Rapid Storage Technology
Intel® RST, RAID
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Replacing Smart Response Technology (SRT) SSD or Target HDD, unknown error fix workaround


I had an annoying problem when I replaced my 8TB target disk with new one and couldn't anymore accelerate it... After a few days tinkering I found a fix for my problem. This is a workaround to fix unknown error (0xa0040002), that can happen when trying to re-enable caching for the new drive.

1st: return SSD back to normal use

2nd: Go to windows storage manager and format disk to be regular disk GPT or MBR primary partition

3rd: Delete Partition

4th: Re-enable SSD caching via Rapid Storage Technology Interface

5th: Your problem should be fixed now.

Confirmed to work with 2nd gen Intel Core processor with Z77 chipset board using RST version 15.9

Message was edited by: markku hyttinen Added error code

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Community Manager

Hello FireFlower,

Thank you for bringing this matter to the Community.

I am pretty sure your steps will help other users viewing this thread.


Amy C.