Windows 2008 and Hal

NTFSD
1

Does Windows Server 2008 still install a single-user or multi-user HAL based
on the number of detected processors, or is that ancient history? Does it
always installa multi-processor HAL now? Thanks.

2

I think that the UP kernels and HALs are gone from Vista up.

–
Maxim S. Shatskih
Windows DDK MVP
xxxxx@storagecraft.com
http://www.storagecraft.com

“Neil Weicher” wrote in message news:xxxxx@ntfsd…
> Does Windows Server 2008 still install a single-user or multi-user HAL based
> on the number of detected processors, or is that ancient history? Does it
> always installa multi-processor HAL now? Thanks.
>
>
>

3

Windows has been MP only since Vista shipped. The HAL is still selected
during installation, but there is no uni-processor HAL variant anymore.

Tony
OSR

4

Thanks - thats what I figured, but good to have confirmation.

“Tony Mason” wrote in message news:xxxxx@ntfsd…
Windows has been MP only since Vista shipped. The HAL is still selected
during installation, but there is no uni-processor HAL variant anymore.

Tony
OSR

5

Tony,

One of the classic problems in Windows was that if you took a hard drive
from machine A and plugged it into machine B (with a different motherboard,
but otherwise compatible with the original machine, that is, not 64-to-32
bit or other weird attempts), Windows might or might not boot and might or
might not work. I had heard that Vista got around this by selecting a HAL
and/or Kernel at boot time, but never checked up on this rumor. I gather
this rumor is false.
joe

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Tony Mason
Sent: Tuesday, July 28, 2009 8:40 PM
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] Windows 2008 and Hal

Windows has been MP only since Vista shipped. The HAL is still selected
during installation, but there is no uni-processor HAL variant anymore.

Tony
OSR

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6

> might not work. I had heard that Vista got around this by selecting a HAL

and/or Kernel at boot time, but never checked up on this rumor. I gather
this rumor is false.

False.

This is not a HAL issue - the same ACPI SMP APIC HAL is used for nearly all modern machines.

This is the boot disk controller’s issue, which is rather hard to solve. Video can degrade automatically to VGA, so it is not a major issue here.

–
Maxim S. Shatskih
Windows DDK MVP
xxxxx@storagecraft.com
http://www.storagecraft.com

7

This is not enabled by default (IIRC), but you can flip it on via bcdedit.exe /set {current} detecthal yes

  • S

-----Original Message-----
From: Joseph M. Newcomer
Sent: Wednesday, July 29, 2009 08:26
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] Windows 2008 and Hal

Tony,

One of the classic problems in Windows was that if you took a hard drive
from machine A and plugged it into machine B (with a different motherboard,
but otherwise compatible with the original machine, that is, not 64-to-32
bit or other weird attempts), Windows might or might not boot and might or
might not work. I had heard that Vista got around this by selecting a HAL
and/or Kernel at boot time, but never checked up on this rumor. I gather
this rumor is false.
joe

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Tony Mason
Sent: Tuesday, July 28, 2009 8:40 PM
To: Windows File Systems Devs Interest List
Subject: RE: [ntfsd] Windows 2008 and Hal

Windows has been MP only since Vista shipped. The HAL is still selected
during installation, but there is no uni-processor HAL variant anymore.

Tony
OSR

—
NTFSD is sponsored by OSR

For our schedule of debugging and file system seminars
(including our new fs mini-filter seminar) visit:
http://www.osr.com/seminars

To unsubscribe, visit the List Server section of OSR Online at
http://www.osronline.com/page.cfm?name=ListServer

–
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.

—
NTFSD is sponsored by OSR

For our schedule of debugging and file system seminars
(including our new fs mini-filter seminar) visit:
http://www.osr.com/seminars

To unsubscribe, visit the List Server section of OSR Online at http://www.osronline.com/page.cfm?name=ListServer