Graças à resposta com o RMB (ReMoveable Bit), consegui encontrar uma solução descrita em este site (Seção: Na unidade flash, somente a primeira partição funciona). Basicamente, há um Hitachi Driver disponível, que filtra o RMB em nível de driver, que só precisa ser um pouco modificado para funcionar com basicamente todos os USB-Stick. Tudo o que você precisa fazer é adicionar o "ID da instância do dispositivo" ao driver e usar esse driver.
Aqui está o trecho basicamente importante do site de Uwe Schieber:
A filter driver for removing the RMB has been made by Hitachi for
their Microdrives (Compatct Flash cards with a mini harddrive):
xpfildrvr1224_320.zip It is 32 bits only, so it will not work on x64
editions of Windows.
By modifying the included INF file the filter driver can be used with
any other 'removable' drive. For the device detection there are the
lines in section [cfadisk_device]:
[cfadisk_device] %Microdrive_devdesc% =
cfadisk_install,IDE\DiskIBM-DSCM-11000__________________________SC2IC801
IDE\DiskIBM-DSCM-11000__________________________ is the
device ID of one of the supported Microdrives. In analogy to these
lines we add one line for each 'removable' USB drive we want to turn
into a USB hard drive. The ID is found in the Windows device
management: Expand 'Disk drives', right click your USB drive, select
Properties. On the tab "Details" under XP the item "Device instance
ID" is already selected. Click on the ID in the List and press Ctrl+C,
this copies the ID into the Windows Clipboard and can be pasted
somewhere else with Ctrl+V. XP up to SP1 shows the tab "Details" only
when the environment variable DEVMGR_SHOW_DETAILS=1 is set:
DevMgr_Show_1.reg download and doubleclick the file, then relogon to
take effect.
Sample: USBSTOR\DISK&VEN_LEXAR&PROD_JUMPDRIVE&REV_1.30\K326441127040&0
We need the fat part:
[cfadisk_device] %Microdrive_devdesc% =
cfadisk_install,USBSTOR\DISK&VEN_LEXAR&PROD_JUMPDRIVE&REV_1.30
Or much more simple the universal way for any USB disk:
%Microdrive_devdesc% = cfadisk_install,USBSTOR\GenDisk
In the last line of the INF file we change "Hitachi Microdrive" into
something nice as "RemovableToFixed".
In the device manager again right-click the USB drive, "Update
driver...", then "No, not this time" -> Next -> "Install from a list
or..." -> Next -> "Don't search." -> Next -> "Have Disk" -> browse to
the INF file here. Now "RemovableToFixed" should be in the list ->
Next -> Confirm the two warnings -> Finish. Now the drive is
redetected, actually as USB hard drive. The drive can be partitioned,
the policy "Optimize for performance" indeed activates a write cache
on FAT formatted drives and Windows will create the beloved folder
"System Volume Information"... My tries to automat the installtion by
means of Microsoft DEVCON did not succeed.
The filter driver can be removed by deleting the drive in the Windows
Device Manager. After reattaching the drive its drivers are installed
again, but not the filter driver.
%Microdrive_devdesc% = cfadisk_install,USBSTOR\GenDisk
