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I am working with a computer system that acquires data from a digitizer card. When the computer sits idle for 1 hour or more, and I begin data acquisition, I receive an error relating to not acquiring the data quick enough. I simultaneously hear the hard drives begin chattering. I know from past investigations, that the software that controls data acquisition is sensitive to high (long) write latency. After receiving the error, I try acquiring again and there is no issue.
I suspect that the storage system is being put into a low power state or idle state. Perhaps the heads are being parked. I have tried the following:
- I have set the hard drives to never spin down through the Windows 7, Control Panel, Power Options menu.
- I have set AHCI Link Power Management (LPM) to "Active" which to my understanding means neither host initiated or device initiated power management is allowed.
Neither of these have improved the situation. How can I confirm that the issue lies in the storage system?
The system has the following specs:
Core i7 7800X
64GB RAM
2x 240GB SSD Corsair Neutron XTI SSD (RAID 1)
4x 4TB Western Digital WD4002FYYZ (RAID 10)
ASUS ROG Strix X299-E GAMING
Using the Intel RAID Controller on the motherboard
Nikesh
Posted 2019-04-17T14:00:04.970
Reputation: 1