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The SOS partition is not formatted or given a hard drive letter. It does not have a file system and is not
accessible through normal means.
The HP Backup and Recovery partition is located in between the COS partition and the SOS partition.
Figure 7 HP Compaq dc7700p and dc7800p hard drive layout
Known Limitations
• Intel vPro technology currently supports only a single VA. You will need to select the right VA to suit
your needs.
• VA 2.6 is available at time of launch of the HP Compaq dc7800p Business PC but will only support
Windows XP as the COS. There is no Vista support for VA 2.6.
• VAs do not support RAID configurations at this time.
• VAs do not support more than two processor cores at this time. Therefore, quad core processors such
as the Intel Q6xxx are not supported.
• VAs do not support AMT 1.0. The system must be in AMT 2.x or AMT 3.0 mode.
• VAs do not support any other network cards besides the onboard Intel 82566DM network controller.
• Installation of a VA to a system with multiple hard drives might encounter complications. This is due to
the Windows XP plug n’ play (PnP) algorithms using an in-place reorder mechanism for PnP enumera-
tion.
More details on this issue can be found in the Microsoft Knowledge Base Article at: http://sup-
port.microsoft.com/kb/825668/en-us
To work around this issue, the IDE-R controller in Device Manager must be disabled and the system reboo-
ted before installing the VA. Once this is done, Windows XP will only see one IDE controller and enumer-
ate the hard drives properly. The IDE-R controller appears as a standard dual channel PCI IDE controller.
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