<div>
<div class="content wysiwyg-content">
1) Are there special HALs for virtualized systems as opposed to the HALs for non-virtualized systems? &nbsp;<br />
<br />
Example: I have a Windows 2000 server running virtualized in a Windows 2008 HyperV session. &nbsp;When I check Computer Device Manager Hardware Computer both the virtualized session and the host system same the same thing - multiprocessor CPU. &nbsp;However when I look at the respective HAL file sizes they are different.<br />
<br />
2) Do HAL's change from OS to OS e.g. the single processor HAL for XP is different than the single processor HAL for Windows 2000 which is in turn different than the one for Windows 2003 and they are all different than the 2008 single processor HAL? &nbsp;<br />
<br />
3 <br />
(a) If there are different HAL's for different OS and different HALs for virtualized and non-virtualized systems what are the rules for deciding which one gets loaded? &nbsp;Back to my example, what HAL would be loaded in a virtualized Windows 2000 server under HyperV? &nbsp;<br />
<br />
(b) If I choose to only see/utilized one CPU in my virtual session even though the system is a quadcore and in theory I could see four CPUS does that mean my virtual session has a single processor HAL as opposed to a multiprocessor HAL?<br />
<br />
<br />

</div>
</div>


1) Are there special HALs for virtualized systems as opposed to the HALs for non-virtualized systems?  

Example: I have a Windows 2000 server running virtualized in a Windows 2008 HyperV session.  When I check Computer Device Manager Hardware Computer both the virtualized session and the host system same the same thing - multiprocessor CPU.  However when I look at the respective HAL file sizes they are different.

2) Do HAL's change from OS to OS e.g. the single processor HAL for XP is different than the single processor HAL for Windows 2000 which is in turn different than the one for Windows 2003 and they are all different than the 2008 single processor HAL?  

3 
(a) If there are different HAL's for different OS and different HALs for virtualized and non-virtualized systems what are the rules for deciding which one gets loaded?  Back to my example, what HAL would be loaded in a virtualized Windows 2000 server under HyperV?  

(b) If I choose to only see/utilized one CPU in my virtual session even though the system is a quadcore and in theory I could see four CPUS does that mean my virtual session has a single processor HAL as opposed to a multiprocessor HAL?




HAL - differences in hyperv, virtual server, non-virtualized systems

Virtualization is the act of creating a virtual (rather than actual) version of something, including (but not limited to) a virtual computer hardware platform, operating system (OS), storage device, or computer network resources. Virtualization is usually the creation of a system that executes separate from the underlying hardware resources, or the creation of an entire desktop for systems located elsewhere, similar to thin clients.

Virtualization

Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. For large systems, the operating system makes sure that different programs and users running at the same time do not interfere with each other. The operating system is also responsible for security, ensuring that unauthorized users do not access the system. Operating systems provide a software platform on top of which other programs, called application programs, can run.

Operating Systems

Hardware includes cell phones and other digital living devices, tablets, computers, servers, peripherals and components, printers and scanners, gaming consoles, networking hardware such as routers, hubs, switches and modems, storage devices and security equipment such as firewalls and other appliances.