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This describes a particular scenari
bviously it may or may not have relevance to others.
Symptoms
Computer hangs for a (generally short) while but DOES come back to life. Afterwards there is reported in the Event Viewer
Error The device, \Device\Ide\iaStor0, did not respond within the timeout period. With Event ID 9
Cause
I have a mixture of disks and one of them is an old (2006) Western Digital WDC WD2500KS. This disk does not support Advanced Power Management (APM).
However the Intel software installs expecting all drives to be APM compliant and this seems to be the cause of my problem.
see here http://www.intel.com/support/chipsets/imsm/sb/CS-025783.htm
Cure
A new Registry entry to let the Intel driver know that the drive on Port x is not APM compliant. After applying this change I had no hangs for more than a week.
After removing the new registry entry the problem re-oocurred within an hour.
Reg entry - which turns things off on the affected Port
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\iaStor\Parameters\Port4]
"LPM"=dword:00000000
"LPMSTATE"=dword:00000000
"LPMDSTATE"=dword:00000000
"DIPM"=dword:00000000
CrystalDiskInfo will show whether disk support APM or not
IAStorUI -> Manage Disk - will show the Port used by disks
bviously it may or may not have relevance to others.Symptoms
Computer hangs for a (generally short) while but DOES come back to life. Afterwards there is reported in the Event Viewer
Error The device, \Device\Ide\iaStor0, did not respond within the timeout period. With Event ID 9
Cause
I have a mixture of disks and one of them is an old (2006) Western Digital WDC WD2500KS. This disk does not support Advanced Power Management (APM).
However the Intel software installs expecting all drives to be APM compliant and this seems to be the cause of my problem.
see here http://www.intel.com/support/chipsets/imsm/sb/CS-025783.htm
Cure
A new Registry entry to let the Intel driver know that the drive on Port x is not APM compliant. After applying this change I had no hangs for more than a week.
After removing the new registry entry the problem re-oocurred within an hour.
Reg entry - which turns things off on the affected Port
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\iaStor\Parameters\Port4]
"LPM"=dword:00000000
"LPMSTATE"=dword:00000000
"LPMDSTATE"=dword:00000000
"DIPM"=dword:00000000
CrystalDiskInfo will show whether disk support APM or not
IAStorUI -> Manage Disk - will show the Port used by disks