Is AHCI the same as SCSI?

TOMJ79

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Dec 11, 2015
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I have been reading all night and most of what i find is old postings that leave me still in the dark:??:
I have a G1.Sniper Z97 Motherboard set to RAID 1 UEFI using ONE SSD as my bootdisc(windows 7) and TWO 1TB HDDS as my raid 1 setup.
After installing windows 7, my Intell SSD Toolbox trims my SSD fine and Intel Rapid Storage Technology says: SATA transfer rate: 6 Gb/s.
So all seems fine till I go into Device Manager and see that under Disk drives they say SCSI device.
Also when i use AS SSD benchmark it says iaStorA - OK. INSTEAD of an ahci driver like i have read I SHOULD have in older post...

So my question is am I getting the read write speeds I would get from AHCI?

Also when checking registry for trim its at 3 instead of 0
Can I ignore windows not detecting the ssd even though Trim works in intel toolbox?

If i change that 3 to a ZERO will i loose my raid configuration?

I found a post http://www.tomshardware.com/answers/id-1707614/ssd-ahci-raid.html#10997840 but it is old :( Thanks for any light you can shed on this subject.
 

marko55

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Any time a hard drive (incl. SSDs) are connected to a RAID controller's port, the OS will see the resultant single drive (or logical RAID volume) as a SCSI disk. Its absolutely nothing to worry about and won't hurt performance.

Can you clarify what you mean by "I created a RAID 1 with ONE SSD?" A RAID-1 array should consist of multiple drives... If you've got a single SSD that you want to use as your OS drive, even if connected to a SATA port that's configured for "RAID" in your BIOS, you don't have to actually add it to a RAID set. You'll just need to load the RAID driver during windows install (in many cases) if that drive isn't seen during the windows install.

To my knowledge, TRIM is not supported with RAID-1. The Intel chipset RAID can TRIM a RAID-0. Its possible this has changed since I last checked but I don't think so. Nothing you can do to change that.
 

Paperdoc

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I read OP's post as saying he set up an SSD as his boot device, then a RAID1 array with two 1 TB HDD's as data storage. I do not think the SSD is part of the RAID array. This means that the RAID driver should have been installed into Windows AFTER it was already installed and working on a system, because the system does not need to be able to BOOT from the RAID array. It boots from the SSD as the C: drive, then can load the RAID driver from that drive in order to gain access to the RAID array.
 

TOMJ79

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I reworded my question, hopefully it makes more sense now...

 

TOMJ79

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This is what i thought too but i must be doing something wrong because If I enable or disable Raid in BIOS after I windows 7 in UEFI will not boot, just the blue screen. I even tried installing windows 7 in UEFI mode with one HDD installed and WITHOUT one HDD installed and if removed or installed WIndows 7 will not boot. I have never had this problem when installing MBR only UEFI ...I can not find any info on UEFI though that supports my problems so figured it was my Raid 1 setup that was giving me issues?
Thank you for your reply