[gPXE] Why disk not appear in the disk management tool?

Miller, Shao Shao.Miller at yrdsb.edu.on.ca
Mon May 10 09:15:21 EDT 2010

Good day Aldrich,

None of your e-mails mentioned any websites.  Thanks for detailing that you were following a guide at the gPXE website, which must mean:


Is that correct?

If the problem really happens with no internal HDD at all and just from the iSCSI-booted Windows, it could be:
- Because you booted Windows while the original HDD was attached at the same time as the SAN
- Because you have a root-kit installed on your computer

Some actions you can try:
- Report what you find in the UpperFilters and LowerFilters values at the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E967-E325-11CE-BFC1-08002BE10318}\ Registry key.  I would expect no LowerFilters (or maybe hpdiskflt) and one UpperFilters: PartMgr
- You could delete all values inside the HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices\ Registry key and reboot
- You could right-click the disk device in Device Manager, choose Properties, click the Volumes tab, then click the Populate button and report what shows up
- You could use the 'mountvol' command and report what shows up
- You could download BeebleBroxNT[1] partition editor and report the exact details it shows
- You could inspect the Registry key at HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\dmadmin\Parameters\ and report what you find there
- You could use 'diskpart' and then 'list disk' and 'list volume' and report the detail

Hope this helps.

- Shao Miller

[1] http://sourceforge.net/projects/beeblebrox/files/beeblebrox-windows/0.0.2/beeblebrox-0.0.2-win.zip/download

From: KernSafe Technology [mailto:kernsafe at hotmail.com] 
Sent: Monday, May 10, 2010 07:28
To: Miller, Shao
Cc: gpxe at etherboot.org
Subject: RE: [gPXE] Why disk not appear in the disk management tool?

Thank you for your help.
The guide is following gpxe website mentioned previously.
Boot progress:
1, dhcp, Router and My own bootp service
2, tftp, third part standard ftfp server.
3, gpxe, use the standard and complied undionly.kpxe
4, iscsi, used a few type of targets and initiators, are all the same.
5, sanbootconf, download from etherboot.org
the iSCSI targets and initiators I have tested to change other brands (includes microsoft initiator), the problem persist, so I think it is irrelevant to the iSCSI.
The disk parition, I'm sure they are not the same, and even just one disk, it have the problem.
Did other things will cause the problem? bootp or sanbootconf?
> Subject: RE: [gPXE] Why disk not appear in the disk management tool?
> Date: Sun, 9 May 2010 11:33:35 -0400
> From: Shao.Miller at yrdsb.edu.on.ca
> To: kernsafe at hotmail.com
> CC: gpxe at etherboot.org
> Sorry, Aldrich, I mis-spelled your name on this Apple MacBook keyboard,
> which often misses keystrokes. I don't think gPXE is hiding your first
> disk. Other people including myself do not have this problem. - Shao
> -----Original Message-----
> From: Miller, Shao 
> Sent: Sunday, May 09, 2010 11:30
> To: KernSafe Technology
> Cc: gpxe at etherboot.org
> Subject: RE: [gPXE] Why disk not appear in the disk management tool?
> Good day Alrich,
> I repeatedly asked which guide you were following because without a
> guide, you might not be aware that you should not have the original
> source for the SAN image (a local HDD) attached to the same computer.
> Windows cares about a disk signature in the MBR. If two disks are
> attached with the same disk signature in the MBR, this can certainly
> complicate matters. Same thing with your two-SAN connection... Are
> they the same image with the same MBR? Each disk you are using should
> have a different MBR signature.
> - Shao Miller
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