Re: 3TB device that shows up as two devices

[Thomas Klausner <wiz%NetBSD.org@localhost>]

On Tue, Aug 21, 2012 at 10:35:19AM +0200, Thomas Klausner wrote:
> On request, Verbatim will send you "Verbatim Mode Change Tool.exe", a
> PE32 executable for MS Windows (GUI) Intel 80386 32-bit, which
> supposedly switches the device to offer one partition. Now I'll just
> have to find a computer where I can execute that...

When executing this on XP, you only get the options of two devices:
umass2: at uhub7 port 3 (addr 4) disconnected
umass2 at uhub7 port 3 configuration 1 interface 0
umass2: Verbatim USB 3.0 Desktop HD, rev 2.10/0.01, addr 4
umass2: using SCSI over Bulk-Only
scsibus2 at umass2: 2 targets, 2 luns per target
sd5 at scsibus2 target 0 lun 0: <ST3000DM, 001-9YN166, CC4B> disk fixed
sd5: fabricating a geometry
sd5: 2047 GB, 2097151 cyl, 64 head, 32 sec, 512 bytes/sect x 4294965248 sectors
sd5: fabricating a geometry
sd6 at scsibus2 target 0 lun 1: <ST3000DM, 001-9YN166, CC4B> disk fixed
sd6: fabricating a geometry
sd6: 746 GB, 764437 cyl, 64 head, 32 sec, 512 bytes/sect x 1565567920 sectors
sd6: fabricating a geometry


or emulation mode, where the USB-to-SATA bridge translates the disk to
appear as 4K sector size:
umass2 at uhub7 port 3 configuration 1 interface 0
umass2: Verbatim USB 3.0 Desktop HD, rev 2.10/0.01, addr 4
umass2: using SCSI over Bulk-Only
scsibus2 at umass2: 2 targets, 1 lun per target
sd5 at scsibus2 target 0 lun 0: <ST3000DM, 001-9YN166, CC4B> disk fixed
sd5: fabricating a geometry
sd5: 2794 GB, 357698 cyl, 64 head, 32 sec, 4096 bytes/sect x 732566646 sectors
sd5: fabricating a geometry


When running this on 7, you can choose an additional option which
passes the device through directly. Afterwards, it shows up in dmesg
as:

sd4 at scsibus1 target 0 lun 0: <ST3000DM, 001-9YN166, CC4B> disk fixed
sd4: fabricating a geometry
sd4: 2794 GB, 2861588 cyl, 64 head, 32 sec, 512 bytes/sect x 5860533168 sectors
sd4: fabricating a geometry
sd4: mbr partition exceeds disk size
sd4: GPT GUID: 1f4c5b0b-f406-46dc-afa5-8d1b5fd9ee11
dk9 at sd4: Microsoft reserved partition
dk9: 262144 blocks at 34, type: 
dk10 at sd4: Basic data partition
dk10: 5860270957 blocks at 262178, type: 

Whatever the reserved partition is :)
 Thomas