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Windows 7: Two drive C volumes?

14 Jul 2011   #11
Zomby88

Windows 7 Ultimate 64Bit
 
 

Reinstall on the ssd again, this time leave the other drives connected. You should get the option to boot to either drive. And each will be the C drive. I`ve done this dozens of times.


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14 Jul 2011   #12
gregrocker

 

It is not preferable to have Windows configure a Dual Boot as it interlocks the HD's requiring major surgery to remove one. This is why we recommend unplugging existing OS HD before installing to a second HD.

Separate HD's booted via the BIOS leaves them independent to come and go as you please.
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14 Jul 2011   #13
Zomby88

Windows 7 Ultimate 64Bit
 
 

But the way I describe is sooooo much easier.
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15 Jul 2011   #14
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by gregrocker View Post
There is a forum's tutorial on how to change to AHCI after install: AHCI : Enable in Windows 7 / Vista

In a dual boot where both must be changed I think I would remove the other HD while I change over the first one, then repeat the same with the other HD set to its native SATA mode to start.

As I've not done this myself, I'd wait for Wolfgang or the tutorial author to sign off on it before proceeding. Also, other than the ability to have modern hotplugging there are no reports I can remember of improved performance.
I am in the same position as Greg - I have never tried that because in my multiboot systems I run my SSDs in IDE mode. I found that the performance advantage with AHCI is minimal and I like to stay out of trouble.

But the way Greg described it should work. Set the BIOS to IDE and boot into the HDD system. There you set the registry to AHCI as described in the linked tutorial. Then you can go back to AHCI in the BIOS. Try that and let us know whether it works.
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15 Jul 2011   #15
Nikitaq

Windows 7 Home 32-bit
 
 

Currently, all the drives are working very well in SATA mode. I'm a little reluctant to change to AHCI if there is no perceptible difference in speed?

I might try it with the SSD and there isn't much on it at the moment and I can afford for it to go wrong.

However - one quick question - can you go back to SATA from AHCI without causing the same BSOD issues?
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15 Jul 2011   #16
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote:
However - one quick question - can you go back to SATA from AHCI without causing the same BSOD issues?
I guess you can if you do it in the right sequence - OS first, BIOS second.
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 Two drive C volumes?




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