USB Flash drive problem with 9.0

[J.J. Day]

I am upgrading a FreeBSD server and have encountered a problem with 
mounting a USB flash drive. The system was on 6.3 and I upgraded to 9.0 
using CVS repositories. The flash drive worked properly at all steps 
throughout the upgrade. However, after the OS upgrade was complete, I 
made a mistake and destroyed some of the server application.

So, I set the 
upgraded drive aside, copied the original source drive to a different spare, and 
repeated the upgrade process taking care to verify the functioning of 
the applications during the process. When I finished the second time, everything worked properly except for mounting the flash drive.

it appears that something changed with the OS code that reads the drive firmware between the first time I ran cvsup on (about) the 9th and the second time I ran it about the 18th.



This is the output from the first upgrade (3/11/2012) when the drive is inserted:


	
	ugen4.2: <HP> at usbus4
umass0: <HP v165w, class 0/0, rev 2.00/32.76, addr 2> on usbus4
umass0:  SCSI over Bulk-Only; quirks = 0x0100
umass0:2:0:-1: Attached to scbus2
da0 at umass-sim0 bus 0 scbus2 target 0 lun 0
da0: <hp v165w 3276> Removable Direct Access SCSI-4 device 
da0: 40.000MB/s transfers
da0: 30960MB (63406080 512 byte sectors: 255H 63S/T 3946C)
And diskinfo output:


	
	da0
	512         	# sectorsize
	32463912960 	# mediasize in bytes (30G)
	63406080    	# mediasize in sectors
	0           	# stripesize
	0           	# stripeoffset
	3946        	# Cylinders according to firmware.
	255         	# Heads according to firmware.
	63          	# Sectors according to firmware.
	AA22064F00000035	# Disk ident.
This is the output from the second upgrade (3/18/2012) when the drive is inserted:


	
	ugen4.2: <HP> at usbus4
umass0: <HP v165w, class 0/0, rev 2.00/32.76, addr 2> on usbus4
umass0:  SCSI over Bulk-Only; quirks = 0x0100
umass0:2:0:-1: Attached to scbus2
da0 at umass-sim0 bus 0 scbus2 target 0 lun 0
da0: <hp v165w 3276> Removable Direct Access SCSI-4 device 
da0: 40.000MB/s transfers
da0: 17454747090944MB (71776119061217281 512 byte sectors: 64H 32S/T 0C)
And diskinfo shows:


	
	da0
	512         	# sectorsize
	-144115188075855360	# mediasize in bytes ()
	-281474976710655	# mediasize in sectors
	0           	# stripesize
	0           	# stripeoffset
	-137438953471	# Cylinders according to firmware.
	64          	# Heads according to firmware.
	32          	# Sectors according to firmware.
	AA22064F00000035	# Disk ident.
Since the size information is incorrect, the /dev/da0s1 device is not created and the drive cannot be mounted. The problem only happens with a large drive. When I use a 4GB or 8GB drive, everything works correctly.

If there is any information that I can submit that can assist in solving the problem please let me know.

Thanks,

JJ