Solution to Problem: Conflicting fault tolerance for RAID-1 between Microsoft versus Intel.

Conflicting fault tolerance for RAID-1 between Microsoft versus Intel.

Two (2) new (blank) WD 750GB SATA drives were mounted on an HP PC with the Intel ICH9 chipset supporting RAID-0 and RAID-1.
On the first restart ,I pressed F4, then Ctrl+I after the POST, went into the RAID configuration utility, configured both drives as a
RAID-1 paired (mirrored) unit, saved, and rebooted.
On restart I inserted the Windows7 DVD and installed clean Windows 7 Home premium 64-bit.
Everything works perfectly at this point.
To check the RAID, I opened Microsoft's Disk Management utility and saw a single dynamic volume with 698.7GB, but saw "No" being reported under "Fault Tolerance" column.
On advice, I then installed Intel's Storage Matrix Manager program (for the correct chipset), and viewed configuration after Windows restarted.
Intel's software reports two drives in a single RAID dymnamic "Volume0" configuration.
So, I rebooted, pressed F4 then ctrl+I (again) and saw the two disks still pared together as expected.
Why does Microsoft Disk Manager report no fault tolerance when Intel reports that I do? Do I, in fact, have fault tolerance protection or not?

Solutions to the Problem Conflicting fault tolerance for RAID-1 between Microsoft versus Intel.

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Since you report it as wokring perfectly, I would guess that curiosity is eating at your brain.

I have some experience and facility working with hardware but I am far from an expert.
That being said, it is my understanding that this just an apparent discrepancy.
It arises because it is the Intel software, in conjunction with the hardware, that is providing
the RAID services, not Microsoft's disk services.
Therefore, fault tolerance is reported by the software that checks the Intel's software operation and none is reported by the software that checks the MS' operation.
As far as MS' disk services is concerned,
the RAID is treated by it as just one simple disk (partitioning and formatting aside).

I could be wrong.
If so, perhaps someone will be so kind as to provide a better/correct explaination.


In this method we will try to Boot in Safe mode with Networking and see if the error still persists.

  • Search "MSCONFIG" and Open.
  • Click on Boot Tab
  • Tick Safe Boot in Boot Option
  • Select Network.
  • Click Apply and OK.
  • Reboot your System.

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