What happens when more than 26 drives are present?

[Uwe Sieber]

Install the USBDLM service as described on my page or in the
help file. Go to the folder where you installed it to, create
a new USBDLM.INI.

Enter this:

[DriveLetters1]
Letter1=C:\FlashDrives\Drive


Create the folder C:\FlashDrives
C: must be NTFS formatted.


From now on, if you attach an USB drive it's mounted to
the folder C:\FlashDrives\Drive. The folder 'Drive' is
created by the USBDLM service. If you attach a second
one then USBDLM creates Drive_1, then Drive_2, up to
Drive_99.
The folders stay when the drives are removed. If you want
USBDLM to remove a folder on removal of the drive, add a
setting to the USBDLM.INI:

[Settings]
DeleteMountPointsOnRemoval=1


Mounting into NTFS folders brings some drawbacks, read the
USBDLM_E.CHM help file for more information.



Uwe




Talal Itani wrote:
>
> I looked at your page regarding USB drive manager, but I was unable to
> understand.
>
> Thanks
>
>
>> Normal software does not accept this, but if you write
>> your own Win32 application this would work.
>>
>>
>> With a 3rd party software as my USB drive letter manager
>> you could let mount new drives into NTFS folders. Then
>> the number of drives is limited by the system ressources
>> only.
>> http://www.uwe-sieber.de/usbdlm_e.html
>>
>>
>> Greetings from Germany
>>
>> Uwe
>
>

 

[Leythos]

In article <OG8bQfszHHA.3788@TK2MSFTNGP02.phx.gbl>, birelan@yahoo.com
says...
>
>
> Leythos wrote:
>
> > In article <#LRkr$rzHHA.1100@TK2MSFTNGP06.phx.gbl>, birelan@yahoo.com
> > says...
> >
> >>Let see, while IDE only handles 8, you can put 15 SCSI drives on a
> >>single card, heck, 2 SCSI cards and you have 30 already. Then there is
> >>the USB option. That was pretty easy. And what prevents the user from
> >>multiple power supplies? There are cases outfitted with dual PSU's so
> >>that doesn't appear to be an issue either.
> >
> >
> > And there are external drive cage arrays. We have one server setup with
> > 12 IDE drives using a two Promise SX6000 RAID controllers, works fine,
> > allows hot swap....
> >
>
> With 12 IDE drives, how are they accessed? The IDE spec calls out 4
> channels with 2 drives per channel. Or is the external unit handling it
> and presenting 2 drives as a single unit?

The drives are setup into 2 arrays of 6 drives each. The sx6000 card
controls everything, RAID-5, and 128MB Cache on the card. Can even hot
swap them and rebuild the array without having to take the server down.


--

Leythos
- Igitur qui desiderat pacem, praeparet bellum.
- Calling an illegal alien an "undocumented worker" is like calling a
drug dealer an "unlicensed pharmacist"
spam999free@rrohio.com (remove 999 for proper email address)

 

[Uwe Sieber]

Talal Itani wrote:
>> If there is no drive letter availlable then a new drive
>> just does not get one. As any other drive it is then
>> still accessible thru its volume name, something like
>> \\?\Volume{2525d0b8-01de-11dc-b4ef-000102b35cc3}\
>> For instance the file TEST.TXT in the root folder of
>> the drive could be accessed thru
>> \\?\Volume{2525d0b8-01de-11dc-b4ef-000102b35cc3}\TEST.TXT
>>
>
>
> Thanks again. How can I find the volume name for a drive? When I go to
> drive properties, the name is what the user assigned.
>

Use a SetupDi enumeration with GUID_DEVINTERFACE_VOLUME.
For each volume call GetVolumeNameForVolumeMountPoint
with the device path. With the volume name you can
do further tests to find your USB drives.


Uwe

 

[Bob I]

Leythos wrote:

> In article <OG8bQfszHHA.3788@TK2MSFTNGP02.phx.gbl>, birelan@yahoo.com
> says...
>
>>
>>Leythos wrote:
>>
>>
>>>In article <#LRkr$rzHHA.1100@TK2MSFTNGP06.phx.gbl>, birelan@yahoo.com
>>>says...
>>>
>>>
>>>>Let see, while IDE only handles 8, you can put 15 SCSI drives on a
>>>>single card, heck, 2 SCSI cards and you have 30 already. Then there is
>>>>the USB option. That was pretty easy. And what prevents the user from
>>>>multiple power supplies? There are cases outfitted with dual PSU's so
>>>>that doesn't appear to be an issue either.
>>>
>>>
>>>And there are external drive cage arrays. We have one server setup with
>>>12 IDE drives using a two Promise SX6000 RAID controllers, works fine,
>>>allows hot swap....
>>>
>>
>>With 12 IDE drives, how are they accessed? The IDE spec calls out 4
>>channels with 2 drives per channel. Or is the external unit handling it
>>and presenting 2 drives as a single unit?
>
>
> The drives are setup into 2 arrays of 6 drives each. The sx6000 card
> controls everything, RAID-5, and 128MB Cache on the card. Can even hot
> swap them and rebuild the array without having to take the server down.
>
>

Yes, that last is the real beauty of RAID-5 hardware!