Unfortunately, While trying to fix some windows issue i made some bad decisions by rebuild the MBR and use last-known configuration which made the disk inaccessible as below:
Info: The boot selection failed because a required device is inaccessible
I plugged out the HDD to another PC using Sata to USB but it shows the disk unformatted (RAW), i used EETech CD to remove EE but it takes forever it shows that it needs like 8000 Mins.
Is there anyway to recover that data which is so critical ?
If you're using EETech standalone, it will take a long time to decrypt the disk.
To speed things up, you could use the WinPE version of EETech - that's around 40x faster, in fact it's as fast as the original encryption (since it's running under windows etc).
Now you've started the process though, it's probably best to let it continue - 8000 minutes is about 5 days.