Large msdosfs disk will not mount on RELENG_6

[Richard Coleman]

Christian Brueffer wrote:
> On Sun, Nov 26, 2006 at 10:23:14PM -0500, Richard Coleman wrote:
>> 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.
>>
> 
> Please rebuild your kernel with "options MSDOSFS_LARGE" and try again.
> 
> - Christian

Ahh, good to know.  I hadn't seen that one before.  Thanks.

Richard Coleman
rcoleman at criticalmagic.com