On a parallel interface such as PCI, no transitions occur on the interface until data needs to be sent. PCI Express has “active-state” power management, which lowers power consumption when the bus is not active (that is, no data is being sent between components or peripherals). Turning this from “Moderate” to “Off” resolved the issue and I no longer get these frequent hangs.įrom an article I found that discussed this: What this actually changed that was critical to this condition was modifying PCI Express > Link State Power Management > Off What finally resolved this for me – was changing the power management settings, from Balanced to High Performance. Reset to device, \Device\RaidPort0, was issued. When the hang occurred – you would see the following in the system event log: Some only experience this with SSD’s installed, and this system does have three of them.
There are all sorts of recommendation such as enabling hot swap options in the BIOS for AHCI controlled disks, changing from the Windows driver for the intel storage controller to the Intel branded RST drivers. I read several articles on the web, mostly pertaining to Windows 8. All the VM’s running on iSCSI disks would also just hang until this self corrected. However, all the other servers that depend on this server for an iSCSI connection to storage, would also hang up or throw errors caused by not being able to reach the storage.
The problem, is that several times an hour, the entire system would hang, for 20-30 seconds. Primarily, I use this machine as my iSCSI server to host disks for other servers in my lab. This machine uses an Intel storage controller and has an addition Dell SAS/SATA controller. The system is a Dell Precision 690 Workstation, with dual Xeon CPU’s, and has the Hyper-V role installed. One of my Server 2012 machines kept hanging, and it was more than annoying.
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