0
Nov 26 22:03:21 neptune kernel: da0: <WD 5000YS External 106a> Fixed Direct Access SCSI-4 device
Nov 26 22:03:21 neptune kernel: da0: 40.000MB/s transfers
Nov 26 22:03:21 neptune kernel: da0: 476940MB (976773168 512 byte sectors: 255H 63S/T 60801C)


But when I try to mount the drive (mount -t msdos /dev/da0 /mnt), the system gives the following error:

Nov 26 22:06:41 neptune kernel: mountmsdosfs(): disk too big, sorry

I was surprised to see a file system limitation on FreeBSD that Windows does not have.  I will 
probably reformat the system to ufs2, but thought I would mention this error message.  I'm sure 
these drives will become increasingly common.

Richard Coleman
rcoleman at criticalmagic.com