Ok. I finally solved this issue. It was the MSI Gaming App which I installed when I bought a MSI GTX1080. Somehow it was choking the SATA drives. Even when I thought they were running ok there were only benching at around 80 MB/Sec. After I uninstalled the MSI gaming app I am benching at 140...
Update after a long while...
Finally I went to Asus support with this issue and they could not resolve it. They said it was probably a motherboard fault. So I bought an new motherboard (Z170-WS) and swapped out the Z170-Deluxe. Unfortunately I am still getting this issue.
I am thinking now that...
I switched the 2 hard disks to the Asmedia SATA ports. I still have the same problem with very slow disks on a cold boot. Conclusion. It's nothing to do with the Intel/Asmedia SATA disk controller.
I am going to open a support case with Asus next.
I'm having problems getting my graphics card out so I can move the disks onto the Asmedia SATA ports. In the meantime...
Here is a screen-shot of a HD Tune benchmark after a cold boot (powering the PC on from off:
https://dl.dropboxusercontent.com/u/20683608/SlowHD.png
Here is a screen-shot...
I have moved the disks to different SATA ports. I now have:
Plextor PCI Express disk - mounts as drive H:
SATA port 1: Hitachi 4TB Hard disk - mounts as D:
SATA port 2: Hitachi 2TB Hard disk - mounts as E:
SATA port 3: Intel SSD 240 GB - mounts as C:
SATA port 4: Empty
SATA port 5: Empty
SATA...
To clarify a few of the points above.
I am using the default microsoft Windows SATA drivers. I previously un-installed the Intel AHCI drivers. It made no difference to the issue.
I am running the drives in AHCI mode. I am not using RAID.
I have the motherboard M2 and SATA express SATA mode...
Hi,
I have a problem with the SATA hard disk speed on my PC.
When I first boot of my PC every day (cold boot), my SATA hard disks run very slowly. They run at 10% of their normal speed. If I reboot the PC again, the disks run at the correct speed. Every day I have to boot my PC twice to fix...
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